MERCEDES-BENZ M-CLASS SUV 2011 Owners Manual

Displa
ymessages Possible causes/consequences and
M Solutions
Ru
nF latI ndicator inoperative Th
et yrep ressur eloss war ningsystem is faulty.
X Visit aq ualified specialist workshop. Ty
re pressures wil
lbed isplayed after
afew minute
sofd riving Th
et yrep ressur emonitor is mea suring thetyrep ressure.
X Drive on.
Th et yrep ressures appear in the multifunction displa yafter you
have been driving for afew minutes. Tyre press. monitor
inoperative The tyr
epres sure monito risfaulty.
X Visi taq ualifieds pecialist workshop. Tyre press. monitor
inoperativ
eNo wheel sensorsinop‐
erativ
eNow heel sensors Th
ew heels fit teddon ot have asuitable tyre pressure sensor. The
tyre pressure monitor is deactivated.
X Fit wheel swith suitable tyre pressure sensors.
The tyre pressure monitor is activated automatically after driv-
ing for afew minutes. Check
tyre(s) G
Risk of accident
The tyr epressure in one or more tyre shas dropped significantly.
The wheel position is displayed in the multifunction display.
Aw arning ton ealso sounds.
X Stop th evehicle without making any sudde nsteering or braking
mano euvres.P ay attention to the traffic conditions as you do
so.
X Correc tthe tyr epressure (Y page 361).
X If necessary, change awheel (Y page 363). Caution,
tyre defect G
Risk of accident
The tyr epressure in one or more tyre shas dropped suddenly. The
wheel position is displayed in the multifunc tion display.
X Stop the vehicle withou tmaking any sudde nsteering or braking
manoeuvres. Pay attention to the traffic conditions as you do
so.
X If necessary, change awheel (Y page 363). Rectify
tyre pressure The tyr
epressure is to olow in at least one of the tyres, or the tyre
pressure differen cebetween the wheels is too great.
X Check the tyr epressures at th enext opportunity. If necessary,
correc tthe tyr epressure (Y page 361). 278
Display messagesOn-boar
dcompu tera nd displays

Displa
ymessages Possible causes/consequences and
M Solutions
Wh
eels ensor(s) missing There is no signal from the tyre pressu
resensor of on eorseveral
wheels. The pressur eofthe affected tyre is notdispla yed in the
multifunction display.
X Have the faulty tyre pressure sensor replaced at aqualified spe-
cialist workshop. Tyre press. monitor
currentl
yunavail‐ able Due to
asour ceofrad io interference, no signals can be received
from the wheel sensors. The tyr epressure monito rist emporarily
malfunctioning.
X Drive on.
The tyr epressure monito rrestarts automatically as soon as the
problem has been solved. h
Tyre pressure Cau‐
tion
,tyre malf. G
Ris
kofa ccident
The tyre pressure in one or more tyres has dropped suddenly.
Aw arning ton ealso sounds.
X Stop th evehicle without making any sudde nsteering or braking
mano euvres.P ay attention to the traffic conditions as you do
so.
X If necessary ,change awheel (Y page 363). h
Tyre pressure
Chec
ktyre(s) G
Ris
kofa ccident
The tyre pressure in one or more tyres has dropped significantly.
X Stop the vehicle without making any sudde nsteering or braking
manoeuvres. Pay attention to the traffic conditions as you do
so.
X If necessary, change awheel (Y page 363).
X Chec kthe tyr epressure. If necessary, corre ct thetyre pressure
(Y page 361). h
Please correct
tyr
epressure Th
et yre pressure is too low in at leas tone of the tyres, or the tyre
pressure difference between the wheels is too great.
X Check the tyre pressures at the next opportunity. If necessary,
correct the tyre pressure (Y page361). Display messages
279On-boardcomputer anddisplays Z

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 aquali fied sp ecialist 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. Apply brake 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. Vehicle
no
tinp osition 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 Apply th eelectric parking brake. Wi
thoutc hanging gear,
consul
tworkshop 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
nv ehicl eis 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. A The tailgate is open.
X Close the tailgate. 280
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
? G
Risk of acc
ident
The bonne tisopen. Awarning ton ealso sounds.
X Pull ove rand sto pthe vehicle safel yassoonasp ossible, paying
attention to roa dand traffic conditions.
X Appl ythe electric parkin gbrake.
X Close th ebonnet. Active bonnet mal‐
function Se
eOwn‐ er's Manual Th
ea ctive bonnet (pedestrian protection) is not active due to a
malfunction or because it has already bee ntriggered
(Y page 318).
X Visit aqualified special istworkshop. C At least one door is open.
Awarning ton ealso sounds.
X Close all doors. D
Po
wer steering mal‐
function See Own‐
er'
sM anual G
Risk of accident
Th ep ower steering assistance is faulty.
You will nee dtouse mor eforce to steer.
Aw arning ton ealso sounds.
X Chec kwhether you ar eable to apply the extr aforc erequired.
X If you are able to steer safely: carefully driveontoaqualified
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 130).
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 The fuel level in the fuel tank is too low. The auxiliary heating can-
not be switched on (Y page 130).
X Refuel at the nearest filling station. Display messages
281On-boardcomputer and 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 130).
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 321).Key
Display messages Possible causes/consequences and
M Solutions
+
Ke
yd oes not belong to vehicle Yo
uh ave put the wrong key in the ignition lock.
X Use the correct key. +
Replac
ekey Th
ek ey needs to be replaced.
X Visit aqualified specialist workshop. +
Change ke
ybatter‐ ies Th
eb atteries of the KEYLESS-GO key are discharged.
X Change the batteries (Y page 74).+
Ke
yn ot detec‐ ted (re
dd isplay mes-
sage) The KEYL
ESS-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 Apply the electric parking brake.
X Locate the KEYLESS-GO key. 282
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
The KEYLESS-GO ke
yisnot detected whil ethe engin eisrunning
because there is interference from astrong source 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 Appl ythe electric parkin gbrake.
X Operate th evehicle with the key in the ignition lock if necessary. +
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. +
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. +
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. +
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
283On-boardcomputer anddisplays Z

Warnin
gand indicator lamps in th einstrument cluster Seat belts
Problem Possible causes/consequence
sand M Solutions
7
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 fron
tpassenger
to fasten their seat belts.
X Fasten your seat belt (Y page 46).7
Only for cer
tain coun-
tries: the red seat belt
warnin glamp lights up
after the engine starts.
In addition, awarning
tone sounds for up to
six seconds. G
Risk of injury
The driver' sseat belt is not fastened.
X Fasten your seat belt (Y page 46).
The warning ton eceases. 7
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. G
Risk of injury
The driver or front passenger has not fastened their seat belt.
X Fasten your seat belt (Y page 46).
The warnin glamp goes out. G
Risk of injury
There are object sonthe front-passenger seat.
X Remove the objec tsfrom th efront-passenger seat and stow
them in asecur eplace.
The warnin glamp goes out. 284
Warnin
gand indicator lam psin the instrument clusterOn-board compu tera nd displays

Problem Possible causes/consequences and
M Solutions
7
The red seat belt warn-
ing lam pflashes and an
intermitten taudible
warning sounds. G
Ris
kofi njury
The driver or fron tpassenger 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 46).
Th ew arning lamp goes out and the intermittent warning tone
ceases. G
Risk of injury
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. Safety systems
Problem Possible causes/consequence
sand M Solutions
J
The yellow brak
esys-
tem warning lamp
lights up while the
engine is running. G
Risk of accident
The brake syste mism alfunctionin gand the braking characteris-
tics may be affected.
X If the multifunctio ndispla yshows adispla ymessage, please
observ ethis.
X Drive on carefully.
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
Risk of accident
The brake boosting effect is malfunctionin gand the braking char-
acteristics may be affected.
X Pull over and sto pthe vehicle safely as soon as possible, paying
attention to roa dand traffic conditions. Do not continue driving
under any circumstances.
X Appl ythe electric parkin gbrake.
X Consult aqualified specialist workshop.
X Observe the additional displa ymessages in the multifunction
display. Wa
rning and indicator lamp sinthe instrument cluster
285On-boardcomputerand disp lays Z

Problem Possible causes/consequences and
M Solutions
J
The red brake system
warnin
glamp comes on
while the engine is run-
ning. Awarning tone
also sounds. G
Risk of accident
There is insufficient brake fluid in the fluid reservoir.
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 electric parking brake.
X Consult aqualified specialist worksho pimmediately.
X Observe th eadditiona ldisplay messages in the multifunction
display.
Do not top up the brake fluid. This does not correct the error. !
The yello
wABS warning
lamp is lit while the
engine is running. G
Risk of accident
ABS (Anti-lock Brake System) has bee ndeactivated due to afault.
For this reason, BAS (Brake Assist), BAS PLUS, ESP ®
(Electronic
Stability Program), PRE-SAFE ®
,P RE-SAFE ®
Brake, the HOL Dfunc-
tion, hill start assist, the adaptive brake lights and ESP ®
trailer
stabilisation are also deactivated, for example.
The brake system continues to function normally, but without the
functions listed above. The wheel scould therefor elock if you
brake hard ,for example.
ATTENTION ASSIS Tisdeactivated.
X Observ ethe additiona ldispla ymessages in the multifunction
display.
X Drive on carefully.
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. 286
Warning and indicator lamp
sinthe instrument clusterOn-board compute rand displays

Problem Possible causes/consequences and
M Solutions
!
The yellow AB
Swarning
lamp is lit while the
engine is running. G
Risk of accident
ABS is temporarily unavailable. Therefore, BAS ,BAS PLUS, ESP ®
,
EBD (electronic brake force distribution), PRE-SAFE ®
,
PRE-SAFE ®
Brake, the HOLD function, hil lstart assist, the adaptive
brake lights and ESP ®
trailer stabilisation, for example, are also
deactivated.
Self-diagnosi sisnot yet complete or the on-boar dvoltage ma ybe
insufficient ,for example.
The brake system con tinues to function normally, but without the
functions listed above .The wheels could therefor elock if you
brake hard ,for example.
ATTENTION ASSIS Tisdeactivated.
X Careful lydriv eonas uitable 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. !
The yello
wABS warning
lamp is lit while the
engine is running .A
warning tone also
sounds. G
Risk of accident
EBD is faulty. Therefore, ABS ,BAS, BAS PLUS, ESP ®
,P RE -SAFE ®
,
PRE-SAFE ®
Brake, the HOLD functi on,hills tart assist, the adaptive
brake lights and ESP ®
trai lers tabilisation, for example, are not
availabl eeither.
The brake system continues to function normally, but without the
functions listed above .The wheels could therefor elock if you
brake hard ,for example.
ATTENTION ASSIS Tisdeactivated.
X Observ ethe additiona ldisplay messages in the multifunction
display.
X Driv eonc arefully.
X Visit aqualified specialist workshop. Warnin
gand indicator lam psin the instrument cluster
287On-boardcomputera nd disp lays Z