2012 MERCEDES-BENZ CLS COUPE warning lights

Problem Possible causes/consequences and
M Solutions
!
The yellowA
BS warning
lamp is lit while the
engine is running. ABS is temporarily unavailable. Therefore, BAS,B
AS PLUS, ESP®
,
EBD (electronic brake force distribution), PRE-SAFE ®
,
PRE-SAFE ®
Brake, the HOLD function, hill start assist and the
adaptive brake lights, for example, are also deactivated.
Possible causes:
R Self-diagnosis is not yet complete.
R the on-board voltage may be insufficient.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The front and rear wheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is arisk of an accident.
X Carefullyd rive onasuitable stretch of road, making slight steer-
ing movements, at aspeed above 20 km/h.
The functions mentioned above are available again when the
warning lamp goes out.
If the warning lamp is still on:
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Visit aqualified specialist workshop. 262
Warning and indicator lampsint
he instrument clusterOn-board computer and displays

Problem Possible causes/consequences and
M Solutions
!
The yellowA
BS warning
lamp is lit while the
engine is running. A
warning tone also
sounds. EBD is not available due to
amalfunction .Therefore, ABS,B AS,
BAS PLUS, ESP ®
,P RE-SAFE ®
,P RE-SAFE ®
Brake, the HOLD func-
tion, hill start assist and the adaptive brake lights, for example,
are not available either.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The front and rear wheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
The danger of skidding and having an accident increases.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Visit aqualified specialist workshop. J֌!
The red brake warning
lamp, the yellow ESP
®
and ESP ®
OFF warning
lamps and the yellow
ABS warning lamp are
lit while the engine is
running. ABS and ESP
®
are not available due to afault. Therefore, BAS,B AS
PLUS, EBD,P RE-SAFE®
,P RE-SAFE ®
Brake ,the HOLD function ,hill
start assist and th eadaptive brak elights ,for example, are not
available either.
ATTENTION ASSIST is deactivated.
G WARNING
The brak esystem continues to function normally, but without the
function slisted above. The fron tand rea rwheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
The danger of skidding and having an accident increases.
X Observe the additional displaym essages in the multifunction
display.
X Drive on carefully.
X Visit aqualified specialist workshop. Warning and indicator lampsint
he instrument cluster
263On-board computer and displays Z

Problem Possible causes/consequences and
M Solutions
֌
The yellowE
SP®
and
ESP ®
OFF warning
lamps are lit while the
engine is running. ESP
®
,B AS,B AS PLUS, PRE-SAFE ®
,P RE-SAFE ®
Brake, the HOLD
function, hill start assist and the adaptive brake lights are not
available due to amalfunction.
ATTENTION ASSIST is deactivated.
G WARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance in an emergency braking situation can thus
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
The danger of skidding and having an accident increases.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Visit aqualified specialist workshop. ֌
The yellowE
SP®
and
ESP ®
OFF warning
lamps are lit while the
engine is running. ESP
®
,B AS, PRE-SAFE ®
,t he HOLD functio nand hill start assist are
temporaril yunavailable.
The adaptive brake lights ,BAS PLU Sand PRE-SAFE ®
Brake may
also have failed.
ATTENTIO NASSIST is deactivated.
Self-diagnosi sisnot yetcomplete.
G WARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance in an emergenc ybraking situation can thus
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
The danger of skidding and having an accident increases.
X Carefully drive on asuitable stretch of road, making slight steer-
ing movements at aspeed above 20 km/h.
The functions mentioned above are available again when the
warning lamp goes out.
If the warning lamp is still on:
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Visit aqualified specialist workshop. Warning and indicator lampsint
he instrument cluster
265On-board computer and displays Z

Problem Possible causes/consequences and
M Solutions
J
The red brake system
warning lamp comes on
while the vehicle is
moving.
Awarning tone
also sounds. You are driving with the parking brake applied.
X
Release the parking brake.
The warning lamp goes out and the warning tone ceases. 6
The red SRS warning
lamp is lit while the
engine is running.
There is
amalfunction in the SRS (Supplemental Restraint Sys-
tem).
G WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the event of an accident, may not be triggered.
This poses an increased risk of injury.
X Drive on carefully.
X Have SRS checked at aqualified specialist workshop immedi-
ately.
For further information about the Supplemental Restraint System,
see (Y page 41). Engine
Problem Possible causes/consequences and
M Solutions
;
The yellowe
ngine diag-
nosticsw arning lamp
lights up while the
engine is running. There may be
afault, for example:
R in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignition system (for vehicles with petrol engines)
R in the fuel system
The emission limit values may be exceeded and the engine may
be running in emergency mode.
X Have the vehicle checked as soon as possible at aqualified
specialist workshop. Vehicles with
adiesel engine: the fuel tank has been run dry
(Y page 158).
X Start the engine three to four times after refuelling.
If the yellow engine diagnostics warning lamp goes out, emer-
gency running mode is cancelled. The vehicle need not be
checked. 266
Warning and indicator lampsint
he instrument clusterOn-board computer and displays

Problem Possible causes/consequences and
M Solutions
8
The yellowr
eserve fuel
warning lamp lights up
while the engine is run-
ning. The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated if the fuel level
drops into the reserve range.
X
Refuel at the nearest filling station. ?
The red coolant warn-
ing lamp lights up while
the engine is running
and the coolant tem-
perature gauge is at the
start of the scale.
The temperature sensor for the coolant temperature gauge is
faulty.
The coolant temperature is no longer being monitored. There is a
risk of engine damage if the coolant temperature is too high.
X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away (Y page 159).
X Consult aqualified specialist workshop. Warning and indicator lampsint
he instrument cluster
267On-board computer and displays Z

Problem Possible causes/consequences and
M Solutions
X
Leave the vehicle and keep asafe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and top up the coolant, observing the
warning notes (Y page 299).
X If you have to top up the coolant frequently, have the engine
cooling system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X If the coolant temperature is below 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-start traffic. Driving systems
Problem Possible causes/consequences and
M Solutions
·
The red distance warn-
ing lamp lights up while
the vehicle is in motion.
The distance to the vehicle in front is too small for the speed
selected.
X
Increase the distance. ·
The red distance warn-
ing lamp lights up while
the vehicle is in motion.
Aw
arning tone also
sounds. You are approaching
avehicle or astationar yobstacle in your line
of travel at to ohigh aspeed.
X Be prepared to brak eimmediately.
X Pay careful attentio ntothetraffic situation. You may have to
brak eort akee vasive action.
Further informatio nonDISTRONICPLUS(Ypage 170).
Further informatio nonPRE-SAFE ®
Brake (Y page 68). Warning and indicator lamps in th
einstrumen tcluster
269On-boar dcomputer and displays Z

X
Remove th emobile phone bracke tfrom
sliding adapter :;see the separate mobile
phone bracket fitting instructions.
X Detach sliding adapter :using suitable
tool =and remove. Garage door opener
Important safety notes The HomeLink
®
garage door opener integra-
ted in the rear-view mirror allows you to oper-
ate up to three different door and gate sys-
tems.
i The garage door opener is only available
for certain countries. Observe the legal
requirements for each individualc ountry.
The HomeLink ®
garage door opener is
compatible with most European garage and
gate opener drives. More information on
HomeLink ®
and/or compatible products is
available from:
R at aq ualified specialised workshop
R the HomeLink ®
hotline
(0) 08000 466 354 65 (free of charge )or
+49 (0) 6838 907 277 (charges apply)
R on the Internet at:
http://www.homelink.com
Programming Programming buttons
G
WARNING
Only press the button on the integrated
garage door opene rifthere are no persons or
objects present within the sweep of the
garage door. Persons could otherwise be
injured as the door moves. Integrated garage door opener in the rear-view mir-
ror
Garage door remote control Ais not part of
the integrated garage door opener.
X Before programming for the first time, clear
the memory of the integrated garage door
opener (Y page 289).
X Turn the key to position 2in the ignition
lock.
X Press and hold one of buttons ;to? on
the integrated garage door opener.
After ashort time, indicator lamp :lights
up yellow.
i Indicator lamp :lights up yellow as soon
as button ;,=or? is programmed for
the first time. If the selected button has
alreadyb een programmed, indicator
lamp :will only light up yellow after ten
seconds have elapsed.
X Release button ;,=or?.I ndicator
lamp :flashes yellow.
X Point garage door remote control A
towards buttons ;to? on the rear-view
mirror at adistance of 5to 20 cm.
i The required distance between remote
control Aand the integrated garage door
opener depends on the garage door drive
system. Several attemptsm ay be required.
You should test every positio nfor at least
25 seconds before trying another position. Features
287Stowing and features Z

R
Vehicles with akey:
do not remove the key from the ignition
lock. Do not open the driver's door or
front-passenger door when the engine is
switched off. Otherwise, the automatic
transmission selects park position P
automatically and locks the wheels. You
can prevent this by shifting the auto-
matic transmission to Nbeforehand.
R Vehicles with KEYLESS-GO:
do not open the driver's door or front-
passenger door when the engine is
switched off. Otherwise, the automatic
transmission selects park position P
automatically and locks the wheels.
Observe the following to make sure that the
automatic transmission stays in position N:
X Make sure the vehicle is stationary and the
ignition is switched off.
X Turn the key to position 2(Ypage 141) in
the ignition lock.
Use the key instead of the Start/Stop but-
ton on vehicles with KEYLESS-GO.
X Depress and hold the brake pedal.
X Shift the automatic transmission to posi-
tion N.
X Release the brake pedal.
X Release the electric parking brake.
X Switch off the ignition and leave the key in
the ignition lock.
You can wash the vehicle in an automatic car
wash from the very start.
Wash off excess dirt before cleaning the vehi-
cle in an automatic car wash.
After using an automatic car wash, wipe off
wax from the windscreen and the wiper
blades. This will prevent smears and reduce
wiping noises caused by residueont he wind-
screen.
Washing by hand In some countries, washing by hand is only
allowed at specially equipped washing bays. Observe the legal requirements for each indi-
vidual country.
X Do not use hot water and do not wash the
vehicle in direct sunlight.
X Use asoft sponge to clean.
X Use amild cleaning agent, such as acar
shampoo approved by Mercedes-Benz.
X Thoroughly hose down the vehicle with a
gentle jet of water.
X Do not point the water jet directly towards
the air inlet.
X Use plenty of water and rinse out the
sponge frequently.
X Rinse the vehicle with clean water and dry
thoroughly with achamois.
X Do not let the cleaning agent dry on the
paintwork.
When using the vehicle in winter, remove all
traces of road salt deposits carefully and as
soon as possible.
High-pressure cleaninge quipment G
WARNING
Do not use high-pressure cleaners with circu-
lar-jet nozzles (dirt grinders) to clean your
vehicle, in particular the tyres. You could oth-
erwise damage the tyres and cause an acci-
dent.
! Always maintain adistance of at least
30 cm between the vehicle and the high-
pressure cleaner nozzle. Information about
the correct distance is available from the
equipment manufacturer.
Move the high-pressure cleaner nozzle
around when cleaning your vehicle.
Do not aim directly at any of the following:
R tyres
R door gaps, roof gaps, jointse tc.
R electrical components
R battery
R connectors
R lights 302
CareMaintenance and care