2012 MERCEDES-BENZ B-CLASS height

Power washer ................................
272
Rear view camera .......................... 275
Roof lining ...................................... 277
Seat belt
........................................ 277
Seat cover ..................................... 276
Sensors ......................................... 275
Steering wheel ............................... 276
Trim pieces .................................... 276
Washing by hand ........................... 272
Wheels ........................................... 273
Windows ........................................ 274
Wiper blades .................................. 274
Wooden trim .................................. 276
Cargo compartment cover ...............244
Cargo compartment enlargement ...240
Important safety notes .................. 240
Notes on use ................................. 242
Cargo compartment floor
Height adjustment .........................246
Important safety notes .................. 245
Opening/closing ............................ 246
Stowage well (under) ..................... 245
Cargo net
Attaching ....................................... 245
Important safety information ......... 245
Cargo tie down rings .........................243
Car wash (care) ................................. 271
Center console Lower section .................................. 33
Upper section .................................. 32
Central locking
Automatic locking (on-board
computer) ...................................... 198
Locking/unlocking (SmartKey) ........ 68
Changing bulbs
Brake lamps ................................... 109
Cornering light function .................108
High-beam headlamps ...................107
Important safety notes .................. 104
License plate lighting .....................111
Low-beam headlamps .................... 107
Overview of bulb types ..................105
Parking lamps ................................ 108
Rear fog lamp ................................ 109
Removing/replacing the cover
(front wheel arch) .......................... 106
Reversing lamps ............................ 109
Standing lamps (front) ...................108Tail lamps
...................................... 109
Turn signals (front) ......................... 108
Turn signals (rear)
..........................109
Child-proof locks
Important safety notes .................... 57
Rear doors ....................................... 58
Children
In the vehicle ................................... 50
Restraint systems ............................ 50
Child seat
Automatic recognition ..................... 53
LATCH-type (ISOFIX) child seat
anchors ............................................ 54
On the front-passenger seat ............52
Problem (malfunction) .....................57
Top Tether ....................................... 55
Cigarette lighter ................................ 250
Climate control Automatic climate control ............. 119
Automatic climate control (dual-
zone) .............................................. 121
Controlling automatically ...............125
Cooling with air dehumidification ..123
Defrosting the windows ................. 127
Defrosting the windshield .............. 127
Important safety notes .................. 118
Indicator lamp ................................ 125
Maximum cooling .......................... 127
Notes on using automatic climate
control ................................... 120, 122
Overview of systems ...................... 118
Problems with cooling with air
dehumidification ............................ 125
Problem with the rear window
defroster ........................................ 129
Refrigerant ..................................... 334
Refrigerant filling capacity .............335
Setting the air distribution .............126
Setting the airflow ......................... 126
Setting the air vents ......................130
Setting the temperature ................ 125
Switching air-recirculation mode
on/off ............................................ 129
Switching on/off ........................... 123
Switching residual heat on/off ...... 1296
Index
ProCarManuals.com

(vehicles without the EASY-
VARIO-PLUS system)
.....................240
Folding the backrest (rear
compartment) forwards/back
(vehicles with the EASY-VARIO-
PLUS system) ................................ 241
Seat belts
Adjusting the height ......................... 48
Belt force limiters ............................ 49
center rear-compartment seat
.........48
Cleaning ......................................... 277
Correct usage .................................. 46
Emergency Tensioning Devices ........ 49
Fastening ......................................... 47
Important safety guidelines .............45
Releasing ......................................... 48
Safety guidelines ............................. 40
Warning lamp ................................. 224
Warning lamp (function) ................... 49
Seats
Adjusting (electrically) .....................88
Adjusting (manually) ........................ 88
Adjusting the 4-way lumbar
support ............................................ 90
Adjusting the head restraint ............ 89
Cleaning the cover ......................... 276
Correct driver's seat position ........... 86
Important safety notes .................... 87
Seat heating problem ...................... 91
Storing settings (memory function) .. 95
Switching seat heating on/off ......... 91
Sensors (cleaning instructions) .......275
Service menu (on-board computer) . 196
Service products Brake fluid ..................................... 332
Coolant (engine) ............................ 333
Engine oil ....................................... 332
Fuel ................................................ 330
Important safety notes .................. 329
Refrigerant (air-conditioning
system) .......................................... 334
Washer fluid ................................... 334
Service work
see ASSYST PLUS
Settings
Factory (on-board computer) ......... 199
On-board computer ....................... 196
Setting the air distribution ...............126Setting the airflow
............................ 126
Side impact air bag ............................. 44
Side marker lamp (display
message) ............................................ 211
Side windows Cleaning ......................................... 274
Convenience closing feature ............ 78
Convenience opening feature
..........78
Important safety information ........... 77
Opening/closing .............................. 77
Problem (malfunction) .....................79
Resetting ......................................... 79
Sliding sunroof
see Panorama roof with power
tilt/sliding panel
SmartKey
Changing the battery ....................... 70
Changing the programming ............. 69
Checking the battery ....................... 70
Convenience closing feature ............ 78
Convenience opening feature .......... 78
Display message ............................ 223
Door central locking/unlocking ....... 68
Important safety notes .................... 68
Loss ................................................. 72
Mechanical key ................................ 69
Positions (ignition lock) ................. 135
Problem (malfunction) .....................72
Starting the engine ........................ 135
SmartKey positions (ignition lock) ..135
Snow chains ...................................... 301
Sockets Center console .............................. 251
Luggage compartment ................... 251
Points to observe before use ......... 250
Rear compartment ......................... 251
Specialist workshop ............................ 24
Speed, controlling see Cruise control
Speedometer
Activating/deactivating the
additional speedometer .................196
Digital ............................................ 190
In the Instrument cluster ................. 29
Segments ...................................... 187
Selecting the unit of measurement 196
see Instrument cluster Index
15
ProCarManuals.com

touch the neck. Never pass the shoulder
portion of
the
seat belt under your arm. For
this purpose, you can adjust the height of
the seat belt outlet.
R Position the lap belt as low as possible on
your hips and not across the abdomen. If
the lap belt is positioned across your
abdomen, it could cause serious injuries in
a crash.
R Never wear seat belts over rigid or
breakable objects in or on your clothing,
such as eyeglasses, pens, keys etc., as
these might cause injuries.
R Make sure the seat belt is always fitted
snugly. Take special care of this when
wearing loose clothing.
R Never use a seat belt for more than one
person at a time. Do not fasten a seat belt
around a person and another person or
other objects at the same time.
R Seat belts should not be worn twisted. In a
crash, you would not have the full width of
the seat belt to distribute impact forces.
The twisted seat belt against your body
could cause injuries.
R Pregnant women should also always use a
lap-shoulder belt. The lap belt portion
should be positioned as low as possible on
the hips to avoid any possible pressure on
the abdomen.
R Place the seat backrest in a position that is
as upright as possible.
R Check your seat belt during travel to make
sure it is properly positioned.
R Never place your feet on the instrument
panel, dashboard, or on the seat. Always
keep both feet on the floor in front of the
seat.
R When using a seat belt to secure infant
restraints, toddler restraints, or children in
booster seats, always follow the child seat
manufacturer's instructions. G
WARNING
Do not pass seat belts over sharp edges. They
could tear.
Do not allow

the seat belt to get caught in the
door or in the seat adjustment mechanism.
This could damage the seat belt.
Never attempt to make modifications to seat
belts. This could impair the effectiveness of
the seat belts.
Fastening seat belts G
WARNING
According to accident statistics, children are
safer when properly restrained on the rear
seats than on

the front-passenger seat. Thus,
we strongly recommend that children be
placed in the rear seat whenever possible.
Regardless of seating position, children 12
years old and under must be seated and
properly secured in an appropriately sized
child restraint system or booster seat
recommended for the size and weight of the
child. For additional information, see the
"Children in the vehicle" section.
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. Occupant safety
47
Safety Z
ProCarManuals.com

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

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
ProCarManuals.com

If the front-passenger seat of your vehicle
does not
have
an air bag deactivation system,
this is indicated by a special sticker. The
sticker is affixed to the side of the dashboard
on the front-passenger side. The sticker is
visible when you open the front-passenger
door.
Vehicles without an air bag deactivation
system on the front-passenger seat: if you
turn the SmartKey to position 2 in the ignition
lock, the 45 indicator lamp lights up
briefly but has no function. It does not
indicate that there is an air bag deactivation
system on the front-passenger seat. The sensor system for the air bag deactivation
system detects
whether

a special Mercedes-
Benz child seat with a transponder for the air
bag deactivation system has been installed.
In this case, 45 indicator lamp :
lights up. The front-passenger front air bag is
deactivated: i
If the front-passenger front air bag is
disabled by the air bag deactivation
system, the following remain enabled on
the front-passenger side:
R the side impact air bag
R the window curtain air bag
R the Emergency Tensioning Device
LATCH-type (ISOFIX) child

seat anchors
in the rear G
WARNING
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 normal shoulder/lap belt fit properly
without a booster.
Install the child seat according to
manufacturer's instructions.
The child seat must be firmly attached to both
anchors.
An incorrectly installed child restraint system
could come loose during an accident and
seriously or even fatally injure the child.
Damaged or impact damaged child seats or
child seat mountings must be replaced.
! When installing the LATCH-type (ISOFIX)
child restraint system, make sure that the
seat belt for the center seat does not get
trapped. Otherwise, the seat belt could be
damaged. 54
Children in the vehicle
Safety
ProCarManuals.com

Seats
Important safety notes
G
WARNING
Children could become trapped if they adjust
the seats, particularly when unattended.
There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you
and lock the vehicle. Never
leave children unsupervised in the vehicle. G
WARNING
You could lose control of your vehicle if you
do the following while driving:
R adjust the driver's seat, head restraint,
steering wheel or mirrors
R fasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint,
steering wheel and mirror and fasten your
seat belt before starting the engine. G
WARNING
If you adjust the seat height carelessly, you or
other vehicle occupants

could be trapped and
thereby injured. Children in particular could
accidentally press the electrical seat
adjustment buttons and become trapped.
There is a risk of injury.
While moving the seats, make sure that your
hands or other body parts do not get under
the lever assembly of the seat adjustment
system. G
WARNING
When you adjust a seat, you or other vehicle
occupants could become

trapped, e.g. on the
seat guide rail. There is a risk of injury.
Make sure when adjusting a seat that no one
has any body parts in the sweep of the seat. G
WARNING
The seat belt does not offer the intended level
of protection if the backrest is not in the
upright position. When

braking or in the event of an accident, you could slide underneath the
seat belt and sustain abdomen or neck
injuries, for
example.

This poses an increased
risk of injury or even fatal injury.
Adjust the seat properly before beginning
your journey. Always make sure that the seat
is in the upright position. G
WARNING
If head restraints are not installed and
adjusted correctly, they cannot provide
protection as intended.

There is an increased
risk of injury in the head and neck area, e.g.
in the event of an accident or when braking.
Always drive with the head restraints
installed. Before driving off, make sure for
every vehicle occupant that the center of the
head restraint supports the back of the head
at about eye level. G
WARNING
According to accident statistics, children are
safer when properly restrained on the rear
seats than on

the front-passenger seat. Thus,
we strongly recommend that children be
placed in the rear seat whenever possible.
Regardless of seating position, children 12
years old and under must be seated and
properly secured in an appropriately sized
child restraint system or booster seat
recommended for the size and weight of the
child. For additional information, see the
"Children in the vehicle" section.
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.
! To avoid damage to the seats and the seat
heating, observe the following information:
R keep liquids from spilling on the seats. If
liquid is spilled on the seats, dry them as
soon as possible.
R if the seat covers are damp or wet, do not
switch on the seat heating. The seat Seats
87
Seats, steering wheel and mirrors Z
ProCarManuals.com

heating should also not be used to dry
the seats.
R clean the seat covers as recommended;
see the "Interior care" section.
R do not transport heavy loads on the
seats. Do not
place sharp objects on the
seat cushions, e.g. knives, nails or tools.
The seats should only be occupied by
passengers, if possible.
R when the seat heating is in operation, do
not cover the seats with insulating
materials, e.g. blankets, coats, bags,
seat covers, child seats or booster seats.
! Make sure that there are no objects in the
footwell or behind the seats when resetting
the seats. There is a risk that the seats
and/or the objects could be damaged.
i The head restraints in the front and rear
seats can be removed. 1
For more information, contact a qualified
specialist workshop.
i Further related subjects:
R Luggage compartment enlargement
(folding down the rear seats)
(Y page 240) Adjusting the seats manually Seat fore-and-aft adjustment
X
Lift handle : and slide the seat forwards
or backwards.
X Release lever : again.
Make sure
that

you hear the seat engage in
position.
Backrest angle X
Relieve the pressure on the backrest.
X Turn handwheel ? forwards or
backwards.
Seat height X
Pull handle = upwards or push it down
repeatedly until the seat has reached the
desired height.
Seat cushion angle Adjust the angle so that your thighs are lightly
supported.
X
Turn handwheel ; forwards or
backwards. Adjusting the seats electrically
:
Head restraint height 2
; Seat cushion angle
= Seat height
? Seat fore-and-aft adjustment
A Backrest angle
1 Not on vehicles with sports seats.
2 Not available on vehicles with sports seats.88
Seats
Seats, steering wheel and mirrors
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