2012 MERCEDES-BENZ B-CLASS lock

Wear indicator (definition)
.............318
Wheel rim (definition) ....................316
see Flat tire

Top Tether ............................................ 55
Towing Important safety guidelines ...........291
Installing the towing eye ................ 292
Removing the towing eye ...............292
Towing away
With both axles on the ground ....... 293
With front axle raised ..................... 293
Tow-starting
Emergency engine starting ............ 294
Important safety notes .................. 291
Installing the towing eye ................ 292
Removing the towing eye ...............292
Traction control ................................... 62
Transmission see Automatic transmission
Transmission position display .........141
Transporting the vehicle .................. 293
Trim pieces (cleaning instructions) . 276
Trip computer (on-board computer) 189
Trip odometer Calling up ....................................... 189
Resetting (on-board computer) ...... 190
Trunk
see Tailgate
Turn signals
Changing bulbs (front) ................... 108
Changing bulbs (rear) .................... 109
Display message ............................ 209
Switching on/off ........................... 100
Type identification plate
see Vehicle identification plate U
Unlocking Emergency unlocking .......................75
From inside the vehicle (central
unlocking button) ............................. 74 V
Vanity mirror (in the sun visor) ........ 249
Vehicle Correct use ...................................... 24
Data acquisition ............................... 25
Equipment
....................................... 21
Individual settings ..........................196
Limited Warranty ............................. 25
Loading .......................................... 306
Locking (in an emergency) ............... 75
Locking (SmartKey) .......................... 68
Lowering ........................................ 322
Maintenance .................................... 22
Parking for a long period ................ 152
Pulling away ................................... 136
Raising ........................................... 320
Reporting problems .........................24
Securing from rolling away ............320
Towing away .................................. 291
Tow-starting ................................... 291
Transporting .................................. 293
Unlocking (in an emergency) ........... 75
Unlocking (SmartKey) ......................68
Vehicle data ................................... 335
Vehicle data ....................................... 335
Vehicle dimensions ...........................335
Vehicle emergency locking ................75
Vehicle identification number see VIN
Vehicle identification plate ..............328
Vehicle tool kit .................................. 280
Video (DVD) ........................................ 193
VIN ...................................................... 328 W
Warning and indicator lamps ABS ................................................ 225
Brakes

........................................... 225
Check Engine ................................. 231
Coolant .......................................... 231
Distance warning ........................... 233
DISTRONIC PLUS ........................... 233
ESP ®
.............................................. 227
ESP ®
OFF ....................................... 228
Fuel tank ........................................ 231
Overview .......................................... 3018
Index
ProCarManuals.com

Dashboard
Function Page
:
Steering wheel paddle
shifters
144
;
Combination switch 100
=
Instrument cluster 29
?
Horn
A
DIRECT SELECT lever 140
B
PARKTRONIC warning
display
169
C
Overhead control panel 34
D
Climate control systems
118 Function Page
E
Ignition lock 135
F
Adjusting the steering
wheel
91
G
Cruise control lever 158
H
Electric parking brake 150
I
Light switch 98
J
Diagnostics connection 24
K
Opening the hood 26628
DashboardAt a glance
ProCarManuals.com

Door control panel
Function Page
:
Opens the door 73
;
%& Unlocks/locks
the vehicle
74
=
r45= Saves
the seat
and exterior mirror
settings 95
?
Adjusts the seats
electrically
88
A
7Zö\
Adjusts and folds the
exterior mirrors in/out
electrically
92 Function Page
B
W Opens/closes the
side windows
77
C
n Activates/
deactivates the override
feature for the side
windows in the rear
compartment
58Door control panel
35
At a glance
ProCarManuals.com

Useful information ..............................
38
Panic alarm .......................................... 38
Occupant safety .................................. 38
Children in the vehicle ........................50
Driving safety systems ....................... 58
Theft deterrent locking system ......... 64 37Safety
ProCarManuals.com

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note
that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: ( Y page 24).Panic alarm
X
To activate: press ! button : for at
least one second.
An alarm sounds and the exterior lighting
flashes.
X To deactivate: press ! button :
again.
or
X Insert the SmartKey into the ignition lock. Occupant safety
Important safety notes
G
WARNING
Modifications to or work improperly
conducted on restraint system components
or their wiring, as well as tampering with interconnected electronic systems, can lead
to the
restraint
systems no longer functioning
as intended.
Air bags or Emergency Tensioning Devices
(ETDs), for example, could deploy
inadvertently or fail to deploy in accidents
although the deceleration threshold for air
bag deployment is exceeded. Therefore,
never modify the restraint systems. Do not
tamper with electronic components or their
software.
In this section, you will learn the most
important facts about the restraint system
components of the vehicle.
The restraint system consists of:
R Seat belts
R Child restraint systems
R LATCH-type (ISOFIX) child seat securing
system
Additional protection is provided by:
R SRS (Supplemental Restraint System)
R Air bag system components with the
PASSENGER AIRBAG OFF indicator lamp
The different air bag systems work
independently of each other. The protective
functions of the system work in conjunction
with each other. Not all air bags are always
deployed in an accident.
i For information on infants and children
traveling with you in the vehicle restraint
systems for infants and children, see
"Children in the vehicle" ( Y page 50). SRS (Supplemental Restraint System)
Introduction Supplemental Restraint System (SRS) with:
R
The 6 SRS warning lamp
R Air bags
R Air bag control unit (with crash sensors)38
Occupant safety
Safety
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X
Adjust the seat and move the backrest to
an almost vertical position ( Y page 86).
X Pull the seat belt smoothly through belt
sash guide :.
X Without twisting it, guide the shoulder
section of the seat belt across the middle
of your shoulder
and the lap section across
your pelvis.
X Engage belt tongue ; in buckle =.
X If necessary, adjust the seat belt to the
appropriate height ( Y page 48).
X If necessary, pull upwards on the shoulder
section of the seat belt to tighten the belt
across your body.
Information on releasing the seat belt with
release button

?(Y page 48).
Belt height adjustment You can adjust the seat belt height on the
front seats. Adjust the belt to a height that
allows the upper part of the seat belt to be
routed across the center of your shoulder.
X
To raise: slide the belt sash guide upwards.
The belt sash guide engages in various
positions.
X To lower: press and hold belt sash guide
release :

.
X Slide the belt sash guide downwards.
X Release belt sash guide release : and
make sure that the belt sash guide has
engaged. Using the seat belt for the center rear-
compartment seat If the left-hand rear seat backrest is folded
down and
back

up again, the rear center seat
belt may lock. The seat belt can then not be
pulled out.
X To release the rear center seat belt: pull
the seat belt out approximately 1 in
(25 mm) at the belt outlet on the backrest
and then release it again.
The seat belt is retracted and released.
Releasing seat belts !
Make sure
that

the seat belt is fully rolled
up. Otherwise, the seat belt or belt tongue
will be trapped in the door or in the seat
mechanism. This could damage the door,
the door trim panel and the seat belt.
Damaged seat belts can no longer fulfill
their protective function and must be
replaced. Visit a qualified specialist
workshop. X
Press release button ?
on belt

buckle =.
X Guide belt tongue ; back to belt sash
guide :.48
Occupant safety
Safety
ProCarManuals.com

Belt warning for the driver and front
passenger
Regardless of whether the driver's and front-
passenger seat belts have already been
fastened, the 7 seat belt warning lamp
lights up
for
six seconds each time the engine
is started. It then goes out if the driver and
the front passenger have already fastened
their seat belts.
If the driver's seat belt is not fastened when
the engine is started, an additional warning
tone will sound. This warning tone stops after
a maximum of six seconds or once the
driver's seat belt is fastened.
If after six seconds the driver or front
passenger have not fastened their seat belts
and the doors are closed, the 7 seat belt
warning lamp lights up:
R until the driver's or front passenger's seat
belt is fastened
R if a vehicle speed of 15 mph (25 km/h) is
exceeded, a warning tone also sounds with
increasing intensity for a maximum of
60 seconds or until the driver or front-
passenger seat belt has been fastened.
If the driver/front passenger unfasten their
seat belt while the vehicle is in motion, the
7 seat belt warning lamp lights up and a
warning tone sounds again.
The warning tone ceases even if the driver or
front-passenger seat belt has still not been
fastened after 60 seconds. The 7 seat belt
warning lamp stops flashing but remains
illuminated.
After the vehicle comes to a standstill, the
warning tone is reactivated and the 7 seat
belt warning lamp flashes again if the vehicle
speed again exceeds 15 mph (25 km/h).
The 7 seat belt warning lamp only goes
out if:
R both the driver and the front passenger
have fastened their seat belts.
or
R the vehicle is stationary and a door is open. i
For more information on the 7 seat
belt warning lamp, see "Warning and
indicator lamps in the instrument cluster,
seat belts" ( Y page 224).
Emergency Tensioning Devices, seat
belt force limiters G
WARNING
Pyrotechnic ETDs that were activated must be
replaced.
For your safety, when disposing of the
pyrotechnic ETDs always follow our safety
instructions. These are available at any
authorized Mercedes-Benz Center.
! If the front-passenger seat is not
occupied, do not engage the seat belt
tongue in the buckle on the front-
passenger seat. Otherwise,

the Emergency
Tensioning Device could be triggered in the
event of an accident.
The front seat belts and the outer seat belts
in the rear are equipped with Emergency
Tensioning Devices and seat belt force
limiters.
The ETDs tighten the seat belts in an accident,
pulling them close against the body.
The ETDs do not correct incorrect seat
positions or incorrectly fastened seat belts.
The ETDs do not pull vehicle occupants back
towards the backrest.
The ETDs can only be activated when:
R the ignition is switched on.
R the restraint systems are operational; see
"SRS warning lamp" 6(Y page 39).
R the belt tongue is engaged in the buckle on
each of the front seat belts.
The ETDs on the outside seats in the rear
compartment are triggered independently of
the lock status of the seat belts.
The ETDs are triggered depending on the type
and severity of an accident:
R if, in the event of a head-on or rear-end
collision, the vehicle decelerates or Occupant safety
49
Safety Z
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passenger front air bag is deactivated.
Should the 4 5 indicator lamp not
illuminate or go out while the restraint is
installed, please check installation.
Periodically check
the 4
5 indicator
lamp while driving to make sure the 4
5 indicator lamp is illuminated. If the
4 5 indicator lamp goes out or
remains out, do not transport a child on the
front passenger seat until the system has
been repaired.
A child in a rear-facing child restraint on the
front passenger seat will be seriously
injured or even killed if the front passenger
front air bag inflates.
R If you have to place a child in a forward-
facing child restraint on the front passenger
seat, move the seat as far back as possible,
use the proper child restraint
recommended for the age, size and weight
of the child, and secure child restraint with
the vehicle's seat belt according to the
child seat manufacturer's instructions. G
WARNING
Infants and small children should never share
a seat belt

with another occupant. In the event
of an accident, they could be crushed
between the occupant and seat belt.
A child's risk of serious or fatal injuries is
significantly increased if the child restraints
are not properly secured in the vehicle and/
or the child is not properly secured in the child
restraint.
Children that are too large for a child restraint
must travel in seats using normal seat belts.
Position the shoulder belt across the chest
and shoulder, not the face or neck. A booster
seat may be necessary to achieve proper seat
belt positioning for children over 41 lbs
(18 kg) until they reach a height where a lap/
shoulder belt fits properly without a booster
seat.
When the child restraint is not in use, remove
it from the vehicle or secure it with the seat
belt to prevent the child restraint from becoming a projectile in the event of an
accident.
G
WARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unattended in the
vehicle, even if they are secured in a child
restraint system, or with access to an
unlocked vehicle. A child's unsupervised
access to a

vehicle could result in an accident
and/or serious personal injury. The children
could:
R injure themselves on parts of the vehicle
R be seriously or fatally injured through
excessive exposure to extreme heat or cold
R injure themselves or cause an accident with
vehicle equipment that can be operated
even if the SmartKey is removed from the
ignition lock or removed from the vehicle,
such as seat adjustment, steering wheel
adjustment, or the memory function
If children open a door, they could injure other
persons or get out of the vehicle and injure
themselves or be injured by following traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and the child could be burned on these
parts. G
WARNING
Do not carry heavy or hard objects in the
passenger compartment or

trunk unless they
are firmly secured in place.
Unsecured or improperly positioned cargo
increases a child's risk of injury in the event
of
R strong braking maneuvers
R sudden changes of direction
R an accident Children in the vehicle
51
Safety Z
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