door lock MERCEDES-BENZ B-CLASS HATCHBACK 2011 User Guide

You secure each door individually with the
child-proof locks on the rear doors
.Adoor
secured with a child-proof lock cannot be
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
lever up in the direction of arrow :.
X Make sure that the child-proof locks are
working properly.
X To deactivate: press the child-proof lock
lever down in the direction of arrow ;.
Override feature for the rear side win-
dows X
To activate/deactivate: press switch:.
Switch :is pushed in or extended. If the
switch has engaged, operation of the rear
side windows is disabled. Operation is then
only possible using the switches in the driv-
er's door. Driving safety systems
Driving safety systems overview
In this section, you will find information about
the following driving safety systems:
R ABS (Anti-lock BrakingSystem)
R BAS (Brake AssistSystem)
R COLLISION PREVENTION ASSIST (BAS
PLUS and distance warning signal)
R Adaptive brake lamps
R ESP ®
(Electronic StabilityProgram) R
EBD ( electronic brake force distribution)
R STEER CONTROL Important safety notes
G
WARNING
The risk of an accident is significantly
increased by driving too fast. This is particu-
larly the case when cornering as well as on
wet or slippery roads or when driving too close
to the vehicle in front.
The driving safety systems described in this
section can neither reduce this risk nor over-
ride the laws of physics.
For this reason, always adapt your driving
style to the prevailing road and weather con-
ditions. Maintain sufficient distance from
other road users and objects on the road.
If you fail to adapt your driving style, the driv-
ing safety systems can neither reduce the risk
of accident nor override the laws of physics.
Driving safety systems are merely aids
designed to assist driving. You are responsi-
ble for the distance to the vehicle in front, for
vehicle speed and for braking in good time.
Always adapt your driving style to suit the
prevailing road and weather conditions as
well as the traffic conditions, and maintain a
safe distance from the vehicle in front. Drive
carefully.
i Please note that the driving safety sys-
tems described only work as effectively as
possible when there is adequate contact
between the tyres and the road surface.
Pay particular attention to the information
regarding tyres, recommended minimum
tyre tread depths etc. in the "Wheels and
tyres" section (Y page 292).
In wintry driving conditions, always use
winter tyres (M+S tyres) and if necessary,
snow chains. Only in this way will the driv-
ing safety systems described in this section
work as effectively as possible. 62
Driving safety systemsSafety

EBD monitors and controls the brake pres-
sure on the rea rwheels to improve driving
stability while braking.
i Observe the "Important safety notes" sec-
tion (Y page 62). ADAPTIVE BRAKE
ADAPTIVE BRAKE enhances braking safety
and offers increased braking comfort.Ina ddi-
tion to the brakin gfunction ,ADAPTIVE BRAKE
also has the HOLD functio n(Ypage 162 )and
hill start assist (Y page 129). For further
information, see Driving tips (Y page 146).STEER CONTROL
G
WARNING
If there is an ESP ®
malfunction, you will not
receive any steering assistance from the
STEER CONTROL. The steering continues to
functio nwith power assistance.
STEER CONTROL helps you by transmitting a
noticeable 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 are on
a wet or slippery road surface when you
brake.
R the vehicle starts to skid.
You have control over the steering at all
times. Anti-theft systems
Immobiliser
X To activate: remove the key fro mthe igni-
tion lock.
X To deactivate: switch on the ignition. The immobiliser prevents your vehicle from
being started without the correct key.
i
The immobiliser is always deactivated
when you start the engine. ATA (Anti-Theft Alarm system)
X
To prime: lock the vehicle with the key.
Indicator lamp :flashes. The alarm sys-
tem is primed after approximately
15 seconds.
X To deactivate: unlock the vehicle with the
key.
X To stop the alarm: insert the key into the
ignition lock.
The alarm is switched off.
or
X Press the %or& button on the key.
The alarm is switched off.
Av isual and audible alarm is triggered if the
alarm system is primed and you open:
R a door
R the vehicle with the emergency key ele-
ment
R the tailgate
R the bonnet
The alarm is not switched off, even if you
close the open door that has triggered it, for
example. 68
Anti-theft systemsSafety

Tow-away protection
An audible and visual alar mis 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.
To activate:
X Lock the vehicle with the key.
Tow-away protection is primed after
approximately 30 seconds.
To deactivate:
X Unlock the vehicle with the key.
Tow-away protection is switched off auto-
matically. Deactivating:
X
Remove the key from the ignition lock.
X Press button :.
Indicator lamp ;lights up briefly.
X Lock the vehicle with the key.
Tow-away protection is deactivated.
Tow-away protection remains deactivated
until:
R the vehicle is unlocked again.
R a door is opened and closed again.
R the vehicle is locked again. To prevent a false alarm, deactivate tow-away
protection manually if your vehicle:
R
is being transported
R is being loaded onto a ferry or car trans-
porter, for example
R is parked on a movable surface, e.g. in a
split-level garage Interior motion sensor
When the interior motion sensor is primed, a
visual and audible alarm is triggered if move-
ment is detected in the vehicle interior. This
occurs if someone reaches into the vehicle
interior, for example.
To activate:
X Make sure that:
R
the side windows are closed.
R the panorama sliding sunroof is closed.
This will prevent false alarms.
X Lock the vehicle with the key.
The interior motion sensor is primed after
approximately 30 seconds.
To deactivate:
X Unlock the vehicle with the key.
The interior motion sensor is switched off
automatically. Anti-theft systems
69Safety Z

Deactivating:
X
Remove the key from the ignition lock.
X Press button :.
Indicato rlamp ;flashes briefly.
X Loc kthe vehicle with the key.
The interior motion sensor is deactivated.
The interior motion sensor remains deactiva-
ted until:
R the vehicle is unlocked again.
R a door is opened and closed again.
R the vehicle is locked again.
To prevent a false alarm, deactivate the inte-
rior motion sensor if you lock your vehicle
and:
R people or animals remain in the vehicle.
R the side windows remain open.
R the panorama sliding sunroof remains
open.
i UK only: your vehicle is equipped with a
double lock function. The doors cannot be
opened from the inside if the vehicle has
been locked with the key (Y page 76).
Deactivate the interior motion sensor
before you lock the vehicle with the key.
The doors can then be opened from the
inside after the vehicle has been locked
from the outside with the key. Observe the
"Important safety notes" (Y page 76).70
Anti-theft systemsSafety

Useful information
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 deviations are possible. Please
note that your vehicle may not be equipped
with all features described. This also
applies to safety-relevan tsystems and
functions.
i Please read the information on qualified
specialist workshops (Y page 22).Key
Important safety notes
G
WARNING
If children are lef tunsupervised in the vehicle,
they could:
R open a door from inside the vehicle at any
time, eve nifithas been locked
R start the vehicle using akey which has been
left in the vehicle
R release the parking brake
They could thereby endanger themselves and
others. Never leave children unsupervised in
the vehicle. Always take the key with you
when leaving the vehicle, even if you are only
leaving it for a short time. G
WARNING
Do not attach any heavy or large key rings to
the key that is inserted in the ignition .Ifakey
ring is too heavy or too large, the weight acting
on the key could cause it to tur ninthe ignition
lock or catch on the steering wheel. This could
cause the engine to be switched off suddenly.
You could lose control of the vehicle and
cause an accident.
Do not use the key in the vicinity of strong
magnetic fields. Otherwise, the remote con-
trol function could be affected. Do not keep the key together with:
R
electronic devices, e.g. a mobile phone or
another key
R metallic objects, e.g. coins or metal foil Key functions
:
& To lock the vehicle
; % To unlock the vehicle
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.
The key centrally locks/unlocks:
R the doors
R the tailgate
R the fuel filler flap
When unlocking, the turn signals flash once.
When locking, they flash three times.
When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer (Y page 202).
You can also set an audible signal to confirm
that the vehicle has been locked. The audible
signal can be activated and deactivated using
the on-board computer (Y page 203).72
KeyOpening and closing

Changing the settings of the locking
system
X To change the setting: press and hold
down the %and& buttons simulta-
neously for approximately six seconds until
the battery check lamp flashes twice
(Y page 74).
i If the setting of the locking system is
changed within the signal range of the vehi-
cle, pressing the &or% buttonlocks
or unlocks the vehicle.
The key now functions as follows:
X To unlock the driver's door: press the
% button once.
X To unlock centrally: press the%but-
ton twice.
X To lock centrally: press the&button.
You can change the setting of the locking
system in such a way that only the driver's
door and the fuel filler flap are unlocked. This
is useful if you frequently travel on your own. Restoring factory settings
X Press the %and& buttons simulta-
neously for approximately six seconds until
the battery check lamp flashes twice. Emergency key element
General notes If the vehicle can no longer be unlocked with
the key, use the emergency key element.
If you use the emergenc ykey element to
unlock and open the driver's door, the anti-
thef talarm system will be triggered
(Y page 68).
There are several ways to tur noff the alarm:
X Press the %or& button on the key.
or
X Insert the key into the ignition lock. If you unlock the vehicle using the emergency
key element, the fuel filler flap will not be
unlocked automatically.
X
To unlock the fuel filler flap: insert the
key into the ignition lock.
Removing the emergency key element X
Push release catch :in the direction of
the arrow and at the same time, remove
emergency key element ;from the key. Battery of the key
Important safety notes G
WARNING
Batteries are toxic and contain caustic sub-
stances. For this reason, keep batteries out of
the reach of children.
If a battery has been swallowed, visi tadoctor
immediately. H
Environmental note Batteries contain pollutants.
It is illegal to dispose of them
with the household rubbish.
They must be collected sep-
arately and disposed of in an
environmentally responsible
recycling system.
Dispose of batteries in an
environmentally responsible
manner. Take discharged
batteries to a qualified spe- Key
73Opening and closing
Z

Problems with the key
Problem Possible causes/consequences and
M Solutions
You cannot 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's door
handle from close range and press the %/& button.
If this does not work:
X Check the key battery and replace it if necessary (Y page 74).
X Lock (Y page 77) or unlock (Y page 78) the vehicle using
the emergency key element. The key is faulty.
X
Lock (Y page 77) or unlock (Y page 78) the vehicle using
the emergency key element.
X Have the key checked at a qualified specialist workshop. You have lost a key. X
Have the key deactivated at a qualified 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. The engine cannot 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 does not work:
X Check the starter battery and charge it if necessary
(Y page 280).
or
X Jump-start the vehicle (Y page 283).
or
X Consult a qualified specialist workshop. The engine cannot be
started using the key. The steering lock is mechanically blocked.
X
Remove the key and reinsert it into the ignition lock. While doing
this, turn the steering wheel in both directions. Key
75Opening and closing Z

Doors
Important safety notes
G
WARNING
Only for the United Kingdom: if the vehicle
has bee nlocked with the key, the double lock
function is activated 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 in need of special assistance if
the vehicle has been locked with the key. As
a result, they may not be able to free them-
selves in the event of an emergency. As a
result, they could be seriously or even fatally
injured by prolonged exposure to extremely
high or low temperatures, for example. In this
case, rescuing people from outside the vehi-
cle is difficult.
Deactivate the interior motion sensor before
you lock the vehicle with the key. The doors
can then be opened from the inside after the
vehicle has been locked from the outside with
the key. G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open a door from inside the vehicle at any
time, even if it has been locked
R start the vehicle using akey which has been
left in the vehicle
R release the parking brake
They could thereby endanger themselves and
others. Never leave children unsupervised in
the vehicle. Always take the key with you
when leaving the vehicle, even if you are only
leaving it for a short time. Unlocking and opening the doors
from the inside
X
Pull door handle ;.
If the door is locked, locking knob :pops
up. The door is unlocked and can be
opened.
For all countries except the United King-
dom: you can open a door from inside the
vehicle even if it has been locked.
Only for the United Kingdom: if the vehicle
has been locked with the key, the double lock
function is activated as standard. It is then
not possible to open the doors from inside the
vehicle. Deactivate the interior motion sensor
(Y page 69) before you lock the vehicle with
the key. The doors can then be opened from
the inside after the vehicle has been locked
from the outside with the key.
If locked rear doors are not secured by the
child-proof locks (Y page 61), they can also
be opened from inside the vehicle. 76
DoorsOpening and closing

Centrally locking and unlocking the
vehicle from the inside
X
To unlock: press button :.
X To lock: press button ;.
If all the doors and th etailgate are closed,
the vehicle locks.
You can centrally lock or unlock the vehicle
from the inside. This can be useful if you wish
to loc kthe vehicle before pulling away, for
example.
The fuel filler flap is not locked or unlocked
when you press the central locking button or
the central unlocking button.
i You cannot unlock the vehicle centrally
from the inside if the vehicle has been
locked with the key.
i You can lock the vehicle centrally if the
front-passenger door is closed. Automatic locking feature
X
To deactivate: press and hold button :
for about five seconds until a tone sounds.
X To activate: press and hold button ;for
about five seconds until a tone sounds.
The vehicle is locked automatically when the
ignition is switched on and the wheels are
turning. You could therefore lock yourself out.
You could therefore be locked out when:
R the vehicle is being pushed.
R the vehicle is being towed.
R the vehicle is being tested on a dynamom-
eter.
i If you press one of the two buttons and
do not hear a tone, the relevant setting has
already been selected.
You can also switch the automatic locking
function on and off using the on-board com-
puter (Y page 203). Unlocking the driver's door (emer-
gency key element)
If the vehicle can no longer be unlocked with
the key, use the emergency key element.
If you use the emergency key element to
unlock and open the driver's door, the anti-
theft alarm system will be triggered
(Y page 68).
X Take the emergency key element out of the
key (Y page 73).
X Insert the emergency key element into the
lock of the driver's door as far as it will go. Doors
77Opening and closing Z

X
Turn the emergency key element anti-
clockwise to position 1.
The door is unlocked.
i On right-hand-drive vehicles, turn the
emergency key element clockwise.
X Turn the emergency key element back and
remove it.
X Insert the emergency key element into the
key. Locking the vehicle
If the vehicle can no longer be locked with the
key, use the emergency key element.
X Open the driver's door.
X Close the front-passenger door, the rear
doors and the tailgate.
X Press the locking button (Y page 77).
X Check whether the locking knobs on the
front-passenger door and the rear doors
are still visible. Press down the locking
knobs by hand, if necessary.
X Close the driver's door.
X Take the emergency key element out of the
key (Y page 73).
X Insert the emergency key element into the
lock of the driver's door as far as it will go. X
Turn the emergency key element clockwise
as far as it will go to position 1.
i On right-hand-drive vehicles, turn the
emergency key element anti-clockwise.
X Turn the emergency key element back and
remove it.
X Make sure that the doors and the tailgate
are locked.
X Insert the emergency key element into the
key.
i If you lock the vehicle as described above,
the fuel filler flap is not locked. The anti-
theft alarm system is not primed. Luggage compartment
Important safety notes
! The tailgate swings upwards and to the
rear when opened. Therefore, make sure
that there is sufficient clearance above and
behind the tailgate.
Do not leave the key in the luggage compart-
ment.Y ou could otherwise lock yourself out.
i You will find details of the tailgate opening
dimensions in the Technical data section
(Y page 318).
You can:
R open and close the tailgate manually from
outside
R unlock the tailgate from inside with the
emergency key element 78
Luggage compartmentOpening and closing