2011 MERCEDES-BENZ CLS COUPE display

Display messages Possible causes/consequences and
M Solutions
G
Risk of injury
Vehicles with automati cchild seat recognition on the front-
passenger seat: the automatic child seat recognition sensor is
faulty.
X Visit a qualified specialist workshop. 6
Restraint
sys. mal‐
function Consult
workshop G
Risk of injury
There is a malfunction in the SRS (Supplemental Restraint Sys-
tem). The 6warning lamp also lights up in the instrumentc lus-
ter.
X Visit a qualified specialist workshop. 6
Front
left malfunc‐
tion Consult work‐
shop
or
Front right mal‐
function Consult
workshop G
Risk of injury
SRS has malfunctione dat the front on the left or right. The 6
warning lamp also lights up in the instrument cluster.
X Visi taqualified specialist workshop. 6
Rear left malfunc‐
tion Consult work‐
shop
or
Rear
right malfunc‐
tion Consult work‐
shop G
Risk of injury
SRS has malfunctioned at the rear on the left or right. The 6
warning lamp also lights up in the instrument cluster.
X Visit a qualified specialist workshop. 6
Left
windowbag mal‐
function Consult
workshop
or
Right windowbag
malfunction Con‐
sult workshop G
Risk of injury
There is a malfunction in the left-hand and/or right-hand window-
bag. The 6warning lamp also lights up in the instrument clus-
ter.
X Visit a qualified specialist workshop. 218
Display messagesOn-board computer and displays

Brakes
Display messages Possible causes/consequences and
M Solutions
!÷
currently unavail‐
able See Owner's
Manual G
Ris
kofa ccident
ABS (Anti-lock Braking System), ESP ®
(Electronic Stability Pro-
gram), BA S(Brake Assist), PRE-SAFE ®
, the HOLD function and hill
star tassist are temporarily unavailable.
The adaptive brake lights, BAS PLUS and PRE-SAFE ®
Brake may
also have failed.
In addition, the ÷,åand! warning lamps light up in
the instrument cluster.
The self-diagnosis function might not be complete, for example.
ATTENTION ASSIST is deactivated.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
X Carefully drive on a suitable stretch of road, making slight steer-
ing movements, at a speed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X Drive on carefully.
X Visit a qualified specialist workshop. G
Risk of accident
ABS, ESP ®
, BAS, PRE-SAFE ®
, the HOLD function and hill start
assist are temporarily unavailable.
The adaptive brake lights, BAS PLUS and PRE-SAFE ®
Brake may
also have failed.
In addition, the ÷,åand! warning lamps light up in
the instrument cluster.
For example, the on-board voltage may be insufficient.
ATTENTION ASSIST is deactivated.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
X Drive on carefully.
If the display message disappears, the functions mentioned
above are available again. Display messages
219On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
If the display message continues to be displayed:
X
Drive on carefully.
X Visit a qualified specialist workshop. !÷
inoperative See
Owner's Manual G
Risk of accident
ABS, ESP ®
, BAS, PRE-SAFE ®
, the HOLD function and hill start
assist are no tavailable due to a malfunction.
The adaptive brake lights, BAS PLUS and PRE-SAFE ®
Brake may
also have failed.
In addition, the J,÷,åand! warning lamps light
up in the instrument cluster.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
ATTENTION ASSIST is deactivated.
X Drive on carefully.
X Visi taqualified specialist workshop immediately. T!
÷
inoperative See
Owner's Manual G
Risk of accident
EBD (Electronic Brake force Distribution), ABS, ESP ®
, BAS, PRE-
SAFE ®
, the HOLD function and hill start assist are not available
due to a malfunction.
The adaptive brake lights, BAS PLUS and PRE-SAFE ®
Brake may
also have failed.
In addition, the ÷,åand! warning lamps in the instru-
ment cluster light up and a warning tone sounds.
ATTENTION ASSIST is deactivated.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. J
Release parking
brake You are driving with the parking brake applied.
Awarning tone also
sounds.
X Release the parking brake 220
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
J
Check brake fluid
level G
Risk of accident
There is insufficien tbrake fluid in the brake fluid reservoir. In addi-
tion, the red Jwarning lamp in the instrument cluster lights
up and a warning tone sounds.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Apply the parking brake.
X Consult a qualified specialist workshop.
X Do not top up the brake fluid. This does not correct the error. #
Check brake wear The brake pads/linings have reached their wearl
imit.
X Visit a qualified specialist workshop. Lights
i Display messages about LEDs:
This display message will only appear if all LEDs have failed. Displa
ymessages Possible causes/consequences and
M Solutions
b
Left cornering
light
or
Right cornering
light The left or right-hand cornering light is faulty.
X
Visit a qualified specialist workshop. b
Left dipped beam
or
Right dipped beam The left or right-hand dipped-beam headlamp is faulty.
X
Visit a qualified specialist workshop. b
Rear
left indicator
or
Rear right indica‐
tor The rear left-hand or rear right-hand tur
nsignal is faulty.
X Visit a qualified specialist workshop. Display messages
221On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
b
Front left indica‐
tor
or
Front
right indica‐
tor The front left-hand or front right-hand turn signal is faulty.
X
Visit a qualified specialist workshop. b
Left
mirror indica‐
tor
or
Right mirror indi‐
cator The turn signal in the left-hand and/or right-hand exterior mirror
is faulty.
X
Visit a qualified specialist workshop. b
Third brake lamp The third brake lamp is faulty.
X
Visit a qualified specialist workshop. b
Left-hand tail
lamp/brake lamp
or
Right-hand tail
lamp/brake lamp The lef
torright-hand tail lamp/brake lamp is faulty.
X Visit a qualified specialist workshop. b
Left main beam
or
Right main beam The left or right-hand high beam is faulty.
X
Visit a qualified specialist workshop. b
Rear left fog lamp
or
Rear
right fog lamp The rear foglamp is faulty.
X
Visit a qualified specialist workshop. b
Front
left parking
lamp
or
Front right park‐
ing lamp The front left or front right parking lamp is faulty.
X
Visit a qualified specialist workshop. 222
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
b
Left revers. lamp
or
Right revers. lamp The lef
torright-hand reversing lamp is faulty.
X Replace the bulb (Y page 104).
or
X Visit a qualified specialist workshop. b
Left daytime driv‐
ing lamp
or
Right
daytime driv‐
ing lamp The left or right-hand daytime driving lamp is defective.
X
Visit a qualified specialist workshop. b
Intell. Light Sys‐
tem inoperative The Intelligent Light System is faulty. The lights remain available
without the Intelligent Light System.
X
Visit a qualified specialist workshop. b
Malfunction See
Owner's Manual The exterior lighting is faulty.
X
Visit a qualified specialist workshop. b
AUTO
lights inoper‐
ative The light sensor is faulty.
X
Visit a qualified specialist workshop. b
Switch off lights The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
X
Turn the light switch to c.Adaptive Main-beam
Assist inoperative Adaptive Highbeam Assist is faulty.
X
Visit a qualified specialist workshop. Adaptive Main-beam
Assist currently
unavailable See
Owner's Manual Adaptive Highbeam Assist is deactivated and temporarily inoper-
ative if:
R
the windscreen is dirty in the camera's field of vision.
R visibility is impaired due to heavy rain, snow or fog.
X Clean the windscreen.
Adaptive Highbeam Assist is available again if:
R the dirt (e.g .slush) drops away while the vehicle is in motion.
R the system detects that the camera is fully operational again.
The Adaptive Main-beam Assist available again message
is displayed. Display messages
223On-board computer and displays Z

Engine
Display messages Possible causes/consequences and
M Solutions
+
Top
up coolant See
Owner's Manual The coolant level is too low.
X
Top up the coolant, observing the warning notes before doing
so (Y page 268).
X If the coolant needs topping up more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop. ?
Coolant Stop vehi‐
cle Switch engine
off The coolant is too hot.
X
Pull ove rand stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Make sure tha tthe air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Wait until the display message disappears before restartingt he
engine. Otherwise, there is a risk of engine damage.
X Pay attention to the coolant temperature display.
X If the temperature increases again, visit a qualified specialist
workshop immediately. The poly-V-belt may have torn.
X
Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Open the bonnet.
X Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! do not continue driving. The engine could otherwise overheat.
X Consult a qualified specialist workshop.
If the poly-V-belt is OK:
X Wait until the display message disappears before restartingt he
engine. Otherwise, there is a risk of engine damage.
X Pay attention to the coolant temperature display.
X Visit a qualified specialist workshop. ? The fan motor is faulty.
X
If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in moun-
tainous terrain, and stop-start driving. 224
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
# The battery is no
tbeing charged.
Possible causes are:
R a faulty alternator
R a torn poly-V-belt
R a malfunction in the electronics
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Open the bonnet.
X Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! do not continue driving. The engine could otherwise overheat.
X Consult a qualified specialist workshop.
If the poly-V-belt is OK:
X Visit a qualified specialist workshop. 4
Check eng. oil
lev. when next
refuelling The engine oil level has dropped to a critical level.
Aw
arning tone also sounds.
X Chec kthe oil level (Y page 267).
X If necessary, top up the engine oil (Y page 268).
X Have the engine checked for leaks if the engine oil needs top-
ping up more often than usual. 8
Reserve fuel level The fuel level has dropped into the reserve range.
Operation of the auxiliary heating is deactivated when the fuel level
drops into the reserve range.
X
Refuel at the nearest filling station. C There is only a very small amount of fuel in the fuel tank.
The auxiliary heating cannot be operated.
X
Refuel at the nearest filling station without fail. ¸
Replace
air cleaner Vehicles with a diesel engine: the engine air filter is dirty and must
be replaced.
X
Visit a qualified specialist workshop. !
Clean
the fuel fil‐
ter Vehicles with a diesel engine: there is water in the fuel filter. The
water must be drained off.
X
Visit a qualified specialist workshop. Display messages
225On-board computer and displays Z