2011 MERCEDES-BENZ M-CLASS SUV parking sensors

obstacles, for example stopped or parked
vehicles.
If you approach an obstacle and PRE-
SAFE®
Brake detects arisk of acollision ,the system
will initiall yalert you both visually and acous-
tically. If you do not brake or take evasive
action, the system will warn you by automat-
ically brakin gthe vehicle gently. If ther eisan
increased risk of collision, preventative
passenger protection measures (PRE-SAFE ®
)
are activated (Y page 45). If the risk of colli-
sion remains and you do not brake, take eva-
sive action or accelerate significan tly, the
vehicle may perform automatic emergency
braking. Automatic emergency braking is not
performed until immediately prior to an acci-
dent that can no longe rbea voided. G
WARNING
Even if PRE-SAFE ®
Brake slow sthe vehicle
befor eani mminent rear-en dcollision ,the
system can nota vert acollision withou tthe
intervention of the driver .There is arisk of an
accident .Brake according to th esituation or
take evasive action. Delayed intervention by
the driver can lead to an accident. G
WARNING
PRE-SAFE ®
Brak ecannot alway sclearly iden-
tify object sand comple xtraffic conditions.
In thes ecases, PRE-SAFE ®
Brake may:
R give an unnecessary warning and then
brake the vehicle
R not give awarning or intervene
There is arisk of an accident .Always pay par-
ticular attention to the traffic situation and be
ready to brake, especially if PRE-SAFE ®
Brake
warns you. Terminat ethe interv entionina
non-critical drivin gsituation.
In particular, the detec tion of obstacles can
be impaired if there is:
R dir tont he sensors or any thing else cover-
ing the sensors
R snow or heavy rain
R interference by other radar sources R
the possibility of strong radar reflections,
for example in multi-storey car parks
R an arrow vehicle travellin ginfront,e.g. a
motorbike
R av ehicle travellin ginfront on adifferent
line G
WAR
NING
PRE-SAFE ®
Brak edoes not react:
R to people or animals
R to oncomin gvehicles
R to cr ossin gtraffic
R when cornering
As aresult ,PRE-SAFE ®
Brak emay not give
warnings or intervene in critical situations.
There is arisk of an accident .Always pay
careful attention to the traffic situation and be
ready to brake.
In order to maintain the appropriate distan ce
to the vehicle in front and thus prevent acol-
lision ,you must apply the bra kesy ourself.
X To activate/deac tivate: activate or deac-
tivate PRE -SAFE®
Brak eint he on-board
compute r(Ypage 24 5).
The Ä symbol appear sinthe multifunc-
tion displa yaslong as the HOL Dfunction
is not activated (Y page 187).
On vehicles with Active Parking Assist ,the
Ä symbolisd isplayed when Pis
engaged or you are driving faste rthan
35 km/h.
The radar sensor system is switched off auto-
matically in the vicinit yofradio telescope
facilities in the following vehicles:
R vehicles with COMAND Online and naviga-
tion
R vehicles with Audio 20 and Becker ®
MAP
PILOT
Becker ®
MAP PILOT must be connected;
see the separate Audio 20 operating
instructions. Driving safety systems
67Safety Z

G
WARNING
DISTRONIC PLUS canno ttake account of road
and traffic conditions. If DISTRONI Cdoes not
recognise or no longer recognises the vehicle
in front, do not activate DISTRONIC or, if it is
alr eady active, deactivate it. This is especially
the case:
R befor ecorners
R on filter lanes
R when changing to alane with faster moving
traffic
R in comple xdriving situations or where lanes
are diverte d,e.g. at roadworks on amotor-
way
DISTRONIC PLU Sotherwise maintains the
current spe ed setbyyou or accelerates up to
the set speed.
DISTRONIC PLU Scannot take account of
weather conditions. Deactivate, or do not
activate, DISTRONI CPLUS:
R if th eroads are slippery, snow-covered or
icy .The wheels coul dlose their grip when
brakin goraccelerating .The vehicle could
star ttos kid.
R if the sensors are dirty or there is poo rvis-
ibility, e.g. due to snow, rain or fog. Dis-
tance control may be impaired.
Always pay attention to traffic conditions
even when DISTRONIC PLU Sisactivate d.
Otherwise, you ma yfail to recognise dangers
in time, caus eanaccident and injure yourself
and others. G
WARNING
DISTRONIC PLUS brake syourvehicle up to a
maximu mof4m /s2
depending on its speed.
This corresponds to approximately 40% of
your vehicle's maximum braking power. You
must als oapply the brakes yourself if this
braking power is not sufficient.
If DISTRONI CPLUS detects arisk of collision
with avehicle in front, an intermit tent warning
tone sounds. In addition, the ·distance
warning lamp in the instrument cluste rlights
up. Brak etoavoidac ollision. G
WAR
NING
The vehicle can be braked when DISTRONIC
PLUS is activated. For this reason, deactivate
DISTRONIC PLUS if the vehicle is to be set in
motion by othe rmeans (e.g. in acar wash or
by towing).
The radar senso rsystem is automatically
deactivated near radio teles cope facilities
(Y page 38 0).
If you want DISTRONIC PLUS to assist you,
the radar sensor syste mmust be activated
(Y page 249 )and operational.
General notes DISTRONIC PLUS regulates the speed and
automati cally helps you maintain the dis-
tanc etot he vehicle detected in front. It
brakes automatically in orde rtoavoid
exceedi ngthe set speed.
On long and stee pdownhil lgradients, espe-
ciall yifthe vehicle is laden or towing atrailer,
yo um ust select shift range 1,2or 3in good
time. By doing so, you will make use of the
braking effec tofthe engine. This relieves the
load on the brake system and prevents the
brakes from overheating and wearing too
quickly.
If DI STRONIC PLUS detects aslower-moving
vehicle in front ,your vehicle is braked in order
to maintain the preset distance to the vehicle
in front.
If ther eisnov ehicle in front ,DISTRONIC
PLUS operate sinthe sam eway as cruise
control in the spee drange between
30 km/h and 200 km/h. If avehicle is driving
in fron tofyou, DI STRONIC operates in the
speed range betwee n0km/h and
200 km/h.
Do not us eDISTRONIC PLUS on roa dswith
steep gradients. Driving systems
175Drivingand parking Z

PARKTRONIC
Important safety notes G
WARNING
PARKTRONI Cisonly an aid and may not
detect all obstacles .Itisnotas ubstitute for
attentive driving.
You are always responsible for safety and
must continue to pay attention to your imme-
diate surroundings when parking and
manoeuvring. You could otherwis eendanger
yourself and others. G
WARNING
Make sure that no persons or animals are in
the manoeuvring range. Otherwise, they
could be injured.
PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It indicates visual lyand
audibly the distance between your vehicle
and an object.
PARKTRONIC is activated automatically if
you:
R switch on the ignition
R shift the transmissio ntoposition D,Ror N
R release the electric parkin gbrake
PARKTRONIC is deactivate datspeeds above
18 km/h. It is reactivated at lower speeds.
PARKTRONI Cmonitor sthe area around your
vehicle usin gsix sensors in the front bumper
and four sensors in the rear bumper. :
Example: sensors in the front bumper,
left-han dside Range of the sensors Genera
lnotes
The sensors must be free of dirt, ice and
slush; otherwise, they may not func tion cor-
rectly. Clean the sensor sregularly, taking
car enot to scratc hordamage them
(Y page 327). Side view
Top view
Front sensors
Centre approximately 100 cm
Corners approximately 60 cm
Rear sensors
Centre approximately 120 cm
Corners approximately 80 cm
!
When parking, pay particular attention to
objects above or below the sensors, such
as flower pots or trailer drawbars. PARK-
TRONIC does not detect such objects when
they are in the immediate vicinity of the Driving systems
191Drivingand parking Z

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

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