steering wheel MERCEDES-BENZ B-CLASS 2012 Owners Manual

Index
....................................................... 4Introduction .........................................
20 At a glance
........................................... 27 Safety ...................................................
37 Opening and closing
...........................67 Seats, steering wheel and mirrors ....
85 Lights and windshield wipers
............97 Climate control
................................. 117 Driving and parking ..........................
133 On-board computer and displays
....185 Stowage and features ......................
235 Maintenance and care
......................265 Breakdown assistance
.....................279 Wheels and tires ...............................
297 Technical data ...................................
327 Contents
3ProCarManuals.com

Automatic transmission
Automatic drive program ............... 144
Changing gear ............................... 143
DIRECT SELECT lever .....................140
Display message
............................ 220
Drive program display ....................141
Driving tips .................................... 143
Emergency running mode ..............147
Engaging drive position .................. 142
Engaging neutral ............................ 141
Engaging reverse gear ................... 141
Engaging the park position ............ 141
Holding the vehicle stationary on
uphill gradients .............................. 143
Kickdown ....................................... 143
Manual drive program ....................144
Overview ........................................ 140
Problem (malfunction) ...................147
Program selector button ................143
Pulling away ................................... 136
Starting the engine ........................ 135
Steering wheel paddle shifters ...... 144
Transmission position display ........ 141
Transmission positions .................. 142
Automatic transmission
emergency mode ............................... 147B
Backup lamp Changing bulbs .............................. 109
Display message ............................ 211
Bag hook

............................................ 243
BAS (Brake Assist System) ................. 59
Battery (SmartKey) Checking .......................................... 70
Important safety notes .................... 70
Replacing ......................................... 70
Battery (vehicle)
Charging ........................................ 288
Display message ............................ 213
Important safety notes .................. 285
Jump starting ................................. 289
Belt force limiter
Activation ......................................... 49
Function ........................................... 49
Blinds
see Roller sunblind Blind Spot Assist
Activating/deactivating .................195
Display message

............................ 216
Notes/function .............................. 181
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 207
Notes ............................................. 332
Brake lamps
Adaptive ........................................... 62
Changing bulbs .............................. 109
Display message ............................ 209
Brakes
ABS .................................................. 59
Adaptive Brake Assist ......................61
BAS .................................................. 59
Brake fluid (notes) .........................332
Display message ............................ 201
Driving tips .................................... 154
Important safety notes .................. 154
Maintenance .................................. 155
Parking brake ................................ 150
Warning lamp ................................. 225
Breakdown
see Flat tire
see Towing away/tow-starting
Bulbs
see Changing bulbs C
Calling up a malfunction see Display messages


Car
see Vehicle
Care
Carpets .......................................... 277
Car wash ........................................ 271
Display ........................................... 275
Exhaust pipe .................................. 275
Exterior lights ................................ 274
Gear or selector lever ....................276
Interior ........................................... 275
Matte finish ................................... 273
Notes ............................................. 271
Paint .............................................. 273
Plastic trim .................................... 276 Index
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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
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Switching the surround lighting
on/off (on-board computer)
..........198
Turn signals ................................... 100
see Changing bulbs

see Interior lighting
Light sensor (display message) .......211
Loading guidelines ............................236
Locking see Central locking
Locking (doors)
Automatic ........................................ 74
Emergency locking ........................... 75
From inside (central locking
button) ............................................. 74
Locking centrally
see Central locking
Locking verification signal (on-
board computer) ............................... 199
Low-beam headlamps Changing bulbs .............................. 107
Display message ............................ 209
Setting for driving abroad
(symmetrical) ................................... 98
Switching on/off .............................. 99
Lumbar support
Adjusting the 4-way lumbar
support ............................................ 90M
M+S tires ............................................ 300
Maintenance see ASSYST PLUS


Malfunction message
see Display messages
Matte finish (cleaning instructions) 273
mbrace Call priority .................................... 255
Display message ............................ 207
Downloading destinations
(COMAND) ..................................... 256
Downloading routes .......................259
Emergency call .............................. 253
Geo fencing ................................... 259
Important safety notes .................. 251
Locating a stolen vehicle ............... 258
MB info call button ........................ 255
Remote vehicle locking .................. 257Roadside Assistance button ..........
254
Search & Send ............................... 256
Self-test ......................................... 252
Speed alert .................................... 259
System

.......................................... 252
Triggering the vehicle alarm ........... 260
Vehicle remote malfunction
diagnosis ....................................... 258
Vehicle remote unlocking .............. 257
Mechanical key
Function/notes ................................ 69
Locking vehicle ................................ 75
Unlocking the driver's door ..............75
Memory card (audio) ......................... 192
Memory function ................................. 95
Message memory (on-board
computer) .......................................... 200
Messages see Display messages
Mirrors
see Exterior mirrors
see Rear-view mirror
see Vanity mirror (in the sun visor)
Mobile phone
Menu (on-board computer) ............ 193
Modifying the programming
(SmartKey) ........................................... 69
MOExtended tires .............................. 281
Mounting wheels Lowering the vehicle ......................322
Mounting a new wheel ................... 322
Preparing the vehicle .....................319
Raising the vehicle ......................... 320
Removing a wheel ..........................322
Securing the vehicle against
rolling away ................................... 320
MP3
Operation ....................................... 192
see separate operating instructions
Multifunction display
Function/notes ............................. 188
Permanent display ......................... 197
Multifunction steering wheel
Operating the on-board computer . 187
Overview .......................................... 3112
Index
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SRS (Supplemental Restraint
System)
Display message ............................ 207
Introduction
..................................... 38
Warning lamp ................................. 230
Warning lamp (function) ................... 39
Standing lamps
Changing bulbs .............................. 108
Display message ............................ 210
Switching on/off ........................... 100
Start/stop function
see ECO start/stop function
Starting (engine) ................................ 135
STEER CONTROL .................................. 64
Steering (display message) ..............222
Steering wheel Adjusting (manually) ........................ 91
Button overview ............................... 31
Buttons (on-board computer) ......... 187
Cleaning ......................................... 276
Important safety notes .................... 91
Paddle shifters ............................... 144
Steering wheel paddle shifters ........144
Stowage areas ................................... 237
Stowage compartments Armrest (front) ............................... 238
Armrest (under) ............................. 238
Center console .............................. 237
Cup holders ................................... 247
Eyeglasses compartment ............... 237
Glove box ....................................... 237
Important safety information ......... 237
Parcel net ...................................... 239
Under driver's seat/front-
passenger seat .............................. 238
Stowage space
Center console (rear) ..................... 238
Summer tires ..................................... 300
Sun visor ............................................ 249
Supplemental Restraint System see SRS (Supplemental Restraint
System)
Surround lighting (on-board
computer) .......................................... 198
Switching air-recirculation mode
on/off ................................................. 129
Switching off the alarm (ATA) ............65 T
Tachometer ........................................ 187
Tailgate Display message ............................ 222
Emergency unlocking .......................76
Important safety notes
....................75
Opening/closing (from outside) ....... 76
Opening dimensions ...................... 335
Tail lamps
Display message ............................ 210
see Lights
Tank content
Fuel gauge ....................................... 29
Technical data
Capacities ...................................... 329
Emergency spare wheel ................. 326
Information .................................... 328
Tires/wheels ................................. 323
Vehicle data ................................... 335
TELEAID
Call priority .................................... 255
Downloading destinations
(COMAND) ..................................... 256
Downloading routes .......................259
Emergency call .............................. 253
Geo fencing ................................... 259
Important safety notes .................. 251
Locating a stolen vehicle ............... 258
MB info call button ........................ 255
Remote vehicle locking .................. 257
Roadside Assistance button .......... 254
Search & Send ............................... 256
Self-test ......................................... 252
Speed alert .................................... 259
System .......................................... 252
Triggering the vehicle alarm ........... 260
Vehicle remote malfunction
diagnosis ....................................... 258
Vehicle remote unlocking .............. 257
Telephone
Accepting a call ............................. 193
Display message ............................ 222
Menu (on-board computer) ............ 193
Number from the phone book ........ 194
Redialing ........................................ 194
Rejecting/ending a call ................. 19416
Index
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Operating safety
Important safety notes
G
WARNING
If you do not have the prescribed service/
maintenance work or any required repairs
carried out, this
can result in malfunctions or
system failures. There is a risk of an accident.
Always have the prescribed service/
maintenance work as well as any required
repairs carried out at a qualified specialist
workshop. G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or

not at all. This could affect,
for example, the power steering and the brake
boosting effect. You will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving. G
WARNING
Modifications to electronic components, their
software as well as wiring can impair their
function and/or the function of other
networked components. In particular,
systems relevant to safety could also be
affected. As a result, these may no longer
function as intended and/or jeopardize the
operating safety of the vehicle. There is an
increased risk of an accident and injury.
Never tamper with the wiring as well as
electronic components or

their software. You
should have all work to electrical and
electronic equipment carried out at a qualified
specialist workshop.
There is a risk of damage to the vehicle if:
R the vehicle becomes stuck, e.g. on a high
curb or an unpaved road
R you drive too fast over an obstacle, e.g. a
curb or a hole in the road
R a heavy object strikes the undercarriage or
parts of the chassis. In situations like this, the body, the
undercarriage, chassis parts, wheels or tires
could be
damaged

without the damage being
visible. Components damaged in this way can
unexpectedly fail or, in the case of an
accident, no longer withstand the strain they
are designed to.
If the underbody paneling is damaged,
combustible materials such as leaves, grass
or twigs can gather between the underbody
and the underbody paneling. If these
materials come in contact with hot parts of
the exhaust system for an extended period,
they can catch fire.
Have the vehicle checked and repaired
immediately at a qualified specialist
workshop. If on continuing your journey you
notice that driving safety is impaired, pull over
and stop the vehicle immediately, paying
attention to road and traffic conditions. In
such cases, visit a qualified specialist
workshop. Declarations of conformity
Vehicle components which receive
and/or transmit radio waves USA: "The wireless devices of this vehicle
comply with Part 15 of the FCC Rules.
Operation is subject to the following two
conditions: 1) These devices may not cause
harmful interference, and 2) These devices
must accept any interference received,
including interference that may cause
undesired operation. Changes or
modifications not expressly approved by the
party responsible for compliance could void
the user’s authority to operate the
equipment."
Canada:
"The wireless

devices of this vehicle
comply with Industry Canada license-exempt
RSS standard(s). Operation is subject to the
following two conditions: (1) These devices
may not cause interference, and (2) These
devices must accept any interference, Introduction
23 Z
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Dashboard ...........................................
28
Instrument cluster ..............................29
Multifunction steering wheel .............31
Center console .................................... 32
Overhead control panel ......................34
Door control panel .............................. 35 27At a glance
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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
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Multifunction steering wheel
Function Page
:
Multifunction display 188
;
Audio/COMAND display;
see the separate operating
instructions
=
?
Switches on the Voice
Control System; see the
separate operating
instructions
?
~
Rejects or ends a call 193
Exits phone book/redial
memory
6
Makes or accepts a call
Switches to the redial
memory
WX
Adjusts the volume
8
Mute Function Page
A
=;
Selects a menu 187
9:
Selects a submenu or
scrolls through lists
187
a
Confirms your selection 187
Hides display messages 200
B
%
Back 187
Switches off the Voice
Control System; see the
separate operating
instructionsMultifunction steering wheel
31At a glance
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R
the deformation characteristics of the
vehicle
R the characteristics of
the object with which
the vehicle has collided
Factors that can only be seen and measured
after a collision has occurred do not play a
decisive role in the deployment of an air bag,
nor do they provide an indication of air bag
deployment.
The vehicle may be deformed significantly,
e.g. the hood or the fender, without an air bag
being deployed. This is the case if only parts
which are relatively easily deformed are
affected and the rate of deceleration is not
high. Conversely, air bags may be deployed
even though the vehicle suffers only minor
deformation. This is the case if, for example,
very rigid vehicle parts such as longitudinal
body members are hit, and sufficient
deceleration occurs as a result.
i The front Emergency Tensioning Devices
can only be triggered if the seat belt
tongues on the front seats are correctly
engaged in the seat belt buckles.
i Not all air bags are deployed in an
accident. The different air bag systems
work independently of each other.
How the air bag system works is
determined by predicting the severity of
the accident, especially vehicle
deceleration or acceleration, and the type
of accident:
R head-on collision
R side impact
R rollover
Safety guidelines for seat belts,
Emergency Tensioning Devices (ETDs)
and air bags G
WARNING
R Damaged seat belts

or seat belts that have
been subjected to stress in an accident
must be replaced. Their anchoring points
must also be checked. Only use seat belts installed or supplied by an authorized
Mercedes-Benz Center.
R Air bags and pyrotechnic Emergency
Tensioning Devices (ETDs) contain
perchlorate material, which may require
special handling and regard for the
environment. Check your

national disposal
guidelines. In California, see
www.dtsc.ca.gov/HazardousWaste/
Perchlorate/index.cfm.
R Air bags and ETDs are designed to function
on a one-time-only basis. An air bag or ETD
that has deployed must be replaced.
R Do not pass seat belts over sharp edges.
They could tear.
R Do not make any modification that could
change the effectiveness of the seat belts.
R Do not bleach or dye seat belts, as this may
severely weaken them. In a crash, they may
not be able to provide adequate protection.
R Do not make any modifications to the SRS
wiring or components.
R Do not modify or remove any components
or parts of the SRS.
R Do not install additional trim material, seat
covers, badges, etc. to the:
-padded steering wheel boss
- knee bag covers
- front-passenger air bag cover
- outer side of front seat bolsters
- outer seat bolsters of the rear bench seat
backrest
- roof frame trim
R Do not install additional electrical/
electronic equipment on or near SRS
components and wiring.
R Keep the area between the air bags and
occupants free of objects (e.g. packages,
handbags, umbrellas etc.).
R Do not hang any objects such as coat
hangers on the coat hooks or the grab
handle above the door. These items may be
thrown around in the vehicle and cause40
Occupant safety
Safety
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