MERCEDES-BENZ M-CLASS SUV 2011 Owners Manual

Displa
ymessages Possible causes/consequences and
M Solutions
The yellow
!warning lamp lights up. The red !indicator
lamp flashes fo rabout 10 seconds after the electric parkin gbrake
ha sb een applied or released. It then goes out or remains lit.
The electric parkin gbrake is malfunctioning.
X Switch off th eignition and tur nitback on.
X Apply the electric parkin gbrake.
If it is not poss ible to apply the electric parkin gbrake:
X Shift th etransmission to P.
X Vis itaq uali fieds pecialist workshop.
If it is not possible to release the electric parkin gbrake:
X Releas ethe elec tricp arkin gbrake automaticall y(Ypage 16 1).
If th eelectric parkin gbrake can stil lnot be released:
X Consult aqualified specialist workshop. The yellow
!warning lamp lights up. If you manually apply or
release the electric parkin gbrake ,the red !indicator lamp
fla shes.
The electric parking brak eismalfunctioning. It is not poss ible to
apply the electric parking brake manu ally.
X Shift the transmission to P.
X Visit aquali fieds pecialist workshop. !
Pk
gb rake inopera‐ tive Th
ey ellow !warning lam plights up. The red !indicator
lamp flashes for about 10 seconds after the electric parkin gbrake
ha sb een applied or released. It then goes out or remains lit.
The electric parkin gbrake is malfunctioning ,e.g. because of over-
voltag eorundervoltage.
X Remove the cause for the overvoltage or undervoltage ,e.g. by
charging the battery or restarting the engine.
X Appl yorr elease the electric parkin gbrake.
If it remains impossibl etoapply or release the electric parking
brake:
X Swit choff the ignition and tur nitback on.
X Apply or release the electric parkin gbrake.
If th eelectric parkin gbrake can stil lnot be released:
X Consult aqualified specialist workshop. 258
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
The display message is only shown while th
evehicl eisinm otion.
The red !indicato rlamp flashes and the yellow !warning
lamp is lit.
It is not possible to apply the electric parkin gbrake manually.
X Shift th etransmission to P.
X Visit aqualified specialist workshop. !
Turn on th
eigni‐ tion to release
the parking brake Th
er ed ! indicator lam pislit.
You attempted to release the electric parkin gbrake whil ethe igni-
tion was switched off.
X Key: turnthe key to position 1in the ignition lock.
X KEYLESS-GO: switchont he ignition. J
Chec
kbrake fluid level G
Ris
kofa ccident
There is insufficien tbrake flui dinthe brake flu idreservo ir.Ina ddi-
tion, the red Jwarning lamp in the instrumen tcluster lights
up and awarning tone sounds.
X Pul lover and stop th evehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driv ing
under any circumstances.
X Apply the electric parking brake.
X Consult aqualified specialist worksho p.
X Do not top up the brake fluid. Thi sdoes not correc tthe error. #
Chec
kbrake wear Th
eb rake pa ds/linings have reach edtheir wea rlimit.
X Visit aqualified specialist workshop. PRE-SAFE
inoperativ
eSee Owner's Manual G
Ris
kofi njury
Impor tant functions of PRE-SAFE ®
have failed. All other occupant
safety sys tems,e.g. airbags, remain available.
X Visit aqualified specialist worksho pimmediately. Display mess
ages
259On-boa rd comp uter and displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
PR
E-SAFE Functions cur‐
rently limited See
Owner'
sManual G
Risk of accident
PRE-SAFE ®
Brake is tempora rily inoperative if:
R theD ISTR ONIC PLU Scove rint he ra diatorgrille is di rty.
R the sensor sinthebumpers are dirty.
R itsf unction is impaire ddue to heav yrain or snow.
R ther adar sensor system is temporarily inoperative, e.g. due to
elect romagnetic radiatio nemitted by nearby TV or radio sta-
tions or other source sofelectromagnetic radiation.
R the system is outside the operatin gtemperatur erange.
R the on-board voltage is too low.
PRE-SAFE ®
Brak eiso perational again and the display message
disappears if:
R the dirt (e.g. slush) drops away while the vehicle is in motion.
R the system detects that the sensor sare full yavailable again.
R thes ystem is within the operatin gtemperatur erange.
If the display message continues to be displayed:
X Clean the DISTRONIC PLUS cover in the radiator grille
(Y page 327).
X Clean the bumpers (Y page 327).
X Restart the engine.
X Wait until the batter yissufficiently charged. PRE-SA
FE Functions limited
See Owner's Manual G
Ris
kofa ccident
PRE-SAFE ®
Brak eisf aulty. BA SPLUS or th edistance warnin gsig-
nal may also have failed.
X Visit aqualified specialist workshop. ü If the symbo
lappears in the multifunction display, aseat belt
tongue has been clipped int oarear seat belt buckle.
For further information on the status indicator for the rear seat
belts: (Y page 49). ý G
Risk of inju
ry
If th esymbol appears in the multifunction display, aseat belt
tongue has not been clipped int oarear seat belt buckle.
X If necessary, ask the occupants in the rear to fasten their seat
belts.
For further information on the status indicator for the rear seat
belts: (Y page 49). 260
Display messagesOn-boar
dcomputer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
Ch
ilds eatin wrong position
See Owner'
sManual G
Risk of in
jury
Vehicles with automatic child seat recognition on the front-
passenge rseat: the child seat is positioned incorrectly.
X Fit the child seat in the correc tposition. G
Risk of injury
Vehicles with automatic child seat recognition on the front-
passenger seat: the automatic child seat recognition sensor is
faulty.
X Visit aqualified specialist workshop. 6
Restraint
sys. mal‐
function Consult
workshop G
Risk of injury
There is amalfunction in the SRS (Supplemental Restraint Sys-
tem). The 6warning lamp also lights up in the instrumen tclus-
ter.
X Visit aqualified specialist workshop. 6
Front
left malfunc‐
tion Consul
twork‐ shop or
Front right malfunction Con‐
sult workshop G
Ris
kofi njury
SRS has malfunctioned at the fronton the left or right. The 6
warning lamp also lights up in the instrument cluster.
X Visi taq ualifieds pecialist workshop. 6
Rear left malfunc‐
tion Consul
twork‐ shop or
Rear right malfunction Con‐
sult workshop G
Ris
kofi njury
SRS has malfunctioned at the rear on the left or right .The 6
warnin glamp also lights up in the instrument cluster.
X Visit aqualified specialist workshop. Display messages
261On-boardcomputer and displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
6
Re
ar centre mal‐ function Consult
workshop G
Risk of in
jury
SRS has malfunctioned at the rear centre. The 6warning lamp
als olights up in th einstrument cluster.
X Visi taqualified specialist workshop. 6
Left
windowbag mal‐
function Consult
workshop orR
ight windowba
gmalfunc‐ tion Consult work‐
shop G
Ris
kofi njury
There is amalfunction in the left-han dand/or right-han dwindow-
bag. The 6warnin glamp also lights up in the instrumen tclus-
ter.
X Visit aqualified 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
Le
ft cornering light or
Right cor‐ nering light Th
eleft or right-hand cornering light is faulty.
X Chec kwhether you ar epermitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Left dipped beam
or
Righ tdipped beam Th
eleft or right-hand dipped-beam headlamp is faulty.
X Check whether you are permitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Traile
rleft tail lamp or
Trailer right tail lamp Th
eleft or right-hand trailer tail lam pisfaulty.
X Check whethe ryou ar epermitted to change the bulb yourself.
or
X Visit aqualified specialist workshop. b
Traile
rleft indi‐ cator or
Trailer right indicator Th
eleft or right-hand trailer tur nsignal lamp is faulty.
X Check whether you are permitted to change the bulb yourself.
or
X Visit aqualified specialist workshop. 262
Display messagesOn-board computer and displ
ays

Displa
ymessages Possible causes/consequences and
M Solutions
b
Tr
ailerb rake lamp Th
et railer brak elamp is faulty.
X Chec kwhether you ar epermitted to change the bulb yourself.
or
X Visit aqualified specialist workshop. b
Rear
left indicator
or
Rear righ tindi‐ cator Th
er ear left-hand or rear right-hand tur nsignal is faulty.
X Check whether you are permitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Fron
tleft indica‐ tor or
Front right indicator Th
ef ront left-hand or fron tright-hand turn signal is faulty.
X Check whether you are permitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Left
mirror indica‐
tor or
Righ tmir‐ ror indicator Th
et urn signal in the left-hand or right-hand exterior mirror is
faulty.
X Check whether you are permitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Thir
dbrake lamp Th
et hir db rake lamp is faulty.
X Check whether yo uare permitted to change th ebulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Left-han
dtail lamp/brake lamp or
Right-hand tail lamp/brake lamp Th
eleft or right-hand brak elamp is faulty.
X Check whethe ryou ar epermitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Left main beam
or
Righ tmain beam Th
eleft or right-hand high beam is faulty.
X Check whether you are permitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. Display messages
263On-boardcomputer and displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
b
Nu
mber plate lamp Th
elicence plat elamp sare faul ty.
X Chec kwhether you ar epermitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Rear fo
glamp Th
er ear foglam pisfaulty.
X Check whethe ryou ar epermitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Front
left parking
lamp or
Front righ
tparking lamp Th
ef ront left or fron tright parkin glamp is faulty.
X Check whethe ryou ar epermitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Reversin
glight Th
er eversing lam pisfaulty.
X Check whethe ryou ar epermitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Left tail lamp
or
Righ ttail lamp Th
eleft or right-hand tail lam pisfaulty.
or
The rear left or right side marker lamp is faulty.
X Check whethe ryou ar epermitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Left daytim
edriv‐ ing lamp or
Right daytime driving
lamp Th
eleft or right-hand daytime driving lam pisdefective.
X Check whether you are permitted to change the bulb yourself
(Y page 113).
or
X Visit aqualified specialist workshop. b
Intell
.Light Sys‐ tem inoperative Th
eI ntelligent Light Syste misfaulty. The lights remain available
without the Intelligent Light System.
X Visit aqualified specialist workshop. 264
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
b
Ma
lfunction See Owner'
sManual Th
ee xter ior lighting is faulty.
X Visit aqualified specialist workshop. Vehicles with trailer tow hitch:
afuse may have blown.
X Check the fuses (Y page 352).
X If necessary, replac ethe blown fuse. Observe the warnin gnotes
as you do so.
If the display message continues to be displayed:
X Visit aqualified specialist workshop. b
AUTO
lights inoper‐
ative The light sensor is faulty.
X
Visit aqualified specialist workshop. b
Switch of
flights Th
elights are still switched on when you leave the vehicle. A
warnin gtonea lso sounds.
X Turn the light switc htoÃ. Adaptive Main-beam
Assist inoperative Adap
tive Highbea mAssist is faulty.
X Visit aqualified specialist workshop. Adaptive Main-beam
Assist currently
unavailabl
eSee Owner's Manual Adap
tive Highbea mAssist is deac tivated and temporarily inoper-
ati ve.P ossible causes:
R the windscreen is dir tyinthec amera's field of vision.
R visibility is impaired due to heavy rain, snow or fog.
X Clean the windscreen.
If the system detect sthat the cam era is fullyoperational again,
the Adaptive Main-bea mAssist availabl eagain message
is displayed.
Adap tive Highbea mAssist is operationa lagain. Displa
ymessages
265On-board comp uter and displays Z

Engine
Display messages Possible causes/consequences and
M Solutions
+
Top
up co
olant See
Owner'
sManual Th
ec oolant leve listoo low.
X Top up th ecoolant ,obser ving the warning note swhen doin gso
( Y page 321).
X If th ecoolant needs toppin gupmoreo ften than usual ,have the
engin ecoolant system checked at aqualified specialist work-
shop. ?
Co
olantS topv ehi‐ cle Switch engine
off Th
ec oolant is to ohot.
Aw arning ton ealso sounds.
X Stop th evehicle immediately, payin gattentio ntoroad and traf-
fic conditions, and switc hoff th eengine.
X Make sure that the air supply to the engine radiato risn ot
blocked, e.g. by frozen slush.
X Wait until the display message disappears befor erestar ting the
engine. Otherwise, there is arisk of engine damage.
X Pay attention to the coolant tempera turedisplay.
X If the temperature increases again, visit aqualified specialist
worksho pimmediately. ? Th
ef an motor is faulty.
X If the coolant temperature is less than 120 †, you can continue
driving to the nearest qualified specialis tworkshop.
X Avoid heav yloads on the engin easyou do so, e.g. drivin gon
mountain roads and stop-start traffi c.266
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
# The battery is no
tbeing charged.
Aw arning ton ealso sounds.
Possible causes:
R fault yalternator
R torn poly-V-belt
R am alfunction in th eelectronics
X Stop th evehicle immediately, payin gattentio ntoroad and traf-
fic conditions, and switc hoff th eengine.
X Ope nthe bonnet.
X Chec kwhether the poly-V-belt is tor n.
If the poly-V -belt is torn:
! Do not continue driving. The engine could otherwise overheat.
X Consult aqualified specialist workshop.
If the poly-V-belt is OK:
X Visit aqualified specialist workshop. 4
Chec
keng. oil lev. when next
refuelling Th
eo il level has dropped to the minimum level.
Aw arning ton ealso sounds.
X Chec kthe oil level, at the latest when nex trefuelling
(Y page 320).
X If necessary, top up the engine oil (Y page 320).
X Hav ethe engin echecked at aqualified specialist worksho pif
the engine oil needs topping up more often than usual. 8
Reserv
efuel level Th
ef uel 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
avery small amount of fuel in the fuel tank.
The auxiliary heatin gcannot be operated.
X Refuel at the nearest filling station without fail. ¸
Replace
air cleaner Vehicles with
adiesel engine: the engine air filter is dirty and must
be replaced.
X Visit aqualified specialist workshop. Display messages
267On-boardcomputer and displays Z