light MERCEDES-BENZ G-CLASS SUV 2012 Owners Manual

Display messages Possible causes/consequences and
M Solutions
6
Restraint syst.
malfunction Con‐
sult workshop There is a malfunction in the SRS (Supplemental Restrain
tSys-
tem). The 6warning lamp also lights up in the instrumen tclus-
ter.
G WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the even tofanaccident, may not be triggered.
This poses an increased ris kofinjury.
X Visi taqualified specialist workshop.
For further information about the Supplemental Restrain tSystem,
see (Y page 39). 6
Front
left malfunc‐
tion Consult work‐
shop orFront right
malfunction Con‐
sult workshop SRS has malfunctioned at the front on the left or right. The
6
warning lamp also lights up in the instrumen tcluster.
G WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the even tofanaccident, may not be triggered.
This poses an increased ris kofinjury.
X Visi taqualified specialist workshop. 6
Rear left malfunc‐
tion Consult work‐
shop orRear right
malfunction Con‐
sult workshop SRS has malfunctioned at the rear on the left or right. The
6
warning lamp also lights up in the instrument cluster.
G WARNING
The airbags or belt tensioner smay either be triggered uninten-
tionally or, in the event of an accident, may no tbe triggered.
This poses an increased risk of injury.
X Visit a qualified specialist workshop. Display messages
233On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
6
Rear centre mal‐
function Consult
workshop SRS has malfunctioned at the rear centre. The
6warning lamp
also lights up in the instrumen tcluster.
G WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the even tofanaccident, may not be triggered.
This poses an increased ris kofinjury.
X Visi taqualified specialist workshop. 6
Left
windowbag mal‐
function Consult
workshop or
Right windowbag malfunc‐
tion Consult work‐
shop 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.
G WARNING
The left or right windowbag may either be triggered unintentionally
or, in the event of an accident, may not be triggered.
This poses an increased risk of injury.
X Visit a qualified specialist workshop. Lights
i Display messages about LEDs:
This display message will only appear if all LEDs have failed. Display messages Possible causes/consequences and
M Solutions
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
Trailer left tail
lamp or
Trailer right tail lamp The left or right-hand trailer tail lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself.
or
X Visit a qualified specialist workshop. b
Trailer left indi‐
cator or
Trailer right indicator The left or right-hand trailer turn signal lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself.
or
X Visit a qualified specialist workshop. 234
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
b
Front foglamp,
left orFront fog‐
lamp, right The left-hand or right-hand fron
tfoglamp is faulty.
X Replace the bulb (Y page 114).b
Rear fog lamp The rear foglamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 115).
or
X Visit a qualified specialist workshop. b
Front
left parking
lamp or
Front right parking lamp The front left or front right parking lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 115).
or
X Visit a qualified specialist workshop. b
Reversing light The reversing lamp is faulty.
X
Replace the bulb (Y page 114).b
Left tail
lamp orRight tail
lamp The left or right-hand tail lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 115).
or
X Visit a qualified specialist workshop. b
Left daytime driv‐
ing lamp or
Right daytime driving
lamp The left or right-hand daytime driving lamp is defective.
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. 236
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
b
Remove key You have lef
tthe key in the ignition lock.
X Remove the key from the ignition lock. 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 Ã.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 293).
X Have the coolant system checked at a qualified specialist work-
shop if the coolant needs topping up more often than usual. ? The fan motor is faulty.
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. Display messages
237On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
TC shift condition
not fulfilled
Engage NEUTRAL gear You have not met one or more shift conditions.
X
Shift the automati ctransmission to neutral position N.
X Repeat the gearshift process. TC shift condition
not fulfilled
Drive at max.
70 km/h You have exceeded the maximu
mspeed for the gearshift process.
X Drive more slowly.
X Repeat the gearshift process. LOW RANGE
On The transfer case is in the
LOW RANGEoff-road position. HIGH RANGE
On The transfer case is in the
HIGH RANGEon-road position. Differential locks
available only in
LOW RANGE The LOW RANGE button has been pressed. The transfer case is in
the
LOW RANGE off-road driving position and a differential lock
is engaged.
X Disengage the differential locks (Y page 204).
X Repeat the gearshift process. TC-NEUTRAL
On The transfer case is in the
Neutralneutral position.
Aw arning tone will also sound when the driver's door is opened
and the brake pedal is no tdepressed.
X Close the driver's door.
X Secure the vehicle against rolling away (Y page 163).
X Shift the transfer case according to driving conditions
(Y page 201). Preselected dif‐
ferential lock
ESP not available Ad
ifferential lock has been engaged. The differential gear has not
yet locked the respective differential. The activation indicator
lamp (yellow) ( Ypage 204) of the switch lights up.
ESP is unavailable.
AB Sis still available. Differential locks
active
ABS and ESP
unavailable Ad
ifferential lock was engaged and the differential gear has
locked the respective differential. The activation indicator lamp
(yellow) and function indicator lamp (red) (Y page 204) on the
switch light up.
AB Sa nd ESP are unavailable. 242
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
Blind Spot Assist
currently unavail‐
able See Owner's
Manual or
Active Blind Spot Assist currently
unavailable See
Owner's Manual Blind Spot Assis
torActive Blind Spot Assist is temporarily inop-
erative .Possible causes:
R you have established the electrical connection between the
trailer and your vehicle.
R the sensors are dirty.
R the function is impaired due to heavy rain or snow.
R the radar sensor system is outside the operating temperature
range.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
The yellow 9indicator lamps also light up in the exterior mir-
rors.
X When towing a trailer, confirm the display message with a.
If you are driving without a trailer and the display message does
not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Engage the parking brake.
X Clean the sensors (Y page 298).
X Restart the engine.
If the system detects that the sensors are fully operational, the
display message disappears.
Blind Spot Assist or Active Blind Spot Assist is operational again. Blind Spot Assist
inoperative or
Active Blind Spot Assist inoperative Blind Spot Assist or Active Blind Spot Assist is faulty.
The yellow 9indicator lamps also light up in the exterior mir-
rors.
X Visit a qualified specialist workshop. DISTRONIC PLUS
Off DISTRONIC PLUS has been deactivated (Y
page 182).
If it was deactivated automatically, a warning tone also sounds. DISTRONIC PLUS
available again DISTRONIC PLUS is operational again after having been tempo-
rarily unavailable. You can now reactivate DISTRONIC PLUS
(Y page 182). Display messages
243On-board computer and displays Z

Safety
Seat belts Problem Possible causes/consequences and
M Solutions
ü
Only for certain coun-
tries:
the red seat belt
warning lamp lights up
for six seconds after
the engine starts. The seat belt warning lamp reminds the driver and front passenger
to fasten their seat belts.
X
Fasten your seat belt (Y page 44).ü
Only for certain coun-
tries:
the red seat belt
warning lamp lights up
after the engine starts.
In addition, a warning
tone sounds for up to
six seconds. The driver's seat belt is not fastened.
X
Fasten your seat belt (Y page 44).
The warning tone ceases. ü
The red seat belt warn-
ing lamp lights up after
the engine starts, as
soon as the driver's or
the front-passenger
door is closed. The driver or front passenger has not fastened their seat belt.
X
Fasten your seat belt (Y page 44).
The warning lamp goes out. There are objects on the front-passenger seat.
X
Remove the objects from the front-passenger seat and stow
them in a secure place.
The warning lamp goes out. ü
The red seat belt warn-
ing lamp flashes and an
intermittenta udible
warning sounds. The driver or fron
tpassenger has no tfastened their seat belt .At
the same time, you are driving faste rthan 25 km/h or have briefly
driven faster than 25 km/h.
X Fasten your seat belt (Y page 44).
The warning lamp goes out and the intermittent warning tone
ceases. There are objects on the front-passenger seat. At the same time,
you are driving faster than 25 km/h or have briefly driven faster
than 25 km/h.
X
Remove the objects from the front-passenger seat and stow
them in a secure place.
The warning lamp goes out and the intermittent warning tone
ceases. 252
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Safety systems
Problem Possible causes/consequences and
M Solutions
J
The red brake system
warning lamp comes on
while the engine is run-
ning.
G
WARNING
The brake system is malfunctioning and the braking characteris-
tics may be affected.
There is a risk of an accident.
X If the multifunction display shows a display message, please
observe this.
X Drive on carefully.
X Visit a qualified specialist workshop. J
The yellow brake sys-
tem warning lamp
lights up while the
engine is running. A
warning tone also
sounds.
G
WARNING
The brake boosting effect is malfunctioning and the braking char-
acteristics may be affected.
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
under any circumstances.
X Secure the vehicle against rolling away (Y page 163).
X Consult a qualified specialist workshop.
X Observe the additional display messages in the multifunction
display. J
The yellow brake sys-
tem warning lamp
lights up while the
engine is running. A
warning tone also
sounds.
There is insufficient brake fluid in the fluid reservoir.
G WARNING
The 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
under any circumstances.
X Secure the vehicle against rolling away (Y page 163).
X Do not top up the brake fluid. Topping up will not rectify the
fault.
X Consult a qualified specialist workshop.
X Observe the additional display messages in the multifunction
display. Warning and indicator lamps in the instrument cluster
253On-board computer and displays Z

Problem Possible causes/consequences and
M Solutions
!
The red ABS warning
lamp is lit while the
engine is running.
ABS (Anti-lock Brake System) has been deactivated due to a fault.
BAS (Brake Assist), ESP
®
(Electronic Stability Program), the HOLD
function, hill start assist, the adaptive brake lights and ESP ®
trailer
stabilisation, for example, are therefore also deactivated.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The 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 a qualified specialist workshop.
If the ABS control unit is faulty, there is also a possibility that other
systems, such as the navigation system or the automatic trans-
mission, will not be available. 254
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Problem Possible causes/consequences and
M Solutions
!
The red ABS warning
lamp is lit while the
engine is running.
ABS is temporarily unavailable. BAS, ESP
®
,E BD (electronic brake
force distribution), the HOLD function, hill star tassist, ESP ®
trailer
stabilisation and the adaptive brake lights, for example, are there-
fore also deactivated.
Possible causes:
R Self-diagnosis is not yet complete.
R The on-board voltage may be insufficient.
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 a risk of an accident.
X Carefully drive on a suitable stretch of road making slight steer-
ing movements at a speed above 20 km/h.
The functions mentioned above are available againw hen 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 a qualified specialist workshop. Warning and indicator lamps in the instrument cluster
255On-board computer and displays Z