sensor MERCEDES-BENZ GL SUV 2012 Service Manual

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 132). The windscreen is smeared after the vehicle has been cleaned in
ac
ar wash.
X Clea nthe windscreen (Y page 369). 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 145). The windscreen is iced up.
X
De-ice the windscreen (Y page 145). There is dir
tonthe insid eofthe windscreen.
X Clean the insid eofthe windscreen (Y page 369). Lan
eTracking package
General notes The Lane Tracking package consis
tsof Blind
Spot Assist (Y page 238) and Lane Keeping
Assist (Y page 240).
Blind Spot Assist Important safety notes
G
WARNING
Blind Spot Assist is only 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. G
WARNING
Blind Spot Assis tisn ot active at speeds below
30 km/h. The indicator lamps in the exterior
mirror sare yello w.Vehicle sinthe monitoring
range ar ethen not indicated.
Always pay attention to traf ficc ondition sand
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and othe rs.
Ge nera lnotes
Blind Spot Assist uses aradar senso rsystem
to monitor the areas on both side sofyour
vehicle. It supports you from speeds of
30 km /h.Aw arning display in the exterior
mirror sdraws your attentio ntovehicles
detected in the monitored area .Ifyou then
switc hont he cor respondi ng turn signal to 238
Drivin
gsystemsDriving and parking

change lane, yo
uwilla lsor eceive an optical
and audible collisio nwarning. For monitoring,
Active Blin dSpot Assist uses sensors in the
rear bumper.
For Blin dSpot Assist to assist you when driv-
ing, the rada rsensor system must be activa-
ted (Y page 283) and operational.
The rada rsensor system is switched off auto-
maticall yinthe vicinit yofradio telescope
facilities (Y page 433).
Monitoring range of the sensors G
WARNING
Blind Spot Assist monitors certain 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. Blind Spot Assis
tmonitors the area up to
3. 0mb ehind your vehicle and direc tlyn extto
your vehicle, as shown in the diagram.
If the lanes are narrow, vehicles drivin gint he
lan ebeyond th elan en ext to your vehicle may
be indicated, especially if th evehicles are not
drivin gint he midd le of their lane. This may
be th ecase if there are vehicles at th eedge
of their lan eneares tyour vehicle.
Due to th enature of th esystem:
R warnings may be issued in error when driv-
ing close to crash barriers or similar solid
lane borders.
R warnings may be interrupted when driving
alongside long vehicles, for example lor-
ries, for aprolonged time.
Th et wo radar sensors for Blin dSpot Assist
are integrated int othe sides of the rear
bumper .Make sure that the bumper is free of
dirt, ice or slush in the vicinity of the sensors.
The 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 function of the
sensor schecked at aqualified special ist
workshop. Blind Spot Assist may otherwise
not work properly.
Indicator and warning display :
Yello windicato rlamp/red warning lamp
If Blind Spot Assis tiss witched on, indicator
lamp :in the exterior mirrors lights 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. Driving systems
239Driving and parking Z

marking
,the system recognises certai ncon-
ditions and warns you accordingly.
The warning vibration occur searlier if:
R you approach the outer lane markin gona
bend.
R the road has ver ywidel anes ,e.g. am otor-
way.
R the system recognises solid lane markings.
The warning vibration 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 epackag econ-
sists of DISTRONIC PLU S(Ypa ge198), Active
Blind Spo tAssist (Y page 242) and Active
Lane Keeping Assist (Y page 246).
Active Blind Spot Assist Importan
tsafety notes G
WARNING
Active Blind Spo tAssist is only an aid and may
detect vehicles/obstacles incorrectly or not
at all.
The system ma ybeimpaired or may not func-
tio nif:
R there is po orvisibility ,e.g. due to snow,
rain, fog or spray.
R the rear and/or front sensors are dirty.
Active Blind Spot Assist may not detect nar-
row vehi cles, such as motorcycles 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 433).
For Active Blind Spot Assis ttoassist you
when driving, the radar sensor syste mmust
be activated (Y page 283)and operational.
General notes
Active Blind Spot Assist use saradar sensor
system to monitor the area to the sides of
your vehicle which are behind the driver. A
warning display in the exterior mirrors draws
your attention to vehicles detected in the
monitored area. If you then switch on the cor-
responding turn signal to change lane, you
will also receive an optical and audible warn-
ing. If arisk of lateral collision is detected,
corrective brakin gmay help you avoid acol-
lision. To suppor tthe course- correcting brake
application ,Active Blind Spo tAssist uses the
forward-facin gradar senso rsystem. The free
space in the direction of travel is then evalu-
ated.
Active Blind Spot Assist supports you from a
speed of approximatel y30km/h.
Monitorin grange G
WARNING
Active 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. No visual nor audi-
ble warnings are emitted and the system does
not brake the vehicle to correc tyour course.
If the lanes are ver ywide, 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 drivin ginastaggered formation.
Thi sm ay be the case if vehicles are driving at 242
Driving systemsDrivin
gand pa rking

the edge of their lane tha
tisfurthest 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 yoursel fand others. Active Blind Spo
tAssist monitor sthe area up
to 3. 0mbehind your vehicle and directly next
to your vehicle, as shown in the diagram. For
this purpose, Active Blin dSpot Assist uses
rada rsensors in the rear bumper.
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 there are vehicles at the inner
edge of your lane.
Due to the nature of the system:
R warnings may be issued in error when driv-
ing close to crash barriers or similar solid
lane borders.
R warnings may be inter rupted when driving
alongside particularly long vehicles, for
example lorries, for aprolonged time.
Th eA ctive Blind Spo tAssist radar sensor sare
integ rated into the front and rear bumpers
and behind acover in the radiator grille. Make
sure that the bumpers and the cover in the
radiator grille ar efree of dirt, ice or slush. The rea
rsensors must not be covered, e.g. by
bicycle racks or overhanging loads. Following
as ever eimpact or in th eevent of damag eto
the bumpers, have the function of the radar
sensors checked at aqualified specialist
workshop. Active Blind Spot Assis tmay oth-
erwise no longer work properly.
Indicator and warning display G
WARNING
Active Blind Spot Assist is not active at speeds
below 30 km/h. The indicator lamps in the
exterior mirrors are yellow .Vehicles in the
moni toring range are then not indicated.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time and cause an acci-
dent and injure yourself and othe rs. :
Yellow indicator lamp/red warning lamp
If Active Blind Spot Assist is switched on,
indicator lamps :in the exterior mirror slight
up yellow up to aspeed of 30 km/h. At
speeds above 30 km/h, the indicator lamp
goes out and Activ eBlind Spot Assist is
operational.
If av ehicle is detected within the monitoring
range of Blin dSpot Assist at speeds above
approximately 30 km/ h,warning lamp :on
the corresponding side lights up red. This
warning always occurs when avehicle enters
th eb linds pot monitorin grange fro mbehind
or from the side. When you over take avehicle,
the warning only occu rsif the difference in
speed is less than 12 km/h. Drivin
gsystems
243Drivingand parking Z

=
Rev coun ter( Ypage 268)
? Coolan ttemperatur e(Ypage 26 8)
A Multifunction displa y(Ypage 27 0)
B Instrumen tcluster lighting (Y page 268) Instrument cluster lighting
The lighting in the instrument cluster ,inthe
displays and the controls in the vehicle inte-
rior can be adjusted usin gthe brightness con-
trol knob.
The brightness control knob is on the bottom
lef toft he instrumen tcluster (Y page 30).
X Turn the brightness control knob clockwise
or anti-clockwise.
If the light switch is set to Ã,Tor
L,t he brightness is dependant upon
the brightness of the ambient light.
i The light sensor in the instrumen tcluster
automatically controls the brightness of
the multifunction display.
In daylight, the displays in the instrument
cluster are not illuminated. Coolant temperature gauge
The coolant temperature gauge is in the
instrument cluster on the right-hand side
(Y page 30).
Under normal operatin gcondition sand with
the specified coolant level ,the coolant tem-
perature ma yrise to 120 †.
At high outside temperatures and when driv-
ing uphill, the coolant temperature may rise
to the end of the scale. Rev counter
! Do not drive in the overrevving range.
Doin gsow ill damage the engine.
The red band in the rev counter indicates the
engine's overrevving range. The fuel supply is interrupted to protec
tthe
engin ewhen the red band is reached. Outside tem
perature display G
WARNING
At temperatures just above freezing point, the
street may be icy, especially in wooded areas
or on bridges. If you do not adapt your driving
style to the conditio ns,the vehicle coul dskid.
For this reason, adapt your driving style and
speed to the weather conditions.
The outside temperature displa yisinthe mul-
tifunc tion display (Y page 270).
Changes in the outside temperatur eare dis-
played afte rashort delay. Speedomete
rwith segments
The segments in the speedometer indicate
which speed range is avai lable.
R Cruise control activated (Y page 193):
The segment slight up from the stored
speed to the maximum speed.
R Variabl eSPEEDTRONIC activated
(Y page 196):
The segments light up from the star tofthe
scal etot he selected limit speed.
R DISTRONI CPLUS activate d(Ypage 198):
One or two segment sinthe set speed
range light up.
R DISTRONI CPLUS detects avehicle in front:
The segments between the speed of the
vehicle in fron tand the store dspeed light
up. 268
Display
sand operationOn-board computer and displays

If the
Sensors deactivated messa
ge
appears, the radar senso rsystem is deacti-
vated.
X Check whether or not the radar sensor sys-
tem is permitted to be activated
(Y page 433).
X Switc honthe radar sensor system
(Y page 28 3).
Activating/deactivating distance warn-
ing function X
Press =or; on the steering wheel
to select the Assist. menu.
X Press 9or: to select Dist. warn‐
ing .
X Press the abutton.
The curren tselection is displayed.
X To activate/deac tivate: press the a
button again.
When the distanc ewarning function is acti-
vated, the multifunction display shows the
Ä symbol if the HOLD function is not acti-
vated (Y page 211).
Vehicles with Active Parking Assist: if
PARKTRONIC is activated and you are driving
at as peed under 35 km/h, the jActive
Parkin gAssist symbol is shown instead of the
Ä symbol ( Ypage 21 9).
Further information on the distance warning
function (Y page63).
Activating/deactivatin gPRE-SAFE ®
Brake PRE-SAFE
®
Brake is only available in vehicles
with DISTRONIC PLUS.
X Press =or; on the steering wheel
to select the Assist. menu.
X Pres sthe 9 or: button to select
PRE-SA FEBrake .X
Press the abutton.
The curren tselection is displayed.
X To activate/deac tivate: press the a
button again.
When PRE-SAFE ®
Brak eisa ctivated, the mul-
tifunction displa yshows the Äsymbol as
long as the HOL Dfunction is not activated
(Y page 211).
Vehicles with Active Parking Assist: if
PARKTRONIC is activated and you are driving
at as peed under 35 km/h, the jActive
Parkin gAssist symbol is shown instead of the
Ä symbol ( Ypage 21 9).
If the PRE-SA FEBrake: Sensors deacti‐ vated message appears
,the radar sensor
system is deactivated.
X Chec kwhether or not the radar sensor sys-
tem is permi tted to be activated
(Y page 43 3).
X Switch on the radar senso rsystem
(Y page 283).
For more information on PRE-SAFE ®
Brake,
see (Y page 68).
Activating/deactivating ATTENTION
ASSIST X
Press =or; on the stee ring wheel
to select the Assist. menu.
X Pres sthe 9 or: button to select
Attent ionA sst. X
Press the abutton.
The curren tselection is displayed.
X To activate/deac tivate: press the a
button again.
When ATTENTION ASSI STis activated, the
À symbol appears in the multifunction
display when the ignition is on.
For further information about ATTENTION
ASSIST, see (Y page 232).278
Menus and submenusOn-boar
dcomputer and displays

Activating/deactivating Blind Spot
Assist X
Press =or; on thesteering wheel
to select the Assist. menu.
X Pres sthe 9 or: buttontos elect
Blin dSpot Asst. .
X Press the abutton.
Th ec urrent selection is displayed.
X To activate/deactivate: press thea
button again.
If the BlindSpot Assist Sensors deac‐ tivated or
Active blind spot assist. sensor system deactivated message
appears ,the radar sensor system is deacti-
vated.
X Chec kwhether or not the radar sensor sys-
tem is permitted to be activated
(Y page 433).
X Switc hont he radar sensor system
(Y page 283).
For further information about Blind Spot
Assist ,see (Y page 238).
For further information about Active Blind
Spot Assist ,see (Y page 242).
Activating/deactivating Lane Keeping
Assist X
Press =or; on the steerin gwheel
to selec tthe Assist. menu.
X Press the 9or: button to select
Lane Keep .Asst. X
Press the abutton.
Th ec urrent selection is displayed.
X Press ato confirm.
X Press :or9 to set Off ,
Standard or
Adaptive .
X Press the abutton to save the setting.
When Lane Keeping Assis torActive Lane
Keeping Assist is activated, the Ãsymbol
appears in the multifunction displa ywhen the
ignition is on. For further information about Lane Keeping
Assist
,see (Y page 240).
For further information about Active Lane
Keepin gAssist ,see (Y page 245). Service menu
In the
Serv. menu, you have the following
options:
R call up display messages in message mem-
ory (Y page 290)
R restart the tyr epressure loss warning sys-
tem (Y page 401)
R check th etyre pressure electronically
(Y page 402)
R call up service due date (Y page 365) Settings menu
Introduction In the
Settings menu, you have the following
options:
R changing the instrument cluster settings
(Y page 280)
R changing the ligh tsettings (Y page 280)
R changing the vehicle settings
(Y page 283)
R changing the auxiliary heatin gsettings
(Y page 284) Menu
sand submenus
279On-board computer and displays Z

X
Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Light submenu.
X Press ato confirm.
X Press :or9 to select the Light‐ in
gd elayed sw.-off function.
When the Lighting delayed sw.-off function is activated, th
evehicle interior is
displayed in red in the multifunction dis-
play.
X Press the abutton to save the setting.
Vehicle submenu Setting per
manent SPEEDTRONIC
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press :or9 to select the Vehicle submenu.
X Press ato confirm.
X Press the :or9 button to select the
Limit speed (winter tyres): function.
You will see the curren tsetting.
X Press ato confirm.
X Press the :or9 button to adjust
permanen tSPEEDTRONI Cinincrements of
ten (23 0km/h to
160 km/h ). The
Off set-
ting switches permanent SPEED TRONIC
off.
X Press the abuttontos tore the entry.
For furth erinformation on perm anent SPEED-
TRONIC (Y page 198).
Switchin gthe automati clocking feature
on/off
If yo uactivate the Automatic door locks function, the vehicl
eiscentrally locked above
as peed of around 15 km/h.
X Press the =or; button on the steer-
ing whee ltoselectthe Settings men
u.
X Press :or9 to select the Vehicle submenu. X
Press ato confirm.
X Press :or9 to select the Auto‐ matic door locks function.
When the Automaticdoorl ocks func-
ti on is activated, the vehicle doors are dis-
played in red in the multifunction displ ay.
X Press the abutton to save the setting.
For further information on the automatic lock-
ing feature, see (Y page 84).
Activating/deactivating th eacoustic
lockin gconfirmation
If you switch on the Acoustic Lock function,
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 :or9 to select the Vehicle submenu.
X Press ato confirm.
X Press the :or9 button to select the
Acoustic Lock function.
If the Acoustic Lock function is activated,
the & symbol in the multifunction dis-
play lights up red.
X Press the abutton to save the setting.
Activating/deactivating the radar sensor
system
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press :or9 to select the Vehicle submenu.
X Press ato 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.
i You must deactivate the radar sensor sys-
tem in certain countries and near radio
telescope facilities. For further informa-
tion, see (Y page 433). Menus and submenus
283On-board computer and displays Z

When you are close to radi
otelescope facili-
ties, the rada rsensor system will be deacti-
vated automatically.
The following system sare switche doff when
th er adar senso rsystem is deactivated:
R DISTRONIC PLUS (Y page 198)
R BAS PLUS (Y page 62)
R PRE-SAFE ®
Brak e(Ypage 68)
R Blin dSpot Assist (Y page 238)
R Active Blin dSpot Assist (Y page 242)
Heating submenu Auxiliary heating dep
arture time G
WARNING
Exhaus tfumes are produced when the auxili-
ary heating is in operation. Inhaling the se
exhaus tfumes can be poisonous. You should
therefor eswitch off th eauxiliar yheating in
confine dspaces 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 therefor eswitch
off the auxiliary heating at filling 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
distance.
This func tion is only available on vehicles with
auxiliary heatin g(Ypage 148). In the
Heating submenu, you can select a
stored departure tim eorchange adeparture
time.
The auxiliary heatin gtimer func tion calcu-
lates the switch-on tim eaccording to the out-
sid etemperatur esothat the vehicle is pre-
heate dbyt he departur etime. When the
departur etime is reached, the auxiliary heat-
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 remot econtrol or the auxiliar yheat-
ing button on the centre console.
i Swit chthe auxiliary heating on regularly
once amonthfor about ten 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 ato confirm.
You will see the selected setting.
X Press ato confirm.
X Press the :or9 button to select
one of the three departur etimes or Timer off (no timer active).
X Press ato confirm.
If ad eparture tim eisselected, the yellow
indicator lam plights up on the auxiliary
heating button.
Changing the 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 ato confirm.
You will see the selected setting.
X Press ato confirm. 284
Menus and submenusOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
#
Ch
eckb rake pad wear Th
eb rak epads/lining shaver eached their wear limit.
X Visit aqualified specialist workshop. PR
E-SAFE inopera‐ tiv
eS ee Owner's Manual Important functio
nsof PRE-SAFE ®
hav efailed .All other occupant
safet ysystems, e.g. airbags ,remai navailable.
X Visit aqualified specialist worksho pimmediately. PRE-SAFE
Function
scur‐ rently limited See
Owner's Manual Vehicle
swithou tthe Activ eDriving Assistance package: Adaptive
Brake Assist is temporaril yinoperative. Possible causes:
R the function is impaired due to heavy rain or snow.
R the sensor in the bumper is dirty.
R the rada rsensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emit tedbyn earby TV or radi osta-
tions or othe rsources of elect romagnetic radiation.
R AM Gvehicles: ESP ®
is deactiva ted.
R the system is outside the operatin gtemperatur erange.
R the on-board voltage is too low.
Onc ethe causes liste dabove no longer apply, the display message
goes out.
Adapti veBrake Assis tiso perational again.
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 Secure the vehicle against rollin gaway (Y page 181).
X Clean the bumpers (Y page 370).
X Restart the engine.
X AMG vehicles: reactivate ESP ®
(Y page 67). Display messages
297On-boardcomputer and displays Z