2011 MERCEDES-BENZ M-CLASS SUV door lock

Child-proof locks
Important safety notes G
WARNING
Activate th echild-proo flocks for th erear
door sand the override switch for the rear
windows whe nchildren are travelling in the
vehicle. Otherwise, the chil dren could open
doors or side windows while the vehicle is in
motion and injure themselv esor others. G
WARNING
Do not leave children unsupervised in the
vehicle, even if they are secur edinac hild
restraint system .They coul dinjure them-
selve sonp arts of the vehicle. They could also
be seriousl yoreven fata llyi njured by pro-
longed exposure to extreme hea torcold.
Do not expose the child restraint system to
direct sunlight. Part softhe chil drestraint sys-
tem could heat up and the child could burn
herself/himself on them.
If ac hild opens adoor, the child or other per-
sons coul dbeinjured as aresult. They could
get out and injure themselves or be injured by
ap assing vehicle.
Also observe the notes on HOLD. Relevant
information can be found in the index.
Child-proof locks for the rear doors You secure each door individually with the
child-proo flocks on the rea rdoors. Adoor
secured with achild-proof lock can notbe
opened from inside the vehicle. When the
vehicle is unlocked, the door can be opened
from the outside. X
To activate: press the child-proof lock
leve rupint he direction of arrow :.
X Make sur ethat the child-proof lock sare
workin gproperly.
X To deactivate: press thechild-proof lock
lever down in the direction of arrow ;.
Overrid efeature for the rear side win-
dows X
To activate/deactivate: press button:.
If indicator lamp ;is lit, operation of the
rear side windows is disabled. Operation is
only possible using the switches in the driv-
er' sd oor. If indicator lamp ;is off ,oper-
ation is possible using the switches in the
rear compart ment. Driving safety systems
Driving safety systems overview
In this section, you will find information about
the following driving safety systems: 60
Drivin
gsafety systemsSafety

The radar sensor system must be switched off
using the on-boar dcomputer in the vicinit yof
radio telescop efacilities in the following vehi-
cles:
R vehicles without COMAND Online and nav-
igation
R vehicles without Audio 20 and Becker ®
MAP PILOT
R vehicles for Australia
Information about switching off the rad ar sen-
so rs ystem using the on-board computer can
be found in the "On-board computer and dis-
plays “section (Y page 249).
For PRE- SAFE®
Brake to assist you whe ndriv-
ing ,the radar sensor system must be
switc hed on (Y page 249) an dbeopera-
tional.
Followin gdamage to the fron tend of the vehi-
cle ,havet he configuration and operation of
the radar sensors checked at aqualified spe-
cialist workshop. This also applie stoc olli-
sions at slow speeds where ther eisnovisible
damage to the fron tofthe vehicle. STEE
RCONTROL
The steering assistan tSTEE RCONTROL helps
you by transmittin ganoticeable steering
force to the steering wheel in the direction
required for vehicle stabilisation.
This steering assistance is provided in partic-
ular if:
R both right wheels or both left wheels ar eon
aw et or slippery road surface when you
brake
R the vehicle starts to skid
You have control over the steerin gatall
times. G
WARNING
If there is an ESP ®
malfunction, you will not
receiv eany steering assistance from the
STEER CONTROL. The steering continues to
function with steering assistance. Anti-theft systems
Immobiliser
The immobilise rprevents your vehicl efrom
being starte dwithout the correct key.
X To activate with the key: removethe key
from the ignition lock.
X To activate wit hKEYLESS-GO: switch the
ignition off and open the driver' sdoor.
X To deactivate: switchont he ignition.
i The immobiliser is always deactivated
when you star tthe engine. ATA (Anti-Thef
tAlarm system)
Av isual and audible alarm is triggered if the
alarm system is prime dand you ope n:
R ad oor
R the vehicle with the emergency key ele-
ment
R the tailgate
R the bonnet
The alar misnot switched off ,even if you
close th eopen door that has triggere dit, for
example. X
To prime: lock the vehicle with the key or
KEYLESS-GO.
Indicator lamp :flashes. The alarm sys-
tem is primed after approximately 15 sec-
onds.
X To deactivate: unlock the vehicle with the
key or KEYL ESS-GO.68
Anti-thef
tsystemsSafety

X
To sto pthe alarm using the key: insert
th ek ey into the ignition lock.
The alarm is switched off.
or
X Pres sthe % or& button on the key.
The alarm is switched off.
X To stop th ealarm using KEYLESS-GO:
grasp the outside door handle. The key
must be outside the vehicle.
The alarm is switched off.
or
X Press the Star t/Stopbutton on the dash-
board. The key must be inside the vehicle.
The alarm is switched off. Tow-away protection
An audible and visual alarm is triggered if your
vehicle's angle of inclination is altered while
tow-away protection is primed. This occurs if
the vehicle is jacked up on one side ,for exam-
ple.
X To pri me:lock the vehicle with the key or
KEYLESS-GO.
Tow-away protection is primed after
approximately 30 seconds.
X To deactivate: unlock the vehicle with the
key or KEYLESS-GO.
Tow-away protection is deactivated auto-
matically.
To prevent afalse alarm, deactivate tow-away
protection manually if your vehicle:
R is being transported
R is being loade donto aferr yorc ar trans-
porter, for example
R is parked on amovable surface, e.g. in a
split-leve lgarage
Deactivating:
X Remove the key from the ignition lock. X
Press button :.
Indicator lamp ;lights up briefly.
X Lock the vehicle with the key or KEYLE SS-
GO.
Tow-awa yprotectio nisdeactivated.
Tow-away protection remains deactivated
until:
R the vehicle is unlocked again.
R ad oor is opened and closed again.
R the vehicle is locked again. Interior motion sensor
If the interior motion sensor is primed, avis-
ual and audible alarm is triggered if move-
ment is detected in the vehicle interior while
the vehicle is locked. This occur sifsomeone
reaches int othe vehicle interior, for example.
To activate:
X Make sur ethat the side windows and the
slidin gsunroof/panorama sliding sunroof
are closed.
This will prevent false alarms.
X The interior motion senso risp rime dafter
approximately 30 seconds.
To switch off:
X Unlock th evehicle with the key or KEY-
LESS-GO.
The interior motion sensor is deactivated
automatically. Anti-theft systems
69Safety Z

To prevent
afalse alarm, deactivate the inte-
rior motion senso rifyou lock your vehicle
and:
R people or animals remain in the vehicle.
R the side window sremai nopen.
R the sliding sunroof/panorama sliding sun-
roof remains open.
Deactivating:
X Remov ethe key from the ignition lock. X
Press button :.
Indica torlamp ;flashes briefly.
X Lock the vehicle with the key or KEYLESS-
GO.
The interior motion senso risd eactivated.
The interior motion sensor remains deactiva-
ted until:
R the vehicle is unlocked again.
R ad oor is opened and closed again.
R the vehicle is locked again.
i UK only: Your vehicle is equipped with a
double lock func tion. The doors can notbe
opened from the inside if the vehicle was
locked with the key or with KEYLESS -GO
( Y page 77). Deactivat ethe interior
motion sensor before lockin gthe vehicle.
The doors can then be opened from the
insid eafter th evehicle has been locked
from the outside. Observ ethe "Important
safety notes" (Y page 77).70
Anti-theft systemsSafety

Usefu
linfor mati on
i This Owner's Manual describes all models
and all standard and optional equipment
available to your vehicle at the time of pub-
lication of the Owner's Manual. Country-
specific deviation sare possible .Please
not ethat your vehicle ma ynot be equipped
with all featur es described. This also
applies to safety-releva ntsystems and
functions.
i Please read the information on qualified
specialist workshops (Y page 24).Key
Key functions
Locking and unlocking centr ally The key centrally locks/unlocks:
R the doors
R the tailgate
R the fuel filler flap G
WAR
NING
Only for the Unite dKingdom: if the vehicle
has been locked with the key or with KEY-
LESS-GO, the double lock function is activa-
ted as standard. It is then not possible to open
the doors from inside the vehicle.
Therefore, do not leave any people behind in
the vehicle, particularly children ,elderly peo-
ple or people requirin gspecial assistance. As
ar esult, they may not be able to free them-
selves in the event of an emergency. They
could be seriously or even fatally inju redby
prolonged exposure to extremely high or low
temperatures, for example. In this case, res-
cuin gpeople from outside the vehicle is diffi-
cult.
Deac tivate th einterior motion sensor before
you lock the vehicle. The doors can then be
opened from the inside after the vehicl ehas
been locked from the outside. G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open adoor from inside the vehicle at any
time, even if it has been locked
R star tthe vehicle usin gakey which has been
left in the vehicle
R release the electric parking brake
They could thereby endanger themselves and
others. Never leave children unsupervised in
the vehicle. Alway stake the key with you
when leaving the vehicle, even if you are only
leaving it for ashort time. G
WARNING
If ak ey rin gistoo heavy or too large, the
weight actin gonthe key coul dcause it to turn
in the ignition lock or catc honthe steering
wheel. This coul dcause the engine to be
switched off suddenly. You may lose control
of the vehicle and cause an accident. Do not
attac hany heavy or large key rings to the key
that is inserted in the ignition. :
& To lock the vehicle
; F To open/clos ethe tailgate
= % To unlock the vehicle
When unlocking, the tur nsignals flash once.
When locking, they flash three times.
When it is dark, the surroun dlighting also
comes on if it is activated in the on-board
computer (Y page 248).
You can also set an audible signal to confirm
that the vehicle has been locked. The audible 72
KeyOpening and clos
ing

signa
lcan be activated and deactivated using
the on-board computer (Y page 249).
X To unlock centrally: press the%but-
ton.
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
R the vehicle is locked again.
R the anti-theft system is primed again.
X To lock centrally: press the&button. KEYLESS-GO
You can start, lock or unlock the vehicle using
KEYLE SS-GO. To do this ,you only need carry
the key with you. When you touc hthe surface
of the sensor sonthe vehicle' soutside door
handles ,KEYLESS-GO establishes aradio
connection between the vehicle and the key.
When the engine is started and whils tyou are
driving, KEYLE SS-GO also checks whether a
valid key is in the vehicl ebyperiodically
establishing radi ocontact.
When locking or unlockin gwith KEYLESS-GO,
the distance between the key and the door
handle you wish to lock or unlock must not
be greater than 1m. X
To unlock the vehicle: touch the inner
surface of the doo rhandle.
X To lock the vehicle: touch sensorsur-
face :.
X Convenienc eclosing feature: touch
recessed sensor surface ;for an exten-
ded period (Y page 85). If you pull on the handle of the tailgate, only
the luggage compartmen
tofthe vehicle is
unlocked. Changing th
esettings of the locking
system
You can change the setting of the locking
system in such away that only the driver's
door and the fuel filler flap are unlocked. This
is useful if you frequently travel on your own.
X To change the setting: press and hold
down the %and& buttons simulta-
neously for approximately six seconds until
the battery check lamp (Y page 74)
flashes twice.
i If the setting of the locking system is
changed within the signal range of the vehi-
cle, pressing the &or% button locks
or unlocks the vehicle.
The key now function sasfollows:
X To unlock th edriver's door: press the
% button once.
X To unlock centrally: press the%but-
ton twice.
X To lock centrally: press the&button.
The KEYLESS-GO function is change dasfol-
lows:
X To unlock th edriver's door: touch the
inner surface of the doo rhandle on the
driver' sdoor.
X To unlock centrally: touchthe inner sur-
face of the door handl eonthe front-
passenger door or the rea rdoor.
X To lock centrally: touchthe outer sensor
surface on one of the door handles. Restoring th
efactory settings
X Press the %and& button ssimulta-
neously for approximately six seconds until
the battery check lamp flashes twice. Key
73Opening and closing Z

Problems wit
hthe key Problem Possible causes/consequences and
M Solutions
Yo
uc annot lock or
unlock the vehicle
using the key. The key battery is discharged or nearly discharged.
X Try again to lock/unlock the vehicle using the remote control
function of the key. Point the tip of the key at the driver' sdoor
handl efrom close rang eand pres sthe % /& button.
If this does not work:
X Chec kthe key battery (Y page 74)and replace it if necessary
(Y pag e75).
X Lock (Y page79) or unlock (Y page79) the vehicl eusing
the emergenc ykey element. The key is faulty.
X Loc k(Ypage 79 )orunlock (Y page79) the vehicl eusing
the emergenc ykey element.
X Hav ethe key chec kedataq ualified specialist workshop. You can no longer lock
or unlock the vehicle
using KEYLESS-GO. There is interference from
apowerfu lsource of radio waves.
X Lock/unloc kthe vehicle usin gthe remote con trol func tion of
the key. Point the tip of the key at the driver's door handl efrom
close rang eand pres sthe % /& button. There is
afault with KEYLESS-GO.
X Lock/unlock the vehicle using the remote control function of
the key. Point the tip of the key at the driver' sdoor handl efrom
close rang eand pres sthe % /& button.
X Hav eKEYLESS-GO checked at aqualified specialist workshop.
If this does not work:
X Check the key battery (Y page 74) and replace it if necessary
(Y page 75).
X Lock (Y page 79) or unlock (Y page 79) the vehicle using
the emergency key element. You have lost
akey. X
Hav ethe key deactivated at aqualified specialist workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the emer-
gency key element. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. 76
KeyOpenin
gand closing

Problem Possible causes/consequences and
M Solutions
The engin
ecannot be
started using the key. The on-board voltage is too low.
X Switch off non-essential consumers, e.g. seat heating or interior
lighting ,and try to start the engine again.
If this doe snot work:
X Check the starter battery and charge it if necessary
(Y page 343).
or
X Jump-start the vehicle (Y page 348).
or
X Consult aqualified specialist workshop. The engine cannot be
started using KEYLESS-
GO. The key is in the
vehicle. Ad
oor is open. Therefore, the key can notb ed etected as easily.
X Close the door and tr ytostart the vehicle again. There is interferenc
efrom apowerfu lsource of radio waves.
X Start your vehicle with the key in the ignition lock. Doors
Important safety notes
G
WARNING
Only fo rthe Unite dKingdom: if the vehicle
has been locked with the key or with KEY-
LESS-GO, the double lock func tion is activa-
ted as standard. It is then not possible to open
the doors from inside the vehicle.
Therefore, do not leav eany people behind in
the vehicle, particularly children, elderly peo-
ple or people requiring special assistance .As
ar esult, they may not be able to free them-
selves in the event of an emergency. They
could be seriously or even fatally injured by
prolonged exposur etoextremely hig horlow
tempera tures, for example. In this case ,res-
cuin gpeople from outside the vehicle is diffi-
cult.
Deac tivate the interior motion sensor before
you lock the vehicle .The doors can then be
opened from the insid eafter the vehicl ehas
been locked from the outside. G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open adoor from inside the vehicle at any
time, even if it has been locked
R star tthe vehicle usin gakey which has been
left in the vehicle
R release the electric parking brake
They could thereby endanger themselves and
others. Never leave children unsupervised in
the vehicle. Alway stake the key with you
when leaving the vehicle, even if you are only
leaving it for ashort time. Unlocking and opening th
edoors
from the inside
For all countries except the United King-
dom: you can open adoor from inside the
vehicle even if it has been locked.
Only for th eUnited Kingdom: if the vehicle
has been locked with the key or with KEY-
LE SS-G O, the doubl elock function is activa-
ted as standard. It is then not possible to open Doors
77Opening and closing Z