Mercedes-Benz C-Class Installation and operation manual

Maintenance
Booklet
Order no. P000 0054 13 Part no. 205 584 60 08 Edition B-2017
É2055846008jËÍ
2055846008

Publication details
Internet
Further information about Mercedes-Benz vehi-
cles and about Daimler AG can be found on the
following website:
http://www.mbusa.com
Service and Literature
©Daimler AG: not to be reprinted, translated or
otherwise reproduced, in whole or in part, with-
out written permission from Daimler AG.
Model
C‑Class, CLA, CLS, E‑Class, GLA, GLC, GLE, GLS,
Mercedes-AMG GT, Mercedes-AMG GT S,
S‑Class, SL, SLC
Vehicle Manufacturer
Daimler AG
Mercedesstraße 137
70327 Stuttgart
Germany
Welcome to the world of Mercedes-Benz
We want you to enjoy your Mercedes-Benz auto-
mobile. Vehicle safety and operational reliability
are two very important factors. To maintain
them, regular maintenance services are neces-
sary.
We continuously strive to improve our product
and ask for your understanding that we reserve
the right to make changes in the periodic main-
tenance work for our vehicles.
The information in this manual is accurate as of
the press date. At the time of your scheduled
maintenance appointments with your author-
ized Mercedes-Benz Center, the most current
maintenance work information will be utilized
for your vehicle’s age or mileage. Please check
with your authorized Mercedes-Benz Center for
any changes to the periodic maintenance work
required for your vehicle.
PLEASE NOTE
WE STRONGLY RECOMMEND THAT YOU HAVE
YOUR VEHICLE SERVICED BY YOUR AUTHOR-
IZED MERCEDES-BENZ CENTER WHO IS FULLY
EQUIPPED TO PROVIDE THIS SERVICE AND
THAT GENUINE MERCEDES-BENZ PARTS BE
USED.
SERVICE, REPLACEMENT, OR REPAIR OF THE
EMISSION CONTROL DEVICES AND SYSTEMS
CAN BE PERFORMED BY ANY AUTOMOTIVE
REPAIR ESTABLISHMENT OR INDIVIDUAL
USING CERTIFIED PARTS.
THE USE OF DEFECTIVE OR NON-EQUIVALENT
PARTS MAY RESULT IN YOUR EMISSION PER-
FORMANCE WARRANTY CLAIM BEING DENIED.
Symbols
The following symbols are found in this booklet:
GWARNING
Warning notes make you aware of dangers
which could pose a threat to your health or
life, or to the health and life of others.
!Highlights hazards that may result in dam-
age to your vehicle.
iHelpful hints or further information you may
find useful.
Y
page
This symbol tells you where to look for
further information on a topic.
YY This continuation symbol marks a warn-
ing or procedure which is continued on
the next page.
As at 07.12.2015

General Information .............................. 2
Vehicle data ............................................. 2
Operating safety ...................................... 2
General notes ....................................2
Danger of electric shock .................... 2
Performing work on the vehicle ......... 3
High-voltage battery .......................... 3
Maintenance Booklet ............................ 4
Introduction ............................................. 4
ASSYST PLUS service interval dis-
play .................................................... 4
Mercedes-Benz Service ...................... 4
PLUS Package .................................... 5
Tire rotation ....................................... 5
Severe operating conditions .............. 5
Wear items ......................................... 5
Tested and approved engine oils
and oil filters ...................................... 6
Regular checks .................................. 6
Notes on the warranty ....................... 6
Service records .................................. 6
Parts/Operating materials ................. 7
Emission System Maintenance ................ 7
Gasoline Engines ................................ 7
Emission Control System Caution
– Gasoline Engines ............................. 7
Emission Control System Caution
– Diesel Engines ................................ 8
BlueTEC exhaust gas aftertreat-
ment with DEF (Diesel Exhaust
Fluid) .................................................. 8
Description of Emission System Main-
tenance Jobs ............................................ 8
Changing the engine oil and filter ...... 9
Replacing the engine air-filter ............ 9
Replacing the fuel filter ...................... 9
Replacing spark plugs ........................ 9
Filling up DEF (Diesel Exhaust
Fluid) .................................................. 9
Maintenance service descriptions ........... 9
Vehicle Maintenance Service
Work (including Emission System
Maintenance) .....................................9
Maintenance work ................................... 9
Additional maintenance work ................16
Confirmations ...................................... 21
Tire rotation ...........................................21
Maintenance service .............................. 23
2055846008 É2055846008jËÍ
Contents 1

Vehicle data
X X
Model Vehicle Identification Number (VIN)
X X
Date of initial registration Paint color and code
X X
License Plate No. License Plate No.
X X
License Plate No. License Plate No.
X X
License Plate No. License Plate No.
X X
License Plate No. License Plate No.
Operating safety
General notes
Hybrid vehicles: Always read the chapter "Oper-
ating safety" as well as the hybrid operating
instructions. You could otherwise fail to recog-
nize dangers, e. g. due to high-voltage.
Danger of electric shock
The components of the hybrid system are indi-
cated by yellow warning labels to make you
aware of high voltage.
High‑voltage cables are orange‑colored.
GDANGER
The vehicle's high-voltage electrical system is
under high voltage. If you modify components
in the vehicle's high-voltage electrical system
or touch damaged components, you may be
electrocuted. The components in the vehi-
cle's high-voltage electrical system may be
damaged in an accident, although the damage
is not visible. There is a risk of fatal injury.
Following an accident, do not touch any high-
voltage components and never modify the
vehicle's high-voltage electrical system. Have
the vehicle towed away after an accident and
the vehicle's high-voltage electrical system
checked by a qualified specialist workshop.
Only specially trained technicians may carry out
work on the vehicle. If orange electric cables or
their connectors are damaged, have them
replaced immediately at a qualified specialist
workshop. We recommend that you use a
Mercedes-Benz Center for this purpose.
2Operating safety
General Information
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

Automatic deactivation of the hybrid
system
If componentsof therestraintsystem are acti-
vated during an accident, thehybrid system is
automatically deactivated.
The hybrid system is notactivated when the
vehicleis started if:
Rashort circuit is detectedin thehybrid sys-
tem.
Roneof thehybrid system’s electrical connec-
tionsis disconnected.
This ensures that you do notcome intocontact
withhigh voltage.
Performing work on the vehicle
GWARNING
Modificationsto electronic components, their
software as well as wiring can impair their
function and/orthefunction of other net-
workedcomponents. In particular, systems
relevantto safetycould also be affected. As a
result,these may no longer function as inten-
ded and/orjeopardizetheoperating safetyof
thevehicle. There is an increased riskof an
accidentand injury.
Never tamper withthewiring as well as elec-
tronic componentsor their software. You
should haveall workto electrical and elec-
tronic equipmentcarriedout at aqualified
specialistworkshop.
iRead theinformation on qualified specialist
workshopsin thehybrid operating instruc-
tions. Workcarriedout incorrectlyon the
hybrid system or modificationsmade to your
vehiclecould causethesystems of your vehi-
cle to cease functioning properly.
Always havemaintenance workon hybrid sys-
temand high-voltage system electronics and
componentsperformed by aqualified specialist.
We recommendthat you use an authorized
Mercedes-Benz Centerfor this purpose.
If you haveany questionsabout carryingout any
typeof service, turnto theadvice of an author-
ized Mercedes-Benz Center.
!Always havemaintenance workon hybrid
system and high-voltage system electronics
and components, suchas control modules,
sensorsand connecting cables, performed by
aqualified specialist workshop withthenec-
essary expertknowledge of HYBRID vehicles
and thetools to carry out theworkrequired,
e.g. at an authorizedMercedes-Benz Center.
Otherwise there is adanger that vehiclecom-
ponents may wear morerapidly, whichmay
voidthevehicle’s warranty.
High-voltage battery
GWARNING
If thehousing of thehigh-voltage battery has
been damaged, electrolyteand gasesmay
leak out.These are poisonous and caustic.
There is ariskof injury.
Avoid contact withskin, eyes or clothing.
Immediately rinse electrolytesplashes off
withwater and seekmedical attention
straight away.
When thepressureinside thehigh‑voltage bat-
tery exceeds acertain value,for examplein case
of avehiclefire, flammablegas will escape
through a ventilation valveon thevehicle’s
underbody. This prevents thehigh‑voltage bat-
tery from exploding.
GWARNING
In theevent of avehiclefire, theinternal pres-
sureof thehigh-voltage battery can exceed a
critical value.In this caseflammablegas
escapes through a ventilation valveon the
underbody. The gas can ignite. There is arisk
of injury.
Leavethedanger zone immediately. Secure
thedanger area at asuitable distance, whilst
observing legal requirements.
Operating safety 3
General Information
GWARNINGPlease makesureyou readthetechnical documentation,suchas
theOperator’sManual and workshop information,before carrying
out any maintenance work. Z

Introduction
ASSYST PLUS service interval display
Your Mercedes-Benzcomes equipped withthe
ASSYSTPLUSserviceinterval display. The
ASSYSTPLUSserviceinterval display tracksdis-
tance driven and thetime elapsed since your
last service. The maintenance serviceis indica-
tedin themultifunction display in theinstrument
cluster.
The multifunction display shows aservicemes-
sage for several seconds. Dependingon the
operating conditionsof thevehicle, theremain-
ing time or distanceuntil thenext servicedue
dateis displayed. Pleaserefer to section
"ASSYSTPLUS" in theoperator’s manual for
moreinformation on thethis subject.
Always observetheservicemessage in themul-
tifunction display of theinstrumentcluster.
Havethespecifiedservicecarried out within the
remaining distanceor theremaining time
period.
iDependingon theoperating conditionsof
thevehicle, theASSYSTPLUSserviceinterval
display may display thenext servicedue date
earlier than is indicated in this booklet.Please
see your authorizedMercedes-BenzCenter
for moreinformation on this subject.
RThe first Service Ais due at 12 monthsor
10,000miles, then every 24 monthsor
20,000miles.
RThe first Service Bis due at 24 monthsor
20,000miles, then every 24 months or
20,000 miles.
A descriptive listing of the service items are
contained in this booklet starting on
(Ypage 9). Following each maintenance ser-
vice, your authorized Mercedes-Benz Center will
reset the ASSYST PLUS service interval display
by confirming the service items performed.
The authorized Mercedes-Benz Center perform-
ing the maintenance services will confirm the
work has been carried out using the Confirma-
tion pages in this booklet (Ypage 21).
We continuously strive to improve our product
and ask for your understanding that we reserve
the right to make changes in the periodic main-
tenance work for our vehicles.
The information in this booklet is accurate as of
the press date. At the time of your scheduled
maintenance appointments with your author-
ized Mercedes-Benz Center, the most current
maintenance work information will be utilized
for your vehicle’s age or mileage. Please check
with your authorized Mercedes-Benz Center for
any changes to the periodic maintenance work
for your vehicle.
iIf the ASSYST PLUS service interval display
was inadvertently reset, have an authorized
Mercedes-Benz Center correct it. Please only
reset if the proper maintenance service has
been performed. Resetting the system with-
out performing the proper maintenance ser-
vice will result in engine and/or other vehicle
damage not covered by the Mercedes-Benz
New Vehicle Limited Warranty.
Mercedes-Benz Service
Even a Mercedes-Benz needs maintenance and
care. This is why your authorized Mercedes-
Benz Center inspects your vehicle at regular
intervals. They put it through its paces, even
during a basic inspection service. You can there-
fore be certain that even after many thousands
of miles, your Mercedes-Benz will still be run-
ning as safely and reliably as it did on the first
day.
The basic service focuses on fundamental, tech-
nically essential maintenance work. That makes
it particularly cost-effective for you. And the
specified maintenance procedures make the
process transparent from the start.
The following pages describe when such a ser-
vice is required and what procedures are carried
out on your Mercedes-Benz.
With us, your vehicle is in the best of hands. At
an authorized Mercedes-Benz Center, you will
find the experience and expertise of over
100 years of vehicle design and manufacture.
Should your vehicle be due for a service, simply
bring it to an authorized Mercedes-Benz Center.
In particular, work relevant to safety or on
safety-related systems must be carried out at a
qualified specialist workshop. Also observe the
"Genuine Mercedes-Benz parts" section in the
Operator’s Manual.
iPlease note any maintenance work not per-
formed or not performed at the specified
interval which results in the failure of the war-
ranted component(s) or system(s) in question
4Introduction
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

may not be covered by the Mercedes-Benz
New Vehicle Limited Warranty.
PLUS Package
You may select the optional PLUS package as a
supplement to the basic service. This encom-
passes all the simple maintenance work that
you could carry out yourself.
You can obtain further information concerning
the servicing of your vehicle from an authorized
Mercedes-Benz Center.
Tire rotation
Your vehicle’s tires are a critical component to
overall vehicle performance and vehicle stabil-
ity. The useful life of tires will vary and is pro-
portional to tire type, speed rating, ambient con-
ditions, tire loading, tire inflation pressure, road
surfaces, and individual driving style, among
other factors. Therefore, Mercedes-Benz rec-
ommends regular checks for wear and proper
inflation and, if applicable to your vehicle’s tire
configuration, tire rotation.
Tire rotations can be performed on vehicles with
the same front and rear tire dimensions. If your
vehicle is equipped with the same tire dimen-
sions, tires can be rotated by observing a front-
to-rear rotation pattern that will maintain the
intended rotation (spinning) direction of the tire
(on unidirectional tires, an arrow on the sidewall
indicates the intended rotation or spinning
direction of the tire). In some cases, such as
when your vehicle is configured with staggered
sizes (different tire sizes, front vs. rear), tire
rotations are not possible.
If your vehicle’s tire configuration allows for tire
rotation, tire rotation should be performed in
accordance with the recommended intervals, or
sooner at first signs of irregular (uneven) tread
wear. Tire rotation recommendations will likely
necessitate a tire rotation at every Service B
based on Mercedes-Benz maintenance inter-
vals.
For your convenience, this Maintenance Booklet
contains a tire rotation confirmation page on
which you can record the date and mileage
when tire rotations were performed
(Ypage 21).
Severe operating conditions
The maintenance intervals have been deter-
mined so that the vehicle, under normal oper-
ating conditions, should operate properly
between maintenance services. Severe operat-
ing conditions may call for correspondingly
sooner replacement of the following items:
RInterior filters
(e.g. dust filter or activated charcoal dust fil-
ter) are replaced as called for by the ASSYST
PLUS service interval display. Under severe
dust conditions, or with the Climate Control
frequently operating in the air recirculation
mode, the filter should be replaced more fre-
quently than indicated by the ASSYST PLUS
service interval display.
RSpark plugs
Spark plugs should be replaced according to
the specified maintenance interval. Severe
operating conditions (frequent starting and
stopping, excessive idling, sustained fast
highway driving) may call for spark plugs to be
replaced correspondingly sooner.
RCoolant
Have the coolant (water/anticorrosion/anti-
freeze mixture) replaced at the specified
maintenance interval.
Replacement of coolant may be required
more frequently if coolant is not maintained
according to instructions and/or other than
approved anticorrosion/antifreeze products
for your vehicle are being used. For instruc-
tions on coolant, see "Coolant" in your vehicle
Operator’s Manual. For a listing of approved
anticorrosion/antifreeze products for your
vehicle, contact your authorized Mercedes-
Benz Center.
Wear items
While the ASSYST PLUS service interval display
calls for inspection of certain wear items, the
system does not make any judgment on the
condition of these wear items. Only a qualified
technician can determine if a wear item needs to
be replaced.
Introduction 5
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

Tested and approved engine oils and
oil filters
Engine oils and oil filters are specifically tested
for their suitability in our engines and durability
for our service intervals. Therefore, only use
approved engine oils and oil filters required for
vehicles with the ASSYST PLUS service interval
display. Conventional petroleum-based oils
must not be used for vehicles equipped with the
ASSYST PLUS service interval display.
The following cases are not covered by the
Mercedes-Benz New Vehicle Limited Warranty:
Rusing engine oils and oil filters of specification
other than those expressly required for the
ASSYST PLUS service interval display.
Rchanging of oil and oil filter at change inter-
vals longer than those called for by the
ASSYST PLUS service interval display.
Rusing any oil additives.
Refer to the Operator’s Manual for information
on selecting the proper engine oils for your vehi-
cle. The information can be found in the "Service
products and filling capacities" section of the
"Technical data" chapter under "Engine oil".
Regular checks
In addition to the services, we recommend that
you check the following items regularly (for
example: weekly, when refueling, or before any
long journey):
REngine oil level – Further information about
engine oil level measurement can be found in
the vehicle Operator's Manual.
RCoolant level – Please refer to the Operator’s
Manual for the correct procedure to check the
coolant level.
RBrake fluid level – If brake fluid has to be
added, see an authorized Mercedes-Benz
Center to determine the cause, e.g. leaks or
worn brake pads.
RWindshield washing system – Add washer
fluid mixed with Mercedes-Benz windshield
washer solvent/concentrate, test function
and check wiper blades.
RLighting system
RTire condition and pressures – Check at
least monthly. Please refer to section "Tires
and wheels" in the Operator's Manual for
guidelines and correct procedures to check
tire condition and pressures.
Notes on the warranty
An extensive and well-equipped network of
authorized Mercedes-Benz Centers is at your
disposal for service work. Your authorized
Mercedes-Benz Center can ensure that your
vehicle is professionally and thoroughly serv-
iced and repaired.
Please see the Service and Warranty Informa-
tion booklet for detailed information on war-
ranty terms and coverage.
Please follow the instructions given in this
Maintenance Booklet, even if you entrust
the vehicle to a third party for use or care.
Only in this way will you be able to ensure
that your warranty rights are not affected.
Service, replacement, or repair of the emis-
sion control devices and systems can be
performed by any automotive repair estab-
lishment or individual using certified parts.
We strongly recommend that you have your
vehicle serviced by your authorized
Mercedes-Benz Center which is fully equip-
ped to provide this service.
Please note that engines have to be serviced in
accordance with special instructions and using
special measuring equipment to comply with
legal requirements concerning exhaust emis-
sions. Modifications to or tampering with emis-
sions components is not permissible. Your
authorized Mercedes-Benz Center is familiar
with the relevant regulations.
Service records
Your authorized Mercedes-Benz Center will cer-
tify in this booklet the maintenance services on
your vehicle which it has performed.
Other than the maintenance services described,
the Maintenance Booklet does not record or
reflect any repair work that may have been per-
formed to your vehicle. Please keep those
receipts with your vehicle records.
For information concerning warranty, see your
Service and Warranty Information booklet.
6Introduction
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

Your authorized Mercedes-Benz Center will
gladly furnish additional information on the
maintenance of your vehicle.
Mercedes-Benz USA, LLC
A Daimler Company
Parts/Operating materials
We recommend only the use of Genuine
Mercedes-Benz parts for service and repairs,
since they meet our specifications. It is also
important to only use fuels, lubricants and anti-
corrosion/antifreeze coolant meeting factory
specifications. Please see your authorized
Mercedes-Benz Center for more information on
this subject.
Emission System Maintenance
Gasoline Engines
The U.S. Environmental Protection Agency and,
in California, the Air Resources Board have cer-
tified that the emission control systems of your
vehicle comply with the applicable exhaust
emission standards.
To be certain that the emission control systems
function as designed, regular maintenance is
necessary for components of the vehicle which
affect exhaust and evaporative emissions com-
position.
The vehicle owner is responsible for the regular
maintenance of the emission control system, as
well as the use of premium unleaded gasoline
with an anti-knock index of at least 91 (dis-
played on the pump) in all gasoline engine mod-
els unless otherwise specified.
Failure to properly maintain the emission sys-
tem may result in repairs not being covered by
the emission system warranties.
Explanations of each maintenance job are given
on (Ypage 8).
Emission Control System Caution –
Gasoline Engines
Your Mercedes-Benz vehicle is equipped with
both a three-way catalyst and a closed loop oxy-
gen sensor system to comply with current
exhaust emission regulations. Keep your vehicle
in proper operating condition by following our
recommended maintenance instructions as out-
lined.
The following must be adhered to:
a) In all gasoline engine models, use only
premium unleaded gasoline with an anti-
knock index of at least 91 (as displayed on
the pump) unless otherwise specified. Dam-
age to the engine could occur if premium unlea-
ded fuel is not used. Refer to the Operator’s
Manual for special precautions.
b) Leaded gasoline should not be used
under any circumstances. Damage to the
emission control components will result.
c) In non flex‑fuel capable gasoline engine
equipped vehicles, ethanol blends greater
than E10 should not be used. Damage to the
engine could occur if improper fuels are used.
Refer to the Operator’s Manual for special pre-
cautions.
d) In select models, the use of Ethanol (E85)
is also permissible. Models capable of also
operating with E85 are identified by a label on
the fuel filler flap reading ’Premium gasoline or
E85 only!’. Do not use Ethanol fuel (E85) to
operate any vehicle unless it is specifically iden-
tified as Ethanol fuel (E85) compatible. Damage
to the engine could occur if improper fuels are
used. Refer to the Operator’s Manual for special
precautions.
e) The specified engine maintenance jobs
must be performed completely and at the
required intervals. Properly functioning spark
plugs for instance are important for the service
life of the catalysts. Failure to properly perform
the specified maintenance jobs may adversely
affect the emission control system on the vehi-
cle and reduce its service life.
f) The operation of the emission control sys-
tem must not be altered in any way. Altera-
tions are not permissible by law. In addition,
alterations may result in damage to the cata-
lysts, increased fuel consumption, and impaired
engine running conditions.
g) Irregular engine running conditions
should be corrected immediately by an
authorized Mercedes-Benz Center. Such
irregular running conditions can influence the
proper function of the emission control system.
If the check engine indicator lamp in the instru-
ment cluster illuminates when the engine is run-
ning, it indicates a possible malfunction of the
Emission System Maintenance 7
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

engine management system or emission control
system.
We recommend that you have the malfunction
checked as soon as possible.
Emission Control System Caution –
Diesel Engines
Your Mercedes-Benz is equipped with emission
control devices to comply with current diesel
exhaust emission regulations where the vehicle
is certified for sale. Keep your vehicle in proper
operating condition by following our recommen-
ded maintenance instructions as outlined.
The following must be adhered to:
a) Diesel engines require ULTRA-LOW SULFUR
HIGHWAY DIESEL FUEL (15 ppm SULFUR MAX-
IMUM) that meets the ASTM D975 standard.
Failure to use ULTRA-LOW SULFUR HIGHWAY
DIESEL FUEL (ULSD) can severely damage the
vehicle's exhaust after-treatment device.
b) Mercedes-Benz USA approves the use of B5
(standard ULSD which may contain a maximum
of 5% biodiesel) in all BlueTEC diesel engines.
Diesel fuels containing a higher proportion of
biodiesel, e.g. B20, as well as straight biodiesel
may cause severe damage to your engine/fuel
system and are not approved.
Please ask your service station for further infor-
mation. If the B5 biodiesel blend is not suffi-
ciently labeled to clearly indicate that it meets
the USLD standard, please do not use it. The
Mercedes-Benz Limited Warranty does not
cover damage caused by the use of fuels not
meeting Mercedes-Benz approved fuel stand-
ards.
c) The specified engine maintenance jobs
have to be performed completely and at the
required intervals.
d) The operation of the emission control
system must not be altered in any way.
Alterations are not permissible by law. In addi-
tion, alterations may result in damage to the
catalysts, increased fuel consumption, and
impaired engine running conditions.
If the check engine indicator lamp in the instru-
ment cluster illuminates when the engine is run-
ning, it indicates a possible malfunction of the
engine management system or emission control
system.
We recommend that you have the malfunction
checked as soon as possible.
BlueTEC exhaust gas aftertreatment
with DEF (Diesel Exhaust Fluid)
Diesel engine, please refer to the Operator’s
Manual for information on DEF. The information
can be found in the "Service products and filling
capacities" section of the "Technical data" chap-
ter under "DEF".
The BlueTEC exhaust gas aftertreatment system
requires DEF in order to function properly. Main-
taining the level and condition of the DEF is part
of the regular maintenance service work. Under
normal driving conditions, one tankful of DEF
should suffice until the next maintenance ser-
vice.
DEF is a non-flammable, non-toxic, colorless
and odorless, water-soluble liquid.
!Only use DEF complying with ISO 22241. Do
not add special additives to DEF and do not
dilute DEF with water. Otherwise, the BlueTEC
exhaust gas aftertreatment system could be
damaged.
Description of Emission System Main-
tenance Jobs
The composition of exhaust emissions is influ-
enced not only by the special emission control
equipment, but also by various engine compo-
nents and their adjustments.
Therefore, emission system maintenance must
include these engine components. Some main-
tenance jobs are actually only tests. They are
important however, because they allow early
detection of discrepancies which can later lead
to increased exhaust emissions. It is generally
less expensive to have such items adjusted
immediately rather than allowing them to con-
tribute to costly repairs. The maintenance inter-
vals have been determined so that the vehicle,
under normal conditions, should operate prop-
erly between services.
8Description of Emission System Maintenance Jobs
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

Changing the engine oil and filter
Change the engine oil and oil filter according to
the specified maintenance intervals. If oil con-
sumption should increase, determine the cause
and take necessary corrective steps. Do not
reset the ASSYST PLUS service interval display
if the oil level is adjusted or changed outside the
specified maintenance intervals.
Replacing the engine air-filter
The engine air-filter must be replaced according
to the specified maintenance intervals. Under
severe dust conditions the engine air-filter
should be replaced more frequently than indi-
cated by the ASSYST PLUS service interval dis-
play. Clean air filter cover and housing prior to
removal of air filter.
Replacing the fuel filter
Replace the fuel filter according to the specified
maintenance intervals.
Replacing spark plugs
Spark plugs are subject to electrode erosion and
must be replaced according to the specified
maintenance intervals, or more frequently as
may be required when subject to severe oper-
ating conditions.
Filling up DEF (Diesel Exhaust Fluid)
Fill up DEF according to the specified mainte-
nance intervals.
Maintenance service descriptions
Vehicle Maintenance Service Work
(including Emission System Mainte-
nance)
iMaintenance services should be performed
at the number of miles or years (whichever
comes first) as indicated.
Detailed descriptions for the maintenance
service can be found starting on
(Ypage 9).
Additional maintenance work is taken into
account depending on time and distance
driven. Additional work includes maintenance
work carried out due to technical require-
ments in cases of wear or work carried out on
any optional equipment which might require
service.
For an overview of possible additional main-
tenance work, see (Ypage 16).
For description of emission system mainte-
nance jobs, see (Ypage 8).
Maintenance work
Service A Service B
All vehicles
Read out service data from instrument cluster and reset ASSYST PLUS service interval
display1
• •
Check warning and function indicator lamps in the instrument cluster • •
1If theserviceand maintenance work has not, or has only partially been carried out after theASSYSTPLUS
serviceinterval display has been reset,themaintenance computer must be reset to its original settings.
Maintenance work 9
Maintenance Booklet
GWARNINGPleasemakesure you read thetechnical documentation,suchas
theOperator’s Manual and workshopinformation, before carrying
out any maintenance work.

Service A Service B
Check illumination of the instrument cluster and interior lighting for correct function2• •
Check horn for correct function • •
Check and correct headlamp setting3•
Check trunk/cargo compartment lighting for correct function2• •
Check and correct windshield washer system fluid level2. Washer fluid to be invoiced
separately
• •
Check condition of vehicle exterior • •
Check condition of windshield • •
Check condition of wiper blades • •
Engine: oil and oil filter change • •
Brake system: check fluid level4• •
Main circuit: check coolant level in coolant expansion tank • •
Visually check condition and tread depth of tires • •
Visually check condition of brake pads/linings • •
Visually check condition of brake disks • •
Correct tire inflation pressure2• •
Correct inflation pressure in spare tire (where applicable)2• •
Check TIREFIT sealant expiration date (where applicable)2. If expired, replace with sep-
arate work order
• •
Activate Tire Pressure Monitoring System2• •
Check first aid kit expiration date2. If expired, replace with separate work order. • •
Vehicles with KEYLESS-GO: replace key battery5• •
Fill up DEF6(Diesel engine, only vehicles with BlueTEC exhaust gas aftertreatment) • •
Additional service and maintenance work for your vehicle can be found on the
following pages.
• •
2PLUS package, invoiced separately.
3Vehicles with Xenon headlamps, LED headlamps, dynamic LED headlamps or level control: correct headlamp
setting with separate work order.
4In the event of fluid loss, determine cause and perform repair with separate work order.
5Replace with separate work order
6Filling up invoiced separately.
10 Maintenance work
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

C-Class CLA CLS E-Class GLA GLC GLE (except GLE Coupe) GLE Coupe GLS Mercedes-AMG GT/GT S S-Class (Coupe, Cabriolet) S-Class (Sedan) SL SLC
Service A
Clean visible area of water
deflector
• • • • • • •
Replace dust filter7• • • • •
Clean and lubricate soft
top seals (where applica-
ble)2, 8
•
Low-temperature circuit:
check coolant level in cool-
ant expansion tank (where
applicable)9
• • • • •
High-voltage battery cir-
cuit: Check coolant level4
(plug-in hybrid vehicles
only)
•
Check all visible parts in
the engine compartment
for damage and leaks4
• • • • •
MAGIC BODY CONTROL:
check fluid level (where
applicable)4, 10
•
Check poly-V-belt for wear
in visible area (where
applicable)
• • • • •
7The specific maintenance interval for your country applies. Observe the notes in the workshop information.
2PLUS package, invoiced separately.
8In the event of damage, determine cause and perform repair with separate work order.
9Engines with separate coolant expansion tank for low-temperature circuit only. Observe the notes in the
workshop information.
4In the event of fluid loss, determine cause and perform repair with separate work order.
10 MAGIC BODY CONTROL (Code 487)
Maintenance work 11
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

C-Class CLA CLS E-Class GLA GLC GLE (except GLE Coupe) GLE Coupe GLS Mercedes-AMG GT/GT S S-Class (Coupe, Cabriolet) S-Class (Sedan) SL SLC
Check air flap in engine
compartment11
(engine 177, 178)
• •
Check parking brake
(function test only)12
• • • • • • • • •
Check all visible compo-
nents on the vehicle
underside for leaks and
damage4, 13
• • • • •
Check underbody protec-
tion14
•
Check tires for damage
and cracks
• • • • •
Check condition of steer-
ing system and tie rods
• • • • •
Check condition of front
axle and front axle ball
joints
• • • • •
Check condition of propel-
ler shaft and flexible cou-
plings
• • • •
Check condition of rear
axle and rear axle ball
joints
• • • • •
Check condition of spring
strut or shock absorber
and spring
• • • • •
11 The air flap must be able to move without any resistance and close automatically.
12 Vehicles with four-wheel drive 4MATIC: If brake test is carried out on a dynamometer, the brake test may not
exceed 10 seconds on each axle. You could otherwise damage the drive train or the brake system.
4In the event of fluid loss, determine cause and perform repair with separate work order.
13 Country-specific regulations for mobility and body shell complaints apply.
14 In the event of damage, refinish underbody protection with separate work order
12 Maintenance work
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

C-Class CLA CLS E-Class GLA GLC GLE (except GLE Coupe) GLE Coupe GLS Mercedes-AMG GT/GT S S-Class (Coupe, Cabriolet) S-Class (Sedan) SL SLC
Check charging cable and
vehicle socket for mechan-
ical damage15 (plug-in
hybrid vehicles only)
• • •
Always observe the
applicable additional
maintenance work.
(Ypage 16)
••••••••••••••
C-Class CLA CLS E-Class GLA GLC GLE (except GLE Coupe) GLE Coupe GLS Mercedes-AMG GT/GT S S-Class (Coupe, Cabriolet) S-Class (Sedan) SL SLC
Service B
Check exterior lighting for
correct function
••••••••••••••
Check headlamp range
control for correct func-
tion16, 17 (where applica-
ble)
• • • • • • • • • •
Check windshield wipers,
windshield washer and
headlamp cleaning system
for correct function18
••••••••••••••
15 In the event of damage, replace with separate work order.
16 Vehicles with Xenon headlamps or dynamic LED headlamps
17 Not for passive headlamps in combination with active suspension.
18 Depending on the vehicle’s equipment.
Maintenance work 13
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

C-Class CLA CLS E-Class GLA GLC GLE (except GLE Coupe) GLE Coupe GLS Mercedes-AMG GT/GT S S-Class (Coupe, Cabriolet) S-Class (Sedan) SL SLC
Replace dust filter7• • • • •
Replace activated char-
coal dust filter
••••••••••••••
Clean visible area of water
deflector
• • • • • • •
Clean and lubricate soft
top seals (where applica-
ble)2, 8
•
Low-temperature circuit:
check coolant level in cool-
ant expansion tank (where
applicable)9
• • • • • • • • •
High-voltage battery cir-
cuit: Check coolant level4
(plug-in hybrid vehicles
only)
• •
Check all visible parts in
the engine compartment
for damage and leaks4
• • • • • • • • •
MAGIC BODY CONTROL or
ACTIVE BODY CONTROL:
check fluid level (where
applicable)4, 19
• •
Check poly-V-belt for wear
in visible area (where
applicable)
• • • • • • • • •
7The specific maintenance interval for your country applies. Observe the notes in the workshop information.
2PLUS package, invoiced separately.
8In the event of damage, determine cause and perform repair with separate work order.
9Engines with separate coolant expansion tank for low-temperature circuit only. Observe the notes in the
workshop information.
4In the event of fluid loss, determine cause and perform repair with separate work order.
19 MAGIC BODY CONTROL or ACTIVE BODY CONTROL (Code 487)
14 Maintenance work
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

C-Class CLA CLS E-Class GLA GLC GLE (except GLE Coupe) GLE Coupe GLS Mercedes-AMG GT/GT S S-Class (Coupe, Cabriolet) S-Class (Sedan) SL SLC
Check air flap in engine
compartment11
(engine 177, 178)
• •
Check parking brake
(function test only)12
••••••••••••••
Check all visible compo-
nents on the vehicle
underside for leaks and
damage4, 13
• • • • • • • • •
Check underbody protec-
tion14
•
Check tires for damage
and cracks
• • • • • • • • •
Check condition of steer-
ing system and tie rods
• • • • • • • • •
Check condition of front
axle and front axle ball
joints
• • • • • • • • •
Check condition of propel-
ler shaft and flexible cou-
plings
•20 • • •20 • • • • •
Check condition of rear
axle and rear axle ball
joints
• • • • • • • • •
Check condition of spring
strut or shock absorber
and spring
• • • • • • • • •
11 The air flap must be able to move without any resistance and close automatically.
12 Vehicles with four-wheel drive 4MATIC: If brake test is carried out on a dynamometer, the brake test may not
exceed 10 seconds on each axle. You could otherwise damage the drive train or the brake system.
4In the event of fluid loss, determine cause and perform repair with separate work order.
13 Country-specific regulations for mobility and body shell complaints apply.
14 In the event of damage, refinish underbody protection with separate work order
20 Vehicles with four-wheel drive 4MATIC only.
Maintenance work 15
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

C-Class CLA CLS E-Class GLA GLC GLE (except GLE Coupe) GLE Coupe GLS Mercedes-AMG GT/GT S S-Class (Coupe, Cabriolet) S-Class (Sedan) SL SLC
Power steering: check oil
level (where applica-
ble)4, 21, 22
• • •
Check charging cable and
vehicle socket for mechan-
ical damage15 (plug-in
hybrid vehicles only)
• • •
Always observe the
applicable additional
maintenance work.
(Ypage 16)
••••••••••••••
Additional maintenance work23
C-Class CLA CLS E-Class GLA GLC GLE (except GLE Coupe) GLE Coupe GLS Mercedes-AMG GT/GT S S-Class (Coupe, Cabriolet) S-Class (Sedan) SL SLC
Once at 2,000 miles
Rear axle: oil change24 • • •
4In the event of fluid loss, determine cause and perform repair with separate work order.
21 The oil level must, corresponding to the oil temperature, always lie at the maximum mark.
22 Vehicles with hydraulic power steering only.
15 In the event of damage, replace with separate work order.
23 Additional maintenance work is subject to a separate invoice.
24 Only for Mercedes-AMG vehicleswith self-locking rear axle differential (Code 467 or 471) or AMG Perform-
ance Package (Code P30) or AMG Handling Package (Code P30).
16 Additional maintenance work
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

C-Class CLA CLS E-Class GLA GLC GLE (except GLE Coupe) GLE Coupe GLS Mercedes-AMG GT/GT S S-Class (Coupe, Cabriolet) S-Class (Sedan) SL SLC
Once at first Service A
Rear axle: oil change
(engine 278 with auto-
matic transmission NAG3
only)
•
At every service
Replace engine air-filter
(Mercedes-AMG vehicles
only)
• •
Check driving aids25
(where applicable)
••••••••••••••
At every Service A
Rear axle: oil change
(Mercedes-AMG vehicles
with 4MATIC only)
• •
Every 2 years
Replace brake fluid • • • • • • • • • • • • • •
At every Service B
Trailer tow hitch: check
condition and functional-
ity26
• • • •
Once at 30,000 miles/
3 years
Automatic transmission:
oil and oil filter change27
(engine 157, 177)
• • • • •
25 If the vehicle is equippedwith adriving aid at the factory, e.g. assisted steering or a hand control unit.
26 With trailer tow hitch (Code 550).
27 Please note the instructions in the workshop information.
Additional maintenance work 17
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.

C-Class CLA CLS E-Class GLA GLC GLE (except GLE Coupe) GLE Coupe GLS Mercedes-AMG GT/GT S S-Class (Coupe, Cabriolet) S-Class (Sedan) SL SLC
Every 30,000 miles/
3 years
Rear axle: oil change24 • • •
Replace engine air-filter
(engine 157, 177, 279)
• • • • • • • •
Replace coolant for main
circuit28 (engine 277, 279)
•••
Automatic transmission:
oil and oil filter change27
(engine 133)
• •
Panorama sliding sunroof:
clean and lubricate guide
mechanism (where appli-
cable)29
•• •••••• •
Every 40,000 miles/
4 years
Replace spark plugs (gas-
oline engines, Mercedes-
AMG vehicles only)
• •
Replace engine air-filter
(engine 178)
•
Automatic transmission:
oil and oil filter change27
•
Every 50,000 miles/
5 years
Replace engine air-filter
(engine 270, 274, 276,
277, 278, 642, 651)
••••••••• ••••
24 Only for Mercedes-AMG vehicleswith self-locking rear axle differential (Code 467 or 471) or AMG Perform-
ance Package (Code P30) or AMG Handling Package (Code P30).
28 Observe the correct coolant mixture ratio.
27 Please note the instructions in the workshop information.
29 Panorama sliding sunroof (Code 413).
18 Additional maintenance work
Maintenance Booklet
GWARNING Please make sure you read the technical documentation, such as
the Operator’s Manual and workshop information, before carrying
out any maintenance work.