2016 MERCEDES-BENZ GLC COUPE warning light

Display messages
Possible causes/consequences and
M
MSolutions The yellow
!warning lamp lights up. If you manually apply or
release the electric parking brake, the red !indicator lamp
flashes.
The electric parking brake is malfunctioning. The electric parking
brake cannot be applied manually.
X Shift the transmission to position P, as the electric parking brake is
not applied automatically.
X Consult a qualified specialist workshop.
If it is not possible to release the electric parking brake manually:
X Release the electric parking brake automatically (Y page 169).!
Parking brake inop‐ Parking brake inop‐
erative erative The yellow
!warning lamp lights up. The red !indicator lamp
flashes for about ten seconds after the electric parking brake has been applied or released. It then goes out or remains lit.
The electric parking brake is malfunctioning, e.g. because of over-
voltage or undervoltage.
X Rectify the cause of the overvoltage or undervoltage, e.g. by charg-
ing the battery or restarting the engine.
X Apply or release the electric parking brake.
If the electric parking brake still cannot be applied or released: X Switch off the ignition and switch it back on.
X Apply or release the electric parking brake.
If the electric parking brake still cannot be released: X Consult a qualified specialist workshop.
If the electric parking brake still cannot be applied:
X Consult a qualified specialist workshop. The yellow
!warning lamp lights up and the red !indicator
lamp flashes.
The electric parking brake cannot be applied manually.
X Shift the transmission to position P.
X Consult a qualified specialist workshop. J
Check brake fluid Check brake fluid
level level There is insufficient brake fluid in the brake fluid reservoir.
In addition, the red Jwarning lamp lights up on the instrument
cluster and a warning tone sounds.
G WARNING
Braking efficiency may be impaired.
There is a risk of an accident!
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving.
X Secure the vehicle against rolling away (Y page 167).
X Consult a qualified specialist workshop.
X Do not top up the brake fluid. This does not correct the fault. 254
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions Radar
Radar
sensors
sensors dirty
dirty
See Owner's Manual
See Owner's Manual The radar sensor system is malfunctioning.
Possible causes:
R Dirt on sensors
R Heavy rain or snow
R Driving on inter-urban roads without traffic or infrastructure, e.g. in
desert-like areas
At least one driving system or driving safety system is malfunctioning
or is temporarily unavailable:
R PRE-SAFE ®
PLUS
R COLLISION PREVENTION ASSIST PLUS
R Active Lane Keeping Assist
R Active Blind Spot Assist
R DISTRONIC PLUS with Steering Assist and Stop&Go Pilot
If the front radar system sensor is dirty, Active Blind Spot Assist will
not perform a course-correcting brake application.
Once the cause of the problem is no longer present, the driving sys-
tems and driving safety systems will be available again. The display
message disappears.
If the display message does not disappear:
X Stop the vehicle, paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 167).
X Switch off the engine.
X Clean all sensors (Y page 335).
X Restart the engine.
The display message disappears. 6
Restraint sys. mal‐ Restraint sys. mal‐
function Consult function Consult
workshop workshop The restraint system is malfunctioning. The
6warning lamp also
lights up on the instrument cluster.
G WARNING
The airbags or belt tensioners may either be triggered unintentionally or, in the event of an accident, may not be triggered.
This poses an increased risk of injury!
X Consult a qualified specialist workshop immediately.
Further information about the restraint system (Y page 41).6
Front left malfunc‐ Front left malfunc‐
tion Consult work‐ tion Consult work‐
shop shop
orFront right
Front right
malfunction
malfunction Consult
Consult
workshop
workshop The front left or right restraint system is malfunctioning. The
6
warning lamp also lights up on the instrument cluster.
G WARNING
The airbags or belt tensioners may either be triggered unintentionally or, in the event of an accident, may not be triggered.
This poses an increased risk of injury!
X Consult a qualified specialist workshop immediately. Display
messages
257On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions 6
Rear left malfunc‐ Rear left malfunc‐
tion Consult work‐ tion Consult work‐
shop shop
orRear right
Rear right
malfunction
malfunction Consult
Consult
workshop
workshop The rear left or right restraint system is malfunctioning. The
6
warning lamp also lights up on the instrument cluster.
G WARNING
The airbags or belt tensioners may either be triggered unintentionally or, in the event of an accident, may not be triggered.
This poses an increased risk of injury!
X Consult a qualified specialist workshop immediately. 6
Rear Rear
centre
centre malfunc‐
malfunc‐
tion Consult work‐
tion Consult work‐
shop shop The rear centre restraint system is malfunctioning. The
6warning
lamp also lights up on the instrument cluster.
G WARNING
The airbags or belt tensioners may either be triggered unintentionally or, in the event of an accident, may not be triggered.
This poses an increased risk of injury!
X Consult a qualified specialist workshop immediately. 6
Left windowbag mal‐ Left windowbag mal‐
function Consult function Consult
workshop workshop
orRight
Right
windowbag malfunc‐
windowbag malfunc‐
tion Consult work‐ tion Consult work‐
shop shop The left-hand or right-hand windowbag is malfunctioning.
The
6 warning lamp also lights up on the instrument cluster.
G WARNING
The left-hand or right-hand windowbag may either be triggered unin-
tentionally or, in the event of an accident, not triggered at all.
This poses an increased risk of injury!
X Consult a qualified specialist workshop immediately. 258
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions Front-passenger
Front-passenger
airbag airbag
disabled
disabled See
See
Owner's Manual
Owner's Manual The front-passenger front airbag is disabled during the journey
although:
R An adult
or
R A person of the corresponding stature is on the front-passenger
seat
If additional forces are applied to the seat, the weight the system
detects may be too low.
G WARNING
The front-passenger front airbag does not deploy during an accident.
This poses an increased risk of injury!
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 167).
X Switch the ignition off.
X Have the front passenger step out of the vehicle.
X Make sure that the seat is unoccupied, close the front-passenger
door and switch on the ignition.
X Observe the PASSENGER AIR BAG indicator lamps on the centre
console and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R A self-diagnosis is carried out. The PASSENGER AIR BAG OFF and
PASSENGER AIR BAG ON indicator lamps must light up simulta-
neously for approximately six seconds
R The PASSENGER AIR BAG OFF indicator lamp must then light up
and remain lit after the self-diagnosis. If the indicator lamp is on,
the automatic front-passenger front airbag deactivation system
has disabled the front-passenger front airbag (Y page 49)
R The Front-passenger airbag enabled See Owner's Man‐
Front-passenger airbag enabled See Owner's Man‐
ual ual orFront-passenger airbag disabled See Owner's
Front-passenger airbag disabled See Owner's
Manual
Manual display messages must not appear on the multifunction
display
X Wait for a period of at least 60 seconds until the necessary system
checks have been completed.
X Make sure that the display messages do not appear on the multi-
function display.
If these conditions are met, the front-passenger seat can be occupied again. Whether the PASSENGER AIR BAG OFF indicator lamp remains lit or goes out depends on how the automatic front-passenger front
airbag deactivation system classifies the occupant.
If the conditions are not met, the system is not operating correctly.
X Consult a qualified specialist workshop immediately.
Further information on the automatic front-passenger front airbag
deactivation system (Y page 49). Display
messages
259On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Front-passenger
Front-passenger
airbag enabled See airbag enabled See
Owner's Manual Owner's Manual The front-passenger front airbag is enabled during the journey
although:
R A child, a small adult or an object weighing less than the system
weight threshold is located on the front-passenger seat
or
R The front-passenger seat is not occupied
The system may detect objects or forces that are placing additional
weight on the seat.
G WARNING
The airbag may deploy unintentionally.
This poses an increased risk of injury!
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 167).
X Switch the ignition off.
X Open the front-passenger door.
X Remove the child and child seat from the front-passenger seat.
X Make sure that no objects are present that are applying additional
weight to the seat.
The system might otherwise detect the additional weight and inter- pret the seat occupant's weight as greater than it actually is.
X Make sure that the seat is unoccupied, close the front-passenger
door and switch on the ignition.
X Observe the PASSENGER AIR BAG indicator lamps on the centre
console and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R A self-diagnosis is carried out. The PASSENGER AIR BAG OFF and
PASSENGER AIR BAG ON indicator lamps must light up simulta-
neously for approximately six seconds
R The PASSENGER AIR BAG OFF indicator lamp must then light up
and remain lit after the self-diagnosis. If the indicator lamp is on,
the automatic front-passenger front airbag deactivation system
has disabled the front-passenger front airbag (Y page 49)
R The Front-passenger airbag enabled See Owner's Man‐
Front-passenger airbag enabled See Owner's Man‐
ual ual orFront-passenger airbag disabled See Owner's
Front-passenger airbag disabled See Owner's
Manual
Manual display messages must not appear on the multifunction
display
X Wait for a period of at least 60 seconds until the necessary system
checks have been completed.
X Make sure that the display messages do not appear on the multi-
function display.
If these conditions are met, the front-passenger seat can be occupied again. Whether the PASSENGER AIR BAG OFF indicator lamp remains lit or goes out depends on how the automatic front-passenger front
airbag deactivation system classifies the occupant.
If the conditions are not met, the system is not operating correctly. 260
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions X
Consult a qualified specialist workshop immediately.
Further information on the automatic front-passenger front airbag
deactivation system (Y page 49).Lights
Display messages
Possible causes/consequences and
M
MSolutions b
Left dipped beam Left dipped beam
(Example) The bulb in question is faulty.
X Consult a qualified specialist workshop.
or X Check whether you are permitted to replace the bulb yourself
(Y page 122).
i LED light bulbs: the display message for the corresponding lamp
only appears when all the LEDs in the lamp have failed. b
Active Active
Light
LightSystem
System
inoperative
inoperative The active light function is malfunctioning.
X Consult a qualified specialist workshop. b
Intell. Light Sys‐ Intell. Light Sys‐
tem inoperative tem inoperative The Intelligent Light System is malfunctioning. The lighting system
continues to function properly without the functions of the Intelligent
Light System.
X Consult a qualified specialist workshop. b
Malfunction Malfunction
See
SeeOwn‐
Own‐
er's Manual
er's Manual The exterior lighting is faulty.
X Consult a qualified specialist workshop. Vehicles with trailer tow hitch: a fuse may have blown.
X Stop the vehicle, paying attention to road and traffic conditions.
X Secure the vehicle against rolling (Y page 167).
X Check the fuses (Y page 354).
X If necessary, replace the blown fuse. Observe the warning notes as
you do so.
If the display message remains on show:
X Consult a qualified specialist workshop. b
AUTO lights inoper‐ AUTO lights inoper‐
ative ative The light sensor is malfunctioning.
X Consult a qualified specialist workshop. b
Switch off lights Switch off lights You are leaving the vehicle and the lights are switched on. A warning
tone also sounds.
X Turn the light switch to the Ãposition. Display
messages
261On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions #
See Owner's Manual See Owner's Manual The battery is no longer being charged.
A warning tone also sounds.
Possible causes:
R faulty alternator
R torn poly-V-belt
R a malfunction in the electronics
! Do not continue driving. The engine could otherwise overheat.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X Secure the vehicle against rolling away (Y page 167).
X Consult a qualified specialist workshop. #
Stop vehicle See Stop vehicle See
Owner's Manual Owner's Manual The battery is no longer being charged and the charge status is too
low.
A warning tone also sounds.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X Secure the vehicle against rolling away (Y page 167).
X Observe the instructions in the display #See
See Owner's Owner's Manual
Manual
message.
X Consult a qualified specialist workshop. #
Stop vehicle Leave Stop vehicle Leave
engine running engine running The battery charge status is too low.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving.
X Leave the engine running.
X Wait until the display message disappears before pulling away. #
Start engine See Start engine See
Owner's Manual Owner's Manual The engine is off and the charge status is too low.
X Switch off any electrical consumers that you do not need, such as
the rear window heating and interior lighting.
X Leave the engine running for a few minutes, or drive for an extended
period.
The battery charges. 264
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions Á
Stop vehicle Vehi‐ Stop vehicle Vehi‐
cle too low cle too low You have pulled away while the vehicle level was too low.
AIR BODY CONTROL sets the vehicle to the selected level after a short
period.
X Stop the vehicle, paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 167).
X Wait until the display message disappears before pulling away. AIR BODY CONTROL is faulty. A warning tone also sounds.
X Do not drive at speeds greater than 80 km/h.
X Make only slight steering movements. Otherwise, the front wings or
the tyres could be damaged if the steering input is too great.
X Listen for scraping sounds.
X Stop the vehicle, paying attention to road and traffic conditions, and
set a higher vehicle level.
Depending on the fault, it may be possible to raise the vehicle.
X Consult a qualified specialist workshop. Á
Please reduce speed Please reduce speed You cannot change the vehicle level. Possible causes:
R You are driving too quickly for the selected vehicle level.
R You are driving too quickly with a trailer or the trailer tow hitch
socket is being used, e.g. for a rear-mounted bicycle rack
X Drive more slowly and then select the desired vehicle level again
(Y page 188).
X Observe the notes on towing a trailer (Y page 219).Á
Compressor is cool‐ Compressor is cool‐
ing ing You have selected a higher vehicle level. The compressor first needs
to cool down because of frequent level changes within a short space of time.
X Drive in a manner appropriate for the current vehicle level.
X Ensure sufficient ground clearance.
X Allow the compressor to cool down.
When the compressor has cooled down, the display message dis-
appears. The vehicle then continues rising to the selected vehicle
level. Á
Malfunction Malfunction AIR BODY CONTROL is malfunctioning. The vehicle's handling char-
acteristics may be impaired.
X Drive as appropriate for the current vehicle level, but do not exceed
80 km/h.
X Ensure sufficient ground clearance.
X Consult a qualified specialist workshop. Á
Malfunction Malfunction DYNAMIC BODY CONTROL is malfunctioning. The vehicle's handling
characteristics may be impaired.
X Do not drive at speeds greater than 80 km/h.
X Consult a qualified specialist workshop. Display
messages
267On-board computer and displays Z