2011 MERCEDES-BENZ M-CLASS SUV sensor

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
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

Displa
ymessages Possible causes/consequences and
M Solutions
Sp
eedL imit Assist currently unavail‐
abl
eS ee Owner's Manual Spee
dLimit Assist is deactivated an dtemporarily inoperative.
Possible causes:
R the windscreen is dirt yinthe camera's field of vision.
R visibility is impaired due to heav yrain, snow or fog.
If the displ aymessage does not disappear:
X Pull ove rand sto pthe vehicle safely as soon as possible, paying
attention to roa dand traffic conditions.
X Appl ythe electric parkin gbrake.
X Cle anthe windscreen.
If th esystem detects that the camera is fully operational, the dis-
play messag edisappears.
Speed Limit Assist is operational again. Speed Limit Assist:
Unavailabl
ein this country Spee
dLimit Assist is only available in certain countries.
X Driv eon.
Spee dLimit Assist is available again when you drive in acount ry
in which its use is approved. Spee
dLimit Assist inoperative Spee
dLimit Assist is faulty.
X Visit aqualified specialist workshop. HOLD
Off The HOLD function is deactivated. The vehicle is skidding.
Aw arning ton ealso sounds.
X Reactivat ethe HOL Dfunction later (Y page 187). Ra
dars ensor deac‐ tivated autom. See
Owner'
sManual Vehicles with
anavigation system :the vehicl eisclose to aradio
telescope facility and is therefor eprohibited from transmittin gany
radar sig nals. The radar sensor system has switched off automat-
icall y(Ypage 380).
DISTRONI CPLUS (Y page 174) is deactivate dautomaticall yifitis
activated. Awarning ton ealso sounds.
Blin dSpotA ssist (Y page 208) or Ac tiveBlind Spo tAssist
(Y page 212) is deactivate dautomaticall yifitisactivated. The
yellow 9indicator lamps als olight up in the exterior mirrors.
BAS PLU S(Brake Assis tPLUS) (Y page 62) and PRE-SAFE ®
Brake
(Y page 66) are then also no tavailable.
X Drive on.
Once yo uhave moved far enough awa yfrom th eradio telescope,
the above function sare avai lable again. 272
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
Vehicles wit
hBecker ®
MA PPILOT :ifthe Becker ®
MA PPILOT is
not connected, the radar sensor syste misdeactivated automati-
cally.
BAS PLUS, DI STRONIC PLUS, Blind Spot Assis torActive Blind
Spo tAssist and PRE-SAFE ®
Brake ar enot available.
X Connect the Bec ker®
MAP PILOT; see the separate operating
inst ructions. Rada
rsensor deactivated See
Owner's Manual Th
er adar senso rsystem is deactivated.
X Check whether or not the radar sensor syste mmay be activated
(Y page 380).
X Switch on the radar senso rsystem (Y page 249). Lan
eKeeping Assist currently
unavailable See
Owner's Man‐
ual or
Active Lane Keeping Assist cur‐
rently unavailable
See Owner's Manual Lan
eKeeping Assist or Active Lan eKeeping Assist is deactivated
and temporarily inoperative. Possible causes:
R the windscreen is dirt yinthe camera's field of vision.
R visibilit yisimpaire ddue to heavy rain, snow or fog.
R there are no lane markings for alonger period.
R the lane markings ar eworn ,dark or covered, e.g. by dirt or snow.
If 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 Apply the electric parking brake.
X Clean the windscreen.
If the system detect sthat the camera is fully operational ,the dis-
play message disappears.
Lane Keeping Assist or Ac tive Lane Keeping Assist is operational
again. Lane Keeping
Assist inopera‐
tive orActive Lane
Keeping Assist
inoperative Lane Keeping Assist or Active Lane Keeping Assist is faulty.
X
Visit aqualified specialist workshop. Display messages
273On-boardcomputer anddispl ays Z

Displa
ymessages Possible causes/consequences and
M Solutions
Bl
indS potA ssist currently unavail‐
abl
eS ee Owner's Manual or
Ac tive Blind Spo
tAssist currently unavail‐
abl
eS ee Owner's Manual Blind Spot Assist or Active Blind Spot Assis
tist emporaril yinop-
erative .Possible causes:
R you have established the electrical con nectio nbetween the
trailer and your vehicle.
R the sensors are dirty.
R function is impaired due to heavy rai norsnow.
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 Whe ntowing atrailer, con firm th edisplay message with a.
If you are drivin gwithout atrailer and th edisplay message does
not disappear:
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 Clean the sensors (Y page 327).
X Restart the engine.
If the system detect sthat the sensor sare full yoperational, the
display message disappears.
Blin dSpot Assist or Active Blin dSpot Assist is operational again. Blin
dSpot Assist inopera‐
tive or
Active Blind Spot Assist inoper‐
ative Blind Spot Assist or Active Blind Spot Assist is faulty.
Th ey ellow 9indicator lamps also light up in the exterior mir-
rors.
X Visit aqualified specialist workshop. Park Assist
cancelled The driver'
sdoor is open and the driver' sseat belt has not been
fastened.
X Repeat the parking process with the seat belt fastened and the
driver' sdoor closed. You have inadvertently touched the multifunc
tion steerin gwheel
while steerin gintervention was active.
X While steerin gintervention is active, make sure that the multi-
function steerin gwheel is not touched. 274
Displa
ymessagesOn-board compu tera nd displays

Displa
ymessages Possible causes/consequences and
M Solutions
DI
STRONIC PLUS currently unavail‐
abl
eS ee Owner's Manual DISTRONIC is deactivated and tempora
rily inoperative. Possible
causes:
R theD ISTR ONIC PLU Scove rint he ra diatorgrille is di rty.
R function is impaire ddue to heav yrain or snow.
R thes ensor sinthebumpers are dirty.
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.
Aw arning ton ealso sounds.
If th edisplay message does no tdisappear:
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 Clean the DISTRONIC PLU Scover in the radiator grille
(Y page 32 7).
X Clean the bumper s(Ypage 32 7).
X Restart the engine.
If the system detects that the sensors are fully operational, the
displa ymessage disappears.
DI ST RONIC is operational again. DISTRONIC PLUS
inoperative DISTRONIC PLUS is faulty. BAS PLUS and PRE-SAFE
®
Brake may
also have failed.
Aw arning ton ealso sounds.
X Visi taq ualifieds pecialist workshop. DISTRONI
CPLUS override Yo
uh ave depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the spee dofthe vehicle.
X Take your foot off the accelerator pedal. DISTRONI
CPLUS --- km/h An activation conditio
nfor DI STRONIC PLUS is not fulfilled.
X Check the activation conditions for DISTRONIC PLUS
(Y page 174). DISTRONIC PLUS and
SPEEDTRONIC
inoperative DISTRONIC PLUS and SPEEDTRONIC are faulty.
Awarning tone
also sounds.
X Visit aqualified specialist workshop. 276
Display messagesOn-board computer and displays

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