Mercedes-Benz V12 Biturbo M 279 AMG Reference manual

Introduction of the New V12 Biturbo
Engine M 279 AMG
Introduction into Service Manual
Daimler AG, GSP/OR, HPC R 822, D-70546 Stuttgart
Order No. 6516 1392 02 - HLI 000 000 08 01 – Printed in Germany – 06/12
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Mercedes-Benz Service
Daimler AG · Technical Information and Workshop Equipment (GSP/OR) · D-70546 Stuttgart
Introduction of the New V12 Biturbo Engine
M 279 AMG
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© 2012 by Daimler AG
This document, including all its parts, is protected by copyright.
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Daimler AG, Department GSP/ORS, HPC R822, W002, D-70546 Stuttgart.
This applies in particular to reproduction, distribution, alteration, translation,
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databases and online services.
Image no. of title image: P01.10-3109-00
Order no. of this publication: 6516 1392 02 – HLI 000 000 08 01
06/12
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Contents
3b
Introduction of the New V12 Biturbo Engine, M 279 AMG
Preface 5
Overview
Highlights 6
Engine data comparison: M 275 AMG - M 279 AMG 7
Engine views 9
Maintenance
ASSYST 15
Mechanical components
Crankcase 16
Oil pan 20
Crank assembly 21
Cylinder head 22
Belt drive 24
Combustion
Charging 25
Fuel system 31
Exhaust system 36
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Contents
4bIntroduction of the New V12 Biturbo Engine, M 279 AMG
Cooling and lubrication
Engine cooling 41
Turbocharger cooling 46
Charge air cooling 47
Engine lubrication 49
Electrical and electronic systems
Engine control 52
Ignition system 58
On-board diagnosis 60
Special tools
Electrical/mechanical components 62
Annex
Abbreviations 63
Index 64
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Preface
5b
Introduction of the New V12 Biturbo Engine, M 279 AMG
Dear reader,
This Introduction into Service manual presents the
new V12 biturbo engine M 279 from Mercedes-AMG in
the vehicle model series 231.
The purpose of this brochure is to acquaint you with
the technical highlights of this new engine in advance
of their market launch. This brochure is intended to
provide information for people employed in service or
maintenance/repair as well as for aftersales staff. It is
assumed that the reader is already familiar with the
engines in the various Mercedes-Benz models
currently on the market.
This Introduction into Service manual is not intended
as an aid for repairs or for the diagnosis of technical
problems. For such needs, more extensive information
is available in the Workshop Information System (WIS)
and Xentry Diagnostics.
WIS is updated continuously. Therefore,
the information available there reflects the latest
technical status of our vehicles.
This Introduction into Service manual presents initial
information relating to the new engine and, as such, is
not stored in WIS. The contents of this brochure are
not updated. No provision is made for supplements.
We will publicize modifications and new features
in the relevant WIS documents. The information
presented in this Introduction into Service Manual
may therefore differ from the more up-to-date
information found in WIS.
While this brochure's technical content is valid as of
our publication date in April 2012, actual production
vehicles may incorporate revisions and design
changes based on differing technical specifications.
Daimler AG
Technical Information
and Workshop Equipment (GSP/OR)
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Highlights
6
Overview
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
In September 2012 Mercedes-AMG will introduce
the new 12-cylinder V-engine M 279 AMG in the
new SL-Class (model series 231).
This advanced V12 engine with the model designa-
tion M 279 focuses rigorously on performance and
fuel efficiency in equal measure. It replaces the
successful unit of engine model M 275.
Numerous combustion-related and applicational
optimizations have significantly reduced fuel
consumption and emissions while simultaneously
increasing engine performance. Also helping to
improve emission levels and fuel economy is the
new AMG SPEEDSHIFT PLUS 7G-TRONIC with
second-generation "Controlled Efficiency" start/
stop function including alternator management,
which has been modified to cope with the high
torque of the M 279 AMG.
The main features of the V12 biturbo engine
M 279 AMG in brief:
• Two modified turbochargers with air/water
intercooling and wastegate valve
• New engine control unit
• New dedicated ignition coils (dual ignition) with
multispark ignition process
• Full-aluminum crankcase with pulsation bores
• One-piece chain drive
• Forged crankshaft made of high-quality alloy
steel
• Re-engineered forged pistons
• Roller-type cam followers
• Two intake valves and one exhaust valve per
cylinder
• Hollow-stemmed exhaust valves with sodium
filling
• Low-temperature circuit with expansion
reservoir
P01.10-3110-00
M 279 AMG, V12-cylinder with 6.0 l displacement and biturbo charging
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Engine data comparison: M 275 AMG - M 279 AMG
Overview
7
Introduction of the New V12 Biturbo Engine, M 279 AMG b
M 275 KE60 LA AMG
M 275.981
M 279 KE60 LA AMG
M 279.981
Cylinder configuration/angle V12/60°
Rated output
at engine speed
kW
rpm
450
4800-5100
463
4800-5400
Rated torque
at engine speed
Nm
rpm
1000
2000-4000
1000
2300-4300
Displacement cm35980 5980
Bore mm 82.6
Stroke mm 93
Cylinder spacing mm 90
Compression ratio ε9.0
Connecting rod length mm 142.3
Forced induction 2 turbochargers
Turbocharger control Wastegate
Boost pressure (max.) bar 1.5
Oil change quantity (with filter) l9.5
Coolant filling capacity
(with heater circuit)
Main circuit
Low-temperature circuit
l
l
11.8
3.2
11.8
3.5
Fuel type Super Plus 98 RON
Engine weight
DIN 70020 GZ
kg 246 248
Emissions regulation
ECE/USA EU5/ULEV EU5+/ULEV II
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Engine data comparison: M 275 AMG - M 279 AMG
8
Overview
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
P01.00-3353-00
Torque and power curve, M 275 AMG and M 279 AMG
MTorque
PPo
wer
n Engine speed
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Engine views
Overview
9
Introduction of the New V12 Biturbo Engine, M 279 AMG b
P01.10-3111-00
View of engine from above
1 Air filter housing, right cylinder bank
2 Charge air cooler, right cylinder bank
3 Charge air cooler, left cylinder bank
4 Air filter housing, left cylinder bank
B28/4 Pressure sensor downstream of air filter,
left cylinder bank
B28/5 Pressure sensor downstream of air filter,
right cylinder bank
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Engine views
10
Overview
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
P01.10-3112-00
View of engine from above
A9 Refrigerant compressor
B11/4 Coolant temperature sensor
G2 Alternator
M16/6 Throttle valve actuator
T1/1 Cylinder 1 ignition coil
T1/2 Cylinder 2 ignition coil
T1/3 Cylinder 3 ignition coil
T1/4 Cylinder 4 ignition coil
T1/5 Cylinder 5 ignition coil
T1/6 Cylinder 6 ignition coil
T1/7 Cylinder 7 ignition coil
T1/8 Cylinder 8 ignition coil
T1/9 Cylinder 9 ignition coil
T1/10 Cylinder 10 ignition coil
T1/11 Cylinder 11 ignition coil
T1/12 Cylinder 12 ignition coil
Y32/1 Air pump 1 switchover valve
Y32/2 Air pump 2 switchover valve
Y77/1 Boost pressure control pressure transducer
Y101 Bypass air switchover valve
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Engine views
Overview
11
Introduction of the New V12 Biturbo Engine, M 279 AMG b
P01.10-3113-00
View of engine from above
1 Left air shutoff valve
2 Right air shutoff valve
B17/8 Charge air temperature sensor
B28/7 Pressure sensor downstream of throttle valve
B89 Secondary air pressure sensor
M33 Electric air pump
Y62/1 Cylinder 1 injection valve
Y62/2 Cylinder 2 injection valve
Y62/3 Cylinder 3 injection valve
Y62/4 Cylinder 4 injection valve
Y62/5 Cylinder 5 injection valve
Y62/6 Cylinder 6 injection valve
Y62/7 Cylinder 7 injection valve
Y62/8 Cylinder 8 injection valve
Y62/9 Cylinder 9 injection valve
Y62/10 Cylinder 10 injection valve
Y62/11 Cylinder 11 injection valve
Y62/12 Cylinder 12 injection valve
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Engine views
12
Overview
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
P01.10-3114-00
View of engine from rear
B6/1 Camshaft Hall sensor
28/6 Pressure sensor upstream of throttle valve
B70 Crankshaft Hall sensor
M1 Starter
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Engine views
Overview
13
Introduction of the New V12 Biturbo Engine, M 279 AMG b
P01.10-3115-00
View of engine from left
1 Blow-off valve
2 Left turbocharger
A16/1 Knock sensor 1
A16/2 Knock sensor 2
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Engine views
14
Overview
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
P01.10-3116-00
View of engine from right
1 Blow-off valve
2 Right turbocharger
A16/3 Knock sensor 3
A16/4 Knock sensor 4
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ASSYST
Maintenance
15
Introduction of the New V12 Biturbo Engine, M 279 AMG b
New technical features
The new engine M 279 AMG is being introduced in
the SL-Class. The maintenance intervals remain the
same as for its predecessor engine M 275.
When it is launched in model series 231, two
coolant circuits will be installed, each with one
expansion reservoir.
The interval for the low-temperature circuit is "every
200,000 km/10 years", and for the main circuit it is
"every 50,000 km/3 years".
The oil change interval for the 7-speed automatic
transmission AMG SPEEDSHIFT PLUS 7G-TRONIC
is "every 125,000 km/5 years".
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Crankcase
16
Mechanical components
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
A die-cast aluminum crankcase with Silitec cylinder
liners is used in the new M 279 AMG.
The bore and cylinder spacing of the M 275 AMG
have been preserved. The compression ratio εis
9.0.
The crankcase and the timing case contain a
number of ducts and lines for carrying the
various media (pressurized oil, coolant, air, oil
return ducts). The crankcase is a bedplate design
with individual bolt-on main bearing caps made of
cast steel.
iNote
The engine number is impressed in the center of
the bottom of the crankcase (bedplate).
P01.40-2295-00
1 Crankcase upper section
2 Crankcase lower section (bedplate)
3Crankcasecover
4 Timing case
5 Rear crankcase cover
6 Oil filter
7Oildeflector
8Oilpan
9 Crankshaft bearing cap
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Crankcase
Mechanical components
17
Introduction of the New V12 Biturbo Engine, M 279 AMG b
Ventilation
The engine crankcase is ventilated via a centrifugal
oil separator driven by the left camshaft. An integral
pressure regulating valve provides the necessary
pressures inside the crankcase according to the
operating state (partial load or wide open throttle,
natural aspiration or forced induction) and prevents
the occurrence of excessive vacuum in the crank-
case.
The centrifugal separator is necessary because of
the high proportion of blow-by gases that occurs in
a turbocharged engine. In addition, this system
guarantees reliable oil separation under all oper-
ating conditions, even under strong acceleration or
braking, as well as during fast cornering.
Check valves in the partial-load vent line and in the
full-load vent line ensure that the gases flow in the
correct direction out of the crankcase.
The partial-load vent line opens into the charge air
distributor; the full-load ventline ends in the intake
line (damper filter) of the left turbocharger.
iNote
The connection between the full-load vent line and
the left damper filter is a plug-in connection on the
ECE version and a permanent (bonded) joint on
the USA variant.
P01.20-2303-00
Crankcase ventilation system
1 Centrifugal oil separator
2 Pressure regulating valve
3 Partial-load vent line
4 Partial-load ventilation check valve
5 Charge air distributor
6 Full-load vent line
7 Full-load ventilation check valve
8 Left damper filter
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Crankcase
18
Mechanical components
Introduction of the New V12 Biturbo Engine, M 279 AMG
b
CARB – California Air Resources Board
CARB is the clean-air agency of the state of Cali-
fornia, which proposes legislation aimed at
preventing air pollution.
According to the guidelines of this authority,
published in the California Code of Regulation
(CCR), even the crankcase ventilation system of an
internal combustion engine must satisfy special
requirements because any break in the hose or pipe
connections of the crankcase ventilation system
could result in increased hydrocarbon emissions.
For this reason all the components of the crankcase
ventilation system must be monitored electronically
by the on-board diagnosis (OBD) in order to detect
any break in the hose connections between the
crankcase, the pressure regulating valve and the
damper filter, and to log an appropriate fault code
in the fault memory.
In addition, the driver is alerted by the lighting of the
engine diagnosis indicator lamp in the instrument
cluster.
Monitoring by the OBD is not required for insepa-
rable connections and for so-called closed crank-
case ventilation systems which contain no hose or
pipe connections.
Engine M 279 AMG satisfies these requirements
with the following measures:
• The partial-load vent line (items 3 and 4) is
safeguarded by the OBD which detects any
pressure changes
• Inseparable connections are used for the
full-load vent line (items 6 and 7)
• The left damper filter (item 8) is inseparable
connected to the full-load vent line and is also
monitored by the OBD
The item numbers above refer to the illustration on
the preceding page.
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Crankcase
Mechanical components
19
Introduction of the New V12 Biturbo Engine, M 279 AMG b
Vapors loaded with oil mist coming from the crank-
case enter the centrifuge, which rotates at the
same speed as the camshaft. Here the vapors are
made to rotate, and the oil particles separate from
the gases and drip back into the crankcase. The
cleaned air flows into the pressure regulator and
depending on the operating state of the engine is
fed either directly into the charge air manifold or
into the intake line of the left turbocharger.
iNote
Even with such efficient oil separation, minute
residual quantities of oil mist pass through the
separator.
In the case of full-load ventilation, the filtered
gases are fed into the intake tract upstream of the
left turbocharger. Minute quantities of oil can
cause the compressor impeller of the turbo-
charger to turn black over time.
This is not a shortcoming or a fault!
P01.20-2304-00
Centrifugal oil separator (radial oil separator)
A Contaminated vapors
B Oil droplets
C Cleaned air
1 Pressure regulating valve
2 Centrifugal oil separator
3 Camshaft sprocket
4 Camshaft
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