RaceChip XLR User manual

User Manual
PLEASE
READ BEFORE
STARTING
INSTALLATION!
Download
the new
RaceChip+ app
bit.ly/RCplus-iOS
bit.ly/RCplus-android
MB C-Class (W/S/C204) C 220 CDI

2
1 Scope of delivery.............................................................................................................................................3
2 Installation .......................................................................................................................................................4
3 Trouble Shooting ..........................................................................................................................................11
4 Contact ...........................................................................................................................................................15
Contents
Overview and explanation of symbols
Warnings and important information – please read!
General information on installation and use
Tips to assist installation and use

User Manual
PLEASE
READ BEFORE
STARTING
INSTALLATION!
Download
the new
RaceChip+ app
bit.ly/RCplus-iOS
bit.ly/RCplus-android
3
1 Scope of delivery
Brainbox
Fasteners
User Manual
Speci cally modi ed to suit your car.
Material to  x the Brainbox in place.
Installation and operation.

4
2 Installation
Step 1 of 5 – Preparation
Open the driver’s door as far as possible.
Remove any mats and move the driver’s seat all the way back.
Switch the ignition off, remove the key.
Ensure the footwell is properly illuminated with an inspection lamp.
Wait about 10 minutes before starting Step 2, as all current consumers must have
switched themselves off.
• For cars with “Keyless Go”: after locking the car, place the key out of signal range
(about 10 m from the car).
• If an alarm system is tted: disable the alarm before starting installation.
1
2
3
4
5

5
2 Installation
Step 2 of 5 – Disconnect throttle pedal sensor
There are two types of throttle pedal: fl oor-mounted or hanging. We’ll explain how to disconnect
the throttle pedal sensor for both types.
A. Floor-mounted throttle pedal B. Hanging throttle pedal
If you need assistance in detaching the throttle pedal sensor connector: see the
additional instructions “Detaching the connector correctly”.
B1
You might have to remove part of the
trim to get to the connector.
OR
Throttle pedal sensor
• The throttle pedal sensor is on the right-
hand side of the throttle pedal. Carefully
pull off the connector of the throttle pedal
sensor.
A2
Throttle pedal sensor
A1
Throttle pedal sensor
Throttle pedal sensor
B2
• Disassemble the throttle pedal with the
appropriate tools.
• The throttle pedal sensor is at the top of
the throttle pedal. Carefully pull off the
connector of the throttle pedal sensor.

B
A
A B
6
2 Installation
Step 3 of 5 – Connect the Brainbox
The car used to illustrate these instructions is for demonstration purposes only. The basic proce-
dure is exactly the same even if the details of your car look different.
• The cable leading from the Brainbox has
two connectors (marked Aand B).
• Attach connector A from the Brainbox to
the gas pedal sensor.
• Now attach connector B to the connector
you pulled off the gas pedal.
A sharp click indicates that the
retaining clip has engaged fully.
A sharp click indicates that the
retaining clip has engaged fully.
1 2
3 4 Only if the throttle pedal
has been disassembled:
• Re-assemble the throttle pedal.
• Make sure the cable is not trapped and
does not interfere with the pedals.
• Ensure the throttle pedal is  rmly  xed in
the proper position.
A
B

7
2 Installation
Step 4 of 5 – Fix the Brainbox
We recommend two places for fi xing the Brainbox (although there may be other possibilities):
A. On the left of the footwell next
to the footrest.
• Fix one part of the hook-and-eye fastener
tape to the bottom of the Brainbox.
• Fix the other part of the fastener tape to
the site indicated in the footwell. Make sure
the site is free of dust and grease  rst.
• Now press the two halves of the fastener
together (see picture for Brainbox position).
• First test carefully to see if the Brainbox will
 t under the trim.
• If the Brainbox  ts, slide it carefully under
the trim into the position shown.
B. Under the trim on the centre tunnel
Secure the Brainbox and its wiring so that they do not interfere with the pedals and
cannot slide into the footwell.
1x hook-and-
loop fastener
hook-and-loop
fastener
OR
Brainbox
A1 B1
Brainbox

8
2 Installation
A. On the left of the footwell next
to the footrest
B. Under the trim on the centre tunnel
• Use the cable clips and/or cable ties to secure the cable between the Brainbox and the
gaspedal, ensuring that nothing interferes with the pedals.
2x cable clips 4x cable ties
cable clips
A2
cable clips
B2

9
2 Installation
Step 5 of 5 – Pair RaceChip XLR with your smartphone
Download the free RaceChip+ app.
Open the RaceChip+ app.
Switch on the ignition of your car. Do not start the engine.
With opening the RaceChip+ app for the  rst time, the
installation dialogue for chip tuning by RaceChip is shown.
Touch ADD PRODUCT and follow the instructions given by
your smartphone.
According to your operating system (Android and Apple), the steps for connecting the RaceChip
and your smartphone may vary. Please  nd the most important steps below. In general, you
should follow the instructions given by your smartphone for the connection.
Activate the Bluetooth function of your smartphone.
• The connection between the RaceChip and your smartphone is set up in the last step
of the installation process.
• The RaceChip is fully functional even if there is no connection to a smartphone
running the RaceChip+ app.
• The RaceChip XLR is now in the factory setting SPORT after  rst pairing.
1
2
4
5
3

7
10
2 Installation
6You can enter the serial number by hand (touch MANUALLY) or with the barcode scanner
of the camera (touch
You can enter the serial number by hand (touch
). Con rm the entry with NEXT.
As soon as the connection is set up, the installation is completed.
Having trouble with connecting RaceChip XLR and your phone’s Bluetooth?
Follow these steps one by one until the pairing is complete:
1. Check that the car’s ignition is switched on.
2. Check that the Bluetooth function on your smartphone is fully activated.
3. Deactivate and then re-activate the Bluetooth connection. Check if RaceChip
and your phone will pair now.
4. Re-start the RaceChip+ app.
5. Go to your smartphone’s settings and view all discoverable Bluetooth devices. If
your RaceChip (RC XLR) is not visible, please contact our customer service.
The 13-digit serial number is located on the
cover of your user manual (paper version).
Alternative you can also  nd the serial number
on the housing of the Brainbox. The Bluetooth
PIN consists of the last 6 digits of the serial
number.
Serial number
Bluetooth-PIN
Example:

11
3 Trouble Shooting
If your RaceChip XLR doesn’t function as it should, here are some trouble shooting tips.
Check engine warning
light
(also preheat warning
light on diesel engines
)
remains on after
installation
• Switch off the engine and remove the key. Check that all
connectors are engaged.
• If the problem persists after restarting the engine, contact
our Customer Service.
No/poor throttle
response, or engine
responds with
interruptions
• De-install the Brainbox of RaceChip XLR.
• Return your car to stock tuning by reconnecting the stock
pedal sensor directly with the throttle pedal.
• Check the throttle response, with the car stationary at rst
and then on an empty road. If the throttle response is still
bad or patchy, we recommend not driving the car. The
problem is probably not caused by RaceChip XLR but by a
malfunction in a component in the throttle pedal.
Car is jerky at constant
throttle
• First check to see if the jerkiness occurs in all tuning stages
or only certain ones.
• When you have done this, please contact our Customer
Service and give us as much detail as possible. We can help
you much better if you give us precise information.
• Please do not activate RaceChip XLR in your car until we
have found a solution.
Automatic gearbox
changes gear jerkily No
pairing between
• First check to see if the jerkiness occurs in all tuning stages
or only in certain ones.
• When you have done this, please contact our Customer
Service and give us as much detail as possible. We can help
you much better if you give us precise information.
• Move your car only with deactivated RaceChip XLR until the
problem is solved.
Description of problem What to do

12
3 Trouble Shooting
Description of problem What to do
Revs too high at idle
running
• Please de-install the Brainbox of RaceChip XLR.
• Return your car to stock tuning by reconnecting the stock
pedal sensor directly with the throttle pedal.
• Check the revs at idle running again. If they are still too high,
we recommend not driving the car. The problem is probably
not caused by RaceChip XLR but by a malfunction of a
component in the throttle pedal.
• Please contact our Customer Service. Based on the
information you give us, we will help to nd a solution and
tell you whether you need to take your car to a specialist.
Car does not start • Switch off the ignition and remove the key. Check that all
the connectors are securely engaged.
• Please make a note of this information and contact our
Customer Service.
• If the problem occurs when you rst install RaceChip XLR,
please de-install the Brainbox completely. There may be
a problem in the system caused by residual current in the
throttle pedal when you unplugged it. To reset the system,
lock the car and leave it for at least 30 minutes before
trying to start it again. If the engine still does not start, the
car’s fault memory must be reset (any professional garage
or repair shop can do this). Once this has been done, you
can repeat the Brainbox installation. Make sure that the
ignition is off and that you wait at least 10 minutes before
disconnecting the throttle pedal.
Connectors do not t or
do not click securely into
place
• Check that you are trying to connect the correct pair of
connectors and that they are correctly aligned.
• The connectors should t together easily – don’t force
them.
• If the connectors are incompatible, please take a picture of
the connector on the throttle pedal in your car and contact
our Customer Service.

13
3 Trouble Shooting
Description of problem What to do
The response is the
same as in stock
condition. (a sudden
loss of the Bluetooth
connection may be an
indication of this error).
• RaceChip XLR detected a problem with signal transmission
and went into its safe mode.
• This also disables the pairing between the RaceChip+ App
and your smartphone. As long as the safe mode is enabled,
no tuning modes can be selected using the RaceChip+ App.
• This means your car is now in stock tune and can be
driven. However, we recommend that you do not ignore the
problem for a long period.
• Please contact our Customer Service.
• If the problem did not occur immediately after you installed
RaceChip XLR, it could be caused by a malfunction in the
throttle pedal or in another related assembly (i.e. RaceChip
is not the cause). In this case, please take the car to a
specialist workshop.
No pairing between
RaceChip App and
RaceChip XLR possible
after updates of the
operating system on
your smartphone
• Shut down the RaceChip+ App (iOS: iOS: push the home
button twice and close the RaceChip+ App; Android: Open
the task manager and close the RaceChip+ App) and re-
start it again.
• Please contact our Customer Service if the issue still exists.

14
3 Trouble Shooting
Trouble Shooting What to do
No pairing between
RaceChip+ App and
RaceChip XLR possible
• - Check that the Bluetooth function on your smartphone is
fully activated.
- Deactivate and then re-activate the Bluetooth connection.
Check if RaceChip XLR and your phone will pair now.
- Deactivate the Bluetooth connection and completely
shut down the RaceChip+ App (iOS: push the home button
twice and close the RaceChip+ App; Android: Open the
task manager and close the RaceChip+ App). Activate the
Bluetooth connection and open the RaceChip+ App again.
- Go to your smartphone’s settings and view all discoverable
Bluetooth devices. Select “RaceChip XLR” to pair your
smartphone with the RaceChip XLR. In case no connection
is established, delete “RaceChip XLR” from the list of
discoverable Bluetooth devices. Try pairing again.
- Re-start the installation dialogue of the RaceChip+ App.
Make sure you have entered the correct Bluetooth pin (see
Step 4 of the Installation).
- Please contact our Customer Service if the issue still exists.
• Case 2 (functionality and installation issue):
- Switch off the ignition of your car and remove the key (follow
Step 1 of the Installation).
- Check that all connectors are engaged and that the
installation (see Installation) has been completed correctly.
- Please shut down the RaceChip+ App on your smartphone
now (iOS: push the home button twice and close the
RaceChip+ App; Android: Open the task manager and close
the RaceChip+ App)

15
4 Contact
Our Customer Service is ready to help!
Find out how to contact us at:
www.racechip.com/service-support
Please have your customer details close by when
you contact us.
RaceChip Chiptuning GmbH & Co. KG
Karl-Frasch-Str. 14
73037 Göppingen
Germany
Sales tax identi cation number: DE 260672432
Registered at District Court of Ulm: HRA 721734
Tax number: 63079/11153
Personally liable partner:
RaceChip Chiptuning Verwaltungs GmbH
Chief executives: Dirk Bongardt, Kai Döhler
Head of ce: Karl-Frasch-Str. 14, 73037 Göppingen, Germany
Registered at HRB District Court of Ulm: HRB 724254
Follow us on:
Legal notice
Item number: EBA-ALLG-XLR-APPONLY-EN-V1
@racechipchiptuning
/racechipchiptuning

Locking clip
Locking clip
Locking clip
Detaching the connector correctly
In the rst step, the red locking clip is pulled out. Press the red locking clip,
which functions as a lever for loosening the plug and pulling it out.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.
The plugs are locked into the connection sockets by means of a locking
clip. Press the locking clip and pull the plug.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.
The rst step involves pulling out the bright grey locking clip. Press down
on the bright grey locking clip, which serves as a switch for releasing and
removing the plug.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on in.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.

Locking clip
Locking clip 1
Locking clip 1
Locking clip 2
Locking clip 2
Detaching the connector correctly
The plugs are locked into the connection sockets by means of a locking
clip. Press the locking clip and pull the plug.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.
In the rst step, the orange locking clip 1 is pulled out. Press the black
locking clip 2, which functions as a lever for loosening the plug and pulling
it out.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.
In the rst step, the red locking clip 1 is pulled out. Press the black locking
clip 2, which functions as a lever for loosening the plug and pulling it out.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.
1
2
1
2

Locking clip
Locking clip
Locking clip
Detaching the connector correctly
In the rst step, the grey locking clip is pulled out. Press the grey locking
clip, which functions as a lever for loosening the plug and pulling it out.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.
In the rst step, the grey locking clip is pulled out. Press the grey locking
clip, which functions as a lever for loosening the plug and pulling it out.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.
The plugs are locked into the connection sockets by means of a locking
clip. Press the locking clip and pull the plug.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.

Locking clip
Locking clip
Locking clip
1
2
1
2
Detaching the connector correctly
The plugs are locked into the connection sockets by means of a locking
clip. Pull slightly the locking clip and pull the plug.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.
The plugs are locked into the connection sockets by means of a locking
clip. Press the locking clip and pull the plug.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.
In the rst step, the orange locking clip is pulled out. Press the orange
locking clip, which functions as a lever for loosening the plug and pulling it
out.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.

1
2
Detaching the connector correctly
The plugs are locked into the connection sockets by means of a locking
clip. Press the locking clip and pull the plug.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.
The plugs are locked into the connection sockets by means of a locking
clip. Press the locking clip and pull the plug.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on it.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.
The rst step involves pulling out the bright grey locking clip. Press down
on the bright grey locking clip, which serves as a switch for releasing and
removing the plug.
Because the plug is often connected very tightly to the socket, it is
helpful, when pressing the locking clip, to rst push the plug towards the
connection socket before subsequently pulling on in.
In addition, temperature uctuations in the engine bay can result in a type
of “vacuum effect” between the plug and the socket. This can be solved by
lightly “wiggling” the plug.
Locking clip
Locking clip
Locking clip