2011 MERCEDES-BENZ M-CLASS SUV sensor

Problems wit
hPARKTRONIC Problem Possible causes/consequences and
M Solutions
Only the red segments
in the PARKTRONIC
warning display sare lit.
Yo ua lso hear awarning
tone for approximately
two seconds.
PARKTRONIC is deacti-
vated after approx-
imately 20 seconds,
and the indicator lamp
in the PARKTRONIC
button lights up. PARKTRONIC has malfunctioned and has switched off.
X If problems persist, have PARKTRONIC checked at aqualified
specialist workshop. Only the red segments
in the PARKTRONIC
warning display sare lit.
PARKTRONIC is deacti-
vate dafter approx-
imatel y20seconds. The PARKTRONI
Csensors are dirt yorthere is interference.
X Clean the PARKTRONI Csensors (Y page 327).
X Switch the ignition back on. The problem may be caused by an exter
nalsource of radio or
ultrasoun dwaves.
X See if PARKTRONIC functions in adifferent location. Active Parking Assist
Important safet ynotes Active Parking Assist is an electronic parking
aid with ultrasound. Ultrasound is used to
measure the road on both sides of the vehicle.
As uitable parking space is indicated by the
parking symbol. Activ esteering intervention
can assis tyou during parking. You ma yalso
use PARKTRONIC (Y page 191). When PARK-
TRONIC is switched off, Active Parking Assist
is also unavailable. G
WARNING
Active Parkin gAssist is merely an aid and may
sometimes recommen dparking spaces that
are not suitable for parking. For example,
these might be spaces where parking is pro-
hibited ,driveways, unsuitabl esurfaces, etc.
Active Parking Assis tmeasures the parking
space as you driv epast it. Any later changes to the parking space are not taken into
account .For insta nce,this ma ybethe case
when the vehicle parked in front of or behind
the space changes its position or when an
obstacle is moved int othe parkin gspace.
Active Parking Assist does not reliev eyou of
the responsibilit yofpaying attention. If you
rely solel yonA ctive Parkin gAssist ,you could
cause an accident and injure yourself and oth-
ers.
You are always responsible for safet yand
must continue to pay attention to your imme-
diate surroundings whe nparking and
manoeuvring. G
WARNING
Objects located above the heigh trange of
Active Parking Assis twill not be detected
when the parking space is measured. These
are not taken into account when the parking 194
Drivin
gsystemsDrivin gand parking

Problems wit
hNight View Assist Plus Problem Possible causes/consequences and
M Solutions
The pictur
equality of
Night View Assis tPlus
has deteriorated. The windscreen wipers are smearin
gthe windscreen.
X Replace the wiper blades (Y page 117). The windscreen is smeared after the vehicle has been cleaned in
ac ar wash.
X Clea nthe windscreen (Y page 326). There is windscreen chip damage in the camera's field of vision.
X Replace the windscreen. The windscreen is misted up on the inside.
X Demist the windscreen (Y page 128). The windscreen is iced up.
X De-ice the windscreen (Y page 127). There is dir
tonthe insid eofthe windscreen.
X Clean the insid eofthe windscreen (Y page 326). Lan
eTracking package
General notes The Lane Tracking package consis
tsof Blind
Spot Assist (Y page 208) and Lane Keeping
Assist (Y page 210).
Blind Spot Assist Important safety notes
Blin dSpot Assist uses aradar senso rsystem
to monitor the areas on both side sofyour
vehicle. It supports you from speeds of
30 km/h. Awarning displ ay inthee xterior
mirrors draws your attention to vehicles
detected in the monitored area. If you then
switch on the corresponding turn signal to
chang elane, you will also receive an optical
and audible collisio nwarning. For monitoring,
Active Blind Spot Assis tuses sensor sinthe
rea rbumper. G
WARNING
Blind Spot Assis tiso nly an aid designe dto
assis tdriving. It may fail to detec tsome vehi-
cles and is no substitute for attentive driving.
Blin dSpot Assist cannot detect road and traf-
fic conditions. It may fail to detect narrow
vehicles, such as motor cycles or bicycles ,or
only detec tthem too late.
Monitorin gmay be affected by dirty sensors,
stron gspray or poor visibility caused by snow,
rain or mist, for example. In this case, vehicles
are detected late or not at all.
Alway spay attention to traffic conditions and
your surroundings. Otherwise ,you may fai lto
recognise dangers in time ,cause an accident
and injure yourself and others.
The radar senso rsystem is automatically
deactivated near radio telescope facilities
(Y page 380).
For Blind Spot Assist to assist you when driv-
ing, the radar sensor syste mmust be activa-
ted (Y page 249 )and operational. 208
Drivin
gsystemsDrivin gand parking

Mon
itoring range of the sensors
Blind Spot Assist monitors the area up to
three metres behind you rvehicle and direc tly
next to you rvehicle, as shown in the diagram. G
WARNING
Blin dSpot Assist monitors cer tain areas in the
immediate vicinit yofyour vehicle. Vehicles
that approach and driv epast at high speeds
are not detected. There is no display and no
warning.
If the lanes are very wide, it may not be pos-
sible to monitor the complete width of the
neighbouring lane. For this reason, vehicles in
the next lane may not be detected, especially
if they are driving in astaggered formation in
different lanes .This ma ybethe case if vehi-
cles ar edriving at th eedge of their lane that
is furthest away from your vehicle.
Alway spay attention to traffic conditions and
your surroundings. Otherwise ,you may fai lto
recognis edangers in time, cause an accident
and injure yourself and others.
If the lanes are narrow, vehicles driving in the
lane beyond the lane next to your vehicle may
be indicated, especially if the vehicles are not
driving in the middle of their lane. This may
be the case if the vehicles are driving on the
inner side of their lane. Due to the nature of the system:
R
warnings may be issue dine rror when driv-
ing close to cras hbarriers or similar solid
lane borders.
R warnings may be interrupted when driving
alongside long vehicles, such as lorries, for
ap rolonged time.
Th et wo sensors for Blind Spot Assist are
integrated into the sides of the rear bumper.
Make sure that the bumper is free of dirt, ice
or slush in the vicinit yofthe sensors. The
radar sensor smust not be covered, for exam-
ple by cycle racks or overhanging loads .Fol-
lowin gasevereimpact or in th eevent of dam-
ag etot he bumpers, hav ethe func tion of the
radar sensor schecked at aqualified special-
ist workshop, e.g. aMercedes-Ben zService
Cent re.B lind Spot Assist may otherwise not
work properly.
Indicator and warning display :
Yellow indicator lamp/red warnin glamp
If Blind Spot Assis tiss witched on, indicator
lamp :in the exterior mirror slights up yel-
low up to aspeed of 30 km/h. At speeds
above 30 km/h, the indicator lamp goes out
and Blin dSpot Assist is operational.
If av ehicle is detected within the monitoring
range of Blin dSpot Assist at speeds above
30 km/h, warning lamp :on the cor re-
spondi ngside light supinred. This warning is
always emit tedw hen avehicle enters the
blind spot monitorin grange from behind or
from the side. When you overtake avehicle, Driving systems
209Drivingand parking Z

The warnin
gvibration occur searlier if:
R you approach the outer lane markin gona
bend.
R the road has ver ywide lanes, e.g. amotor-
way.
R the system recognises solid lane markings.
The warnin gvibration occur slater if:
R the road has narrow lanes.
R you cut the corner on abend. Active Driving Assistance package
General notes The Active Drivin
gAssistanc epackage con-
sists of DISTRONIC PLUS (Y page 174), Active
Blind Spot Assis t(Ypage 212) and Active
Lan eKeeping Assist (Y page 215).
Active Blind Spot Assist Important safety notes
Active Blin dSpot Assist uses aradar sensor
system to monitor the side areas of your vehi-
cle which are in back of the driver. Awarning
display in the exter iormirror sdraws your
attention to vehicles detected in the moni-
tored area. If you then switch on the corre-
sponding turn signal to change lane, you will
also receive an optical and audible collision
warning. If arisk of lateral collision is detec-
ted, corrective brakin gmay help you avoid a
collision. To support the course-correcting
brake application, Active Blind Spot Assist
also uses the forward-facin gradar senso rsys-
tem. Active Blind Spot Assist supports you
from aspeed of approximately 30 km/h. G
WARNING
Active Blin dSpot Assist is only an aid and may
detect vehicles/obstacles incor rectly or not
at all. Th
es ystem may be impaired or may not func-
tion if:
R there is poo rvisibility, e.g. due to snow,
rain, fog or spray.
R the rear and/or fron tsensors are dirty.
Active Blin dSpot Assist may not detect nar-
row vehicles, such as motor cycles or bicycles,
or only detect the mtoo late. It can notd etect
vehicles which are overtaken at asmall dis-
tance and then enter th eblind spot area.
Active Blind Spot Assist cannot detect road
and traffic conditions. It is not asubstitute for
attentive driving. You are responsible for the
vehicle's speed, braking in good time, and
steering correctly. Always adapt your driving
style to suit the prevailing road and weather
conditions. Always pay attention to traffic
conditions and your surroundings. Otherwise,
you may fail to recognise dangers in time,
cause an accident and injure yourself and oth-
ers.
The radar sensor syste misautomatically
deactivated near radio telescope facilities
(Y page 380).
For Active Blind Spot Assis ttoassist you
when driving, the radar sensor syste mmust
be activated (Y page 249)and operational.
Monitoring range
Active Blind Spot Assist monitors the area up
to three metres behind your vehicl eand
directl ynext to your vehicle as shown in the
diagram. For this purpose, Active Blin dSpot
Assist uses rada rsensors in the rear bumper. 212
Driving systemsDriving and parking

G
WARNING
Active Blind Spo tAssist monitor scertain
areas in the immediate vicinity of your vehicle.
Vehicles that approach and drive past at high
speeds are not detected. No visual nor audi-
ble warnings are emitted and the syste mdoes
not brake the vehicle to cor rect your course.
If the lane sare very wide, it may not be pos-
sibl etom onitor the complet ewidth of the
neighbourin glane. For this reason, vehicles in
the nex tlane may not be detected, especially
if they are driving in astaggered formation.
Thi sm ay be the case if vehicles are driving at
the edge of their lane that is furthest away
from your vehicle.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and others.
If the lanes are narrow, vehicles driving in the
lane beyond the lane nex ttoyour vehicle may
be indicated, especially if the vehicles ar enot
drivin ginthe middle of their lane. This may
be the case if ther eare vehicles at th eedge
of their lane nearest your vehicle. Due to the nature of the system:
R
warnings may be issued in error when driv-
ing close to crash barriers or simila rsolid
lane borders.
R warnings ma ybeinterrupted whe ndriving
alongsid elong vehicles, such as lorries, for
ap rolonged time.
Tw oA ctive Blind Spo tAssist radar sensors
ar ei ntegrated into the front and rear bumpers
respectively. An additional radar sensor is
locate dbehind the cover in the radiator grille.
Make sure that the bumper sare free of dirt,
ice or slus haround th esensors. The rear sen-
sors must not be covered, e.g. by bicycle
racks or overhanging loads. Followin ga
severe impac torinthe even tofdamage to
the bumpers, have the function of the radar
sensors checked at aqualified specialist
workshop. Blind Spot Assis tmay otherwise
not work properly.
Indicator and warning display :
Yellow indicator lamp/red warning lamp
When Active Blind Spot Assis tisa ctivated,
indicator lamp :in the exte rior mirror slights
up in yellow at speeds of up to 30 km/h. At
speeds above 30 km/h, the indicator lamp
goes out and Active Blind Spot Assist is
operational.
If av ehicle is detected within the monitoring
range of Blin dSpot Assist at speeds above
30 km/h, warning lamp :on the corre-
sponding side lights up red. This warning is
always emit tedw hen avehicle enter sthe
blin dspot moni toring range from behind or Drivin
gsystems
213Drivingand park ing Z

Delayed switch-off of the exterio
rlight ing is
reactivate dthe nex ttime yo ustart the
engine.
Activating/deactivating the interior light-
in gd elay ed switch -off
If yo uactivat ethe Interior lighting delay sw. off function, the
interiorlighting
remain sonfor 20 seconds after you rem ove
th ek ey fr om th eignition lock.
X Press the =or; button on the steer-
ing wheel to selec tthe Settings menu.
X Press the :or9 button to selec tthe
Light submenu.
X Press the abutton to confir m.
X Press the :or9 button to select the
Interior lighting dela ysw. off: function.
Yo
uw ill see the selected setting: on or
off .
X Press the abutton to save the setting.
Vehicle Setting permanent SPEEDTRONIC
You can set permanent SPEEDTRONIC
(Y page 174 )using the Limitspeed (win‐ ter tyres) function.
X Press the =or; buttononthe steer-
ing wheel to selec tthe Settings menu.
X Press the :or9 button to selec tthe
Vehicle submenu.
X Press the abutton to confir m.
X Press :or9 to select the Limit spee
d(winter tyres): function.
Yo uw ill see the current setting.
X Press the abutton to confir m.
X Press :or9 to adjust permanent
SPEEDTRONIC in increments of 10
(24 0k m/h to
160 km/h ). The
Off setting
switches permanen tSPEEDTRONIC off.
X Press the abutton to store the entry. Switching th
eautomatic lockin gfeatu re
on/off
If you select the Automatic door lock func-
tion, the vehicle is centrally locked above a
speed of around 15 km/h.
i For further information on the automatic
locking feature, see (Y page 78).
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Vehicle submenu.
X Press the abutton to confir m.
X Press the :or9 button to select the
Automati cdoor lock function.
Yo uw ill see the selected setting: on or
off .
X Press the abutton to save the setting.
Activating/deactivating the acoustic
locking confirmation
If you switch on the Acoustic Lock feed‐ back func
tion, an acoustic signal sounds
when you lock the vehicle.
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Vehicle submenu.
X Press the abutton to confir m.
X Press the :or9 button to select the
Acoustic Lock feedback: function.
You will see the selected setting: Activa‐ ted or
Deactivated .
X Press the abutton to save the setting.
Activating/deactivating th eradar sensor
system
i Youm ust deactivate the radar senso rsys-
tem in certain countries and near radio
telescope facilities .For further informa-
tion ,see (Y page 380).
When you are close to radi otelescope facili-
ties, the rada rsensor system will be deacti-
vated automatically. Menu
sand submenus
249On-boardcomput er anddisplay s Z

The following system
sare switche doff when
th er adar senso rsystem is deactivated:
R DISTRONIC PLUS (Y page 174)
R BAS PLUS (Y page 62)
R PRE-SAFE ®
Brake (Y page 66)
R Blind Spot Assist (Y page 208)
R Active Blind Spot Assist (Y page 212)
X Press the =or; button on the steer-
ing whee ltoselect the Settings menu.
X Press the :or9 button to select the
Vehicle submenu.
X Press the abutton to confirm.
X Press the 9or: button to select
Rada rsensor (See Owner's Man.): .
Yo uw ill see the selected setting: on or
off .
X Press the abutton to save the setting.
Heating menu Auxiliary heating depa
rtur et ime
This function is only availa bleo nvehicles with
auxiliar yheatin g(Ypage 130).
In the Heating submenu, you can select a
stored departure tim eorchange adeparture
time.
The auxiliar yheatin gtimer func tion calcu-
lates the switch-on tim eaccording to the out-
sid etemperature so that the vehicle is pre-
heated by the departure time. When the
departure tim eisreached, the auxiliar yheat-
ing continues to heat for afurther five
minutes and then switches off. The auxiliary
heating adopts the THERMATI Cor
THERMOTRONI Ctemperature setting.
You can switc hoff th eauxiliary heating by
using the remote control or the auxiliary heat-
ing button on the centre console. G
WARNING
Exhaust fumes are produced when the auxili-
ary heating is in operation. Inhaling these
exhaust fumes can be poisonous. You should
therefore switch off the auxiliary heating in confined spaces without an extraction sys-
tem, e.g.
agarage. G
WARNING
When operating the auxiliary heating parts of
the vehicle can get very hot. Make sure that
the exhaust system does not under any cir-
cumstances come into contact with easily
ignitable material such as dry grass or fuels.
The material could otherwise ignite and set
the vehicle alight. Choos eyour parkin gspot
accordingly.
Operating the auxiliary heating is thus pro-
hibited at fillin gstations or when your vehicle
is being refuelled .You must therefore switch
off the auxiliar yheatin gatf illing stations.
! Operating the auxiliary heating/ventila-
tion draws on the vehicle battery. After you
have heated or ventilated the vehicle a
maximum of two times, drive for alonger
distan ce.
i Switch the auxiliary heating on regularly
once amonthfor about 10 minutes.
Selecting th edepartur etime or deactivat-
ing aselected depa rtur et ime
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Heating submenu.
X Press the abutton to confirm.
You will see the selected setting.
X Press the abutton to confirm.
X Press the :or9 button to select
one of the three departur etimes or Timer off (no timer active).
X Press the abutton to confirm.
When adeparture tim eisselected, the yel-
low indicator lam plights up on the auxiliary
heating button. 250
Menus and submenusOn-board computer and displays

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