MERCEDES-BENZ GL SUV 2012 Owners Manual

Displa
ymessages Possible causes/consequences and
M Solutions
h
Ty
re pressure Cau‐ tio
nT yrem alfunc‐ tion Th
et yrep ressur eino neor mor etyres has dropped suddenly.
Aw arning ton ealso sounds.
G WARNING
If you driv ewithaf lat tyre, there is arisk of the following hazards:
R Af lat tyre affects the ability to steer or brake the vehicle.
R You could lose control of the vehicle.
R Continued drivin gwithaflat tyre will cause excessive heat build-
up and possibly afire.
There is arisk of an accident.
X Stop the vehicle without makin gany sudden steering or braking
manoeuvres .Pay attention to the traffic conditions as you do
so.
X Secure the vehicle against rolling away (Y page 181).
X If there is aflat tyre, inspect the tyres (Y page 378).h
Tyre pressure
Chec
ktyre(s) Th
et yre pressure in one or more tyres has droppe dsignificantly.
G WARNING
With tyre pressures which are too low, there is arisk of the fol-
lowing hazards:
R they may burst, especiall yasthe load and vehicle speed
increase.
R they ma ywear excessively and/or unevenly, which may greatly
impair tyr etraction.
R thed riving characteristics, as well as steering and braking, may
be greatl yimpaired.
There is arisk of an accident.
X Stop the vehicle without makin gany sudden steering or braking
manoeuvres .Pay attention to the traffic conditions as you do
so.
X Secure the vehicle against rolling away (Y page 181).
X If there is aflat tyre, inspect the tyres (Y page 378).
X Check the tyre pressure (Y page 402).
X If necessary, correct the tyre pressure. h
Please correct
tyre pressure The tyre pressure is too low in at least one of the tyres, or the tyre
pressure difference between the wheels is too great.
X
Check the tyre pressures at the next opportunity
(Y page 402).
X If necessary, correct the tyre pressure. 318
Display messagesOn-board computer and displays

Vehicle
Display messages Possible caus
es/consequences and M Solutions
To start engine,
shift to either P
or N Yo
uh avea ttempte dtostart the engine with the transmission in
position Ror D.
X Shift the transmission to position Por N. Auxiliary battery
malfunction The auxiliary battery for the automatic transmission is no longer
being charged.
X Visit aqualified spec ialist worksho patthe nex toppor tunity.
X Until then, set the automatic transmission to position Pbefore
yo us witch off the engine.
X Before leaving the vehicle, appl ythe electr ic parking bra ke.
X Secure the vehicle agai nstrolling away ( Ypage 181). Ap
plyb rake to deselect Par
k(P) position Yo
uh ave attempted to mov ethe transmission selector lever to
position D,Ror Nwithout depressing the brake pedal.
X Depress the brake pedal. Risk of vehicle
rollin
gTransmis‐ sion not in P Th
ed river's door is open and th etransmission is in position R,N
or D.
Aw arning ton ealso sounds.
X Shift th etransmissio ntoposition P.
X Secur ethe vehicl eagainst rolling away ( Ypage 181). Wi
thoutc hanging gear, consult work‐
shop Yo
uc annot change the transmission position due to amalfunction.
Aw arning ton ealso sounds.
If transmission position Dis selected:
X Drive to aqualified specialist workshop without shiftin gthe
transmissio nfromp osition D.
If transmission position R,Nor Pis selected:
X Consult aqualified specialist workshop. On
ly select Park (P) whe
nvehicle is stationary Th
ev ehicle is moving.
X Pull ove rand sto pthe vehicle safel yassoonasp ossible, paying
attention to roa dand traffic conditions.
X Shift the transmissio ntoposition P. Display messages
319On-board computer and displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
A The tailgat
eisopen.
G WARNING
When the engine is running ,exhaus tgases can enter the vehicle
interior if the tailgate is open.
There is arisk of poisoning.
X Close the tailgate. ? The bonnet is open.
Aw
arning ton ealso sounds.
G WARNING
The open bonne tmay then block your view when the vehicle is in
motion.
There is arisk of an accident.
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 181).
X Close the bonnet. Active bonnet mal‐
function Se
eOwn‐ er's Manual Th
ea ctive bonnet (pedestrian prote ction) is not activ edue to a
malfunction or because it has already been triggered.
X Visit aqualified specialist workshop. C At least one door is open.
Aw
arning ton ealso sounds.
X Close all doors. _
2nd
se
at row, left
Not locked or
2nd sea
tr ow,r ight Not locked Th
es econ drow of seat sisnot engage donthe left-hand and/or
ri gh t-hand side in the rear.
X Fol db ackt he second row of seats unt ilit engages. _
3rd
seat row, left
No
tl ocked or
3rd sea
trow,r ight Not locked Th
et hird row of seats is not engaged on the left-hand or ri ght-hand
side.
X Fol db ackt he third row of seats unt ilit engages. 320
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
j
Ch
eckt railer hitch lock Th
et railer to whitch is no tcorrectly engaged.
Aw arning ton ealso sounds.
X Stop th evehicle immediately, payin gattentio ntoroad and traf-
fic conditions, and switc hoff th eengine.
X Secure the vehicl eagainst rolling away (Y page 181).
X Engage the trailer coupling' sball coupling in the end position
(Y page 259). Ð
Power
steering mal‐
function Se
eOwn‐ er's Manual Th
ep ower steerin gassistanc eisf aulty.
Aw arning ton ealso sounds.
G WARNING
You will need to use mor eforce to steer.
Ther eisar isk of an ac cident.
X Check wheth er youare able to appl ythe ext raforce required.
X If you are abl etosteer safely: carefully drive on to aqualified
specialist workshop.
X If you are unable to steer safely: do not drive on. Contact the
nearest qualified specialist workshop. &
inoperativ
eBat‐ tery low Yo
uh ave attempted to switch on the auxiliary heating or to acti-
vate adeparture tim eusing the on-boar dcomputer after operating
the auxiliary heatin gtwice.
X Let the engine run for 10 seconds.
The auxiliary heating is operational again. The on-board voltage is too low. The auxiliary heating has switched
itself off or cannot be switched on (Y
page 148).
X Driv efor alonger distance.
The battery is being charged. The auxiliary heatin gisoperational
again as soon as the on-boar delectrical system voltage is suf-
ficient. &
inoperative
Refuel
vehicle There is too little fuel in the fuel tank
.The auxiliary heating cannot
be switched on (Y page 148).
X Refuel at the nearest filling station. Displa
ymessages
321On-board compu tera nd displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
&
in
operative See Owner'
sMan. Th
ea uxiliar yheatin ghasatemporary ma lfunction or is faulty.
X When the vehicl eisonalevel surface and the engin ehas cooled
down, make up to four attempts to switch on the auxiliary heat-
ing, waiting several minutes between each attempt
(Y page 148).
X If the auxiliary heating does not switch on, consult aqualified
specialist workshop. Teleph
oneNo service Your vehicl
eisoutside the network provider's transmitter/
receiver range.
X Wait until the mobile phone operational readiness symbol
appears in the multifunction display. ¥
Top
up washer fluid The washe
rfluid level in the washer fluid reservoir has dropped
below the minimum.
X Top up the washer fluid (Y page 364).Wipe
rmalfunction‐ ing Th
ew indscreen wipers are malfunctioning.
X Visit aqualified specialist workshop. Hazard warning
lamp
smalfunction‐ ing Th
eh azard warning lamps are faulty.
X Visit aqualified specialist workshop. Key
Display messages Possible causes/consequences and
M Solutions
Â
Ke
yd oes not belong to vehicle Yo
uh ave put the wrong key in the ignition lock.
X Use the correct key. Â
Replac
ekey Th
ek ey needs to be replaced.
X Visit aqualified specialist workshop. Â
Change ke
ybatter‐ ies Th
eb atteries of the KEYLESS-GO key are discharged.
X Change the batteries (Y page 79).322
Display messagesOn-board computer and displ
ays

Displa
ymessages Possible causes/consequences and
M Solutions
Â
Ke
yn ot detected (red display message) Th
eK EYLESS-GO key is not in the vehicle.
Aw arning ton ealso sounds.
If th eengineiss witched off ,you can no longer loc kthe vehicle
cen trally or start the engine.
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 181).
X Locate the KEYLESS-GO key. The KEYLESS-GO key is not detected while the engine is running
because there is interference from
astron gsource of radio waves.
Aw arning ton ealso sounds.
X Pull ove rand sto pthe vehicle safel yassoonasp ossible, paying
attention to roa dand traffic conditions.
X Secure the vehicl eagainst rolling away (Y page 181).
X Operate the vehicle with the key in the ignition lock if necessary. Â
Ke
yn ot detected (white displa
ymes-
sage) The KEYLE
SS-GO key cannot be detected at present.
X Chang ethe location of the key with the KEYLESS-GO functions
in the vehicle.
If the KEYLESS-GO key is still not detected:
X Operate the vehicle with the key in the ignition lock if necessary. Â
Ke
ys till in vehi‐ cle Th
eK EYLESS-GO key has bee ndetected inside the vehicle during
locking.
X Remov ethe KEYLESS-GO key from the vehicle. Â
Remove starting
button
,then insert key KEYLESS-GO is temporarily malfunctionin
gorisdefective. Awarn-
ing ton ealso sounds.
X Inser tthe key in tothe ignition lock and tur nittothedesired
position.
X Visi taq ualifieds pecialist workshop. Â
Clos
edoors to lock vehicle At leas
tone doo riso pen. Awarning ton ealso sounds.
X Close all door sand lock the vehicle again. Display messages
323On-board computer and displays Z

Warnin
gand indicator lamps in the
instrument cluster Warning and indicator lamps over-
view
L Dipped-beam headlamps
(Ypage 120)
T Side lamps (Y page 119)
K Main-beam headlamps
(Ypage 122)
#! Turn signals (Y page 121)
R Rear foglamp (Y page 120)
ü Seat belts (Y page 325)
J Brakes (Ypage 326)
! ABS(Ypage 32 7)
÷ ESP®
(Y page 329)
å ESP®
OFF (Y page 329)
! Electric parking brake (red)
(Ypage 332)
! Electric parking brake (yellow)
(Ypage 332)
6 SRS (Ypage 332)
; Engine diagnostics
(Ypage 333)
8 Reserve fuel (Y page 333)
? Coolant (Ypage 333)
· Distance warning function
(Ypage 335)
% Diesel engine: preglow
(Ypage 161)
h Tyre pressure monitor
(Ypage 336) 324
Warning and indicator lamp
sintheinstrument clusterOn-boar dcomputer and displays

Safety
Sea tbelts Problem Possible causes/consequences and
M Solutions
ü
Only for certain coun-
tries: the red seat belt
warnin
glamp 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 47).ü
Only for certain coun-
tries: the red seat belt
warning lamp lights up
after the engine starts.
In addition,
awarning
tone sounds for up to
six seconds. The driver'
sseat belt is not fastened.
X Fasten your seat belt (Y page 47).
The warning tone ceases. ü
The red seat belt warn-
ing lam
plights 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 47).
The warnin glamp goes out. There are objects on the front-passenger seat.
X
Remove the objects from the front-passenger seat and stow
them in asecur eplace.
The warnin glamp goes out. ü
The red seat belt warn-
ing lamp flashes and an
intermitten
taudible
warning sounds. The driver or front passenger has not fastened their seat belt. At
th es am etime, yo uare dr ivingfaster than25k m/h or have briefly
driven faster than 25 km/h.
X Fasten your seat belt (Y page 47).
Th ew arning 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 asecur eplace.
The warnin glamp goes out and the intermittent warning tone
ceases. Warnin
gand indicator lam psin th einstru ment cluster
325On-board computer and displays Z

Safety systems
Problem Possible causes/consequences and
M Solutions
J
The yellow brake sys-
tem warnin glamp
lights up while the
engine is running. G
WARNING
The brake system is malfunctioning and the braking characteris-
tics may be affected.
There is arisk of an accident.
X If the multifunction display shows adisplay message, please
observe this.
X Driv eonc arefully.
X Visit aqualified specialist workshop. J
The red brake system
warning lamp comes on
while the engine is run-
ning. Awarning tone
also sounds. G
WARNING
The brake boosting effect is malfunctioning and the braking char-
acteristic smay be affected.
There is arisk 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 181).
X Consult aqualified specialist workshop.
X Observe the additional display messages in the multifunction
display. J
The red brake system
warning lamp comes on
while the engine is run-
ning. Awarning tone
also sounds. There is insufficient brake fluid in the fluid reservoir.
G WARNING
The braking efficienc ymay be impaired.
There is arisk 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 181).
X Do not top up the brake fluid. Topping up will not rectif ythe
fault.
X Consult aqualified specialist workshop.
X Observe the additional display messages in the multifunction
display. 326
Warnin
gand indicator lam psin th einstru ment clusterOn-board computer and displays

Problem Possible causes/consequences and
M Solutions
!
The yellow AB
Swarning
lamp is lit while the
engine is running. ABS (Anti-lock Brake System) has been deactivated due to
afault.
For this reason, BAS (Brake Assist), BAS PLUS, ESP ®
(Electronic
Stability Program), PRE-SAFE ®
,P RE-SAFE ®
Brake, COLLISION
PREVENTION ASSIST, the HOLD function, hill start assist, cross-
wind driving assistance, adaptive brake lights and ESP ®
trailer
stabilisation, for example, are also deactivated.
ATTENTION ASSIST is deactivated.
G WARNING
The brake syste mcontinue stofunction normally, but without the
functions listed above. The wheel scould therefor elock if you
brake hard ,for example.
The steerabilit yand braking characteris tics may be severely affec-
ted .The brakin gdistance in an emergenc ybraking situatio ncan
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilis ethe vehicle.
The danger of skidding and having an accident increases.
X Observ ethe additiona ldisplay messages in the multifunction
display.
X Driv eonc arefully.
X Visit aqualified specialist workshop.
If the ABS control unit is faulty, there is also apossibility that other
systems, such as the navigation system or the automatic trans-
mission ,will not be available. Warning and indicator lamp
sinthe instrument cluster
327On-board computer and displays Z