2012 MERCEDES-BENZ B-CLASS key

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
ProCarManuals.com

Switching the rear window
defroster on/off
............................ 128
Switching the ZONE function on/
off
.................................................. 126
Cockpit
Overview .......................................... 28
see Instrument cluster
COLLISION PREVENTION ASSIST
Display message ............................ 201
Operation/notes .............................. 60
COMAND
see separate operating instructions
Combination switch ..........................100
Compass Calibrating ..................................... 264
Calling up ....................................... 263
Setting ........................................... 263
Consumption statistics (on-board
computer) .......................................... 189
Convenience closing feature ..............78
Convenience opening feature ............78
Coolant (engine) Checking the level ......................... 269
Display message ............................ 212
Filling capacity ............................... 333
Important safety notes .................. 333
Temperature gauge ........................ 186
Warning lamp ................................. 231
Cooling
see Climate control
Cornering light function
Changing bulbs .............................. 108
Display message ............................ 209
Function/notes ............................. 101
Crash-responsive emergency
lighting ............................................... 104
Cruise control Activation conditions .....................158
Cruise control lever .......................158
Deactivating ................................... 159
Display message ............................ 218
Driving system ............................... 157
Function/notes ............................. 158
Important safety notes .................. 157
Setting a speed .............................. 159
Storing and maintaining current
speed ............................................. 158Cup holder
Center console .............................. 248
Important safety notes ..................247
Rear compartment
.........................248
Customer Assistance Center (CAC) ...24
Customer Relations Department .......24 D
Dashboard see Instrument cluster


Dashboard lighting
see Instrument cluster lighting
Data
see Technical data
Daytime running lamps
Display message ............................ 211
Switching on/off (on-board
computer) ...................................... 197
Switching on/off (switch) ................ 99
Dealerships
see Qualified specialist workshop
Declarations of conformity ................. 23
Delayed switch-off Exterior lighting (on-board
computer) ...................................... 198
Interior lighting .............................. 198
Diagnostics connection ......................24
Digital speedometer .........................190
DIRECT SELECT lever see Automatic transmission
Display (cleaning instructions) ........275
Display messages ASSYST PLUS ................................ 270
Calling up (on-board computer) ..... 200
Driving systems ............................. 215
Engine ............................................ 212
General notes ................................ 200
Hiding (on-board computer) ........... 200
Lights ............................................. 208
Safety systems .............................. 201
SmartKey ....................................... 223
Tires ............................................... 219
Vehicle ........................................... 220
Distance display (on-board
computer) .......................................... 194 Index
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Distance recorder
............................. 189
see Odometer

see Trip odometer
Distance warning function
Activating/deactivating ................. 195
Function/notes ................................ 60
Warning lamp ................................. 233
DISTRONIC PLUS
Activation conditions .....................161
Cruise control lever .......................161
Deactivating ................................... 165
Display message ............................ 217
Displays in the multifunction
display ........................................... 163
Driving tips .................................... 166
Function/notes ............................. 160
Important safety notes .................. 159
Setting the specified minimum
distance ......................................... 165
Warning lamp ................................. 233
Doors
Automatic locking (on-board
computer) ...................................... 198
Automatic locking (switch) ............... 74
Central locking/unlocking
(SmartKey) ....................................... 68
Control panel ................................... 35
Display message ............................ 222
Emergency locking ........................... 75
Emergency unlocking .......................75
Important safety notes .................... 73
Opening (from inside) ......................73
Drinking and driving .........................152
Drive program Automatic ...................................... 144
Display (DIRECT SELECT lever) ...... 141
Manual ........................................... 144
Driver's door
see Doors
Driving abroad
Mercedes-Benz Service .................271
Symmetrical low beam .................... 98
Driving on flooded roads ..................156
Driving safety systems ABS (Anti-lock Braking System) ....... 59
ADAPTIVE BRAKE ............................. 64
Adaptive Brake Assist ......................61
Adaptive brake lamps ...................... 62BAS (Brake Assist System)
..............59
COLLISION PREVENTION ASSIST ....60
Distance warning function
............... 60
Electronic brake force distribution ... 64
ESP ®
(Electronic Stability
Program) .................................... 62, 63
ETS (Electronic Traction System) ..... 62
Important safety information ........... 59
Overview .......................................... 58
STEER CONTROL ............................. 64
Driving systems
Active Parking Assist .....................172
ATTENTION ASSIST ........................ 180
Blind Spot Assist ............................ 181
Cruise control ................................ 157
Display message ............................ 215
DISTRONIC PLUS ........................... 159
HOLD function ............................... 167
Lane Keeping Assist ...................... 183
Lane Tracking package .................. 181
PARKTRONIC ................................. 169
Rear view camera .......................... 176
Driving tips
Automatic transmission ................. 143
Brakes ........................................... 154
Break-in period .............................. 134
Checking brake lining thickness ....155
DISTRONIC PLUS ........................... 166
Downhill gradient ........................... 154
Drinking and driving .......................152
Driving abroad ................................. 98
Driving in winter ............................. 157
Driving on flooded roads ................156
Driving on wet roads ...................... 156
Exhaust check ............................... 152
Fuel ................................................ 152
General .......................................... 152
Hydroplaning ................................. 156
Icy road surfaces ........................... 157
Limited braking efficiency on
salted roads ................................... 154
Snow chains .................................. 301
Symmetrical low beam .................... 98
Wet road surface ........................... 154
DVD audio (on-board computer) ...... 192
DVD video (on-board computer) ......1938
Index
ProCarManuals.com

E
EASY-VARIO-PLUS system Cargo compartment enlargement ..240
EBD (electronic brake force
distribution)
Display message ............................ 203
Function/notes ................................
64
ECO display
Function/notes ............................. 153
On-board computer ....................... 190
ECO start/stop function
Automatic engine start .................. 137
Automatic engine switch-off .......... 137
Deactivating/activating ................. 138
General information ....................... 136
Important safety notes .................. 136
Electronic Stability Program
see ESP ®
(Electronic Stability Program)
Emergency release
Driver's door .................................... 75
Vehicle ............................................. 75
Emergency spare wheel
General notes ................................ 325
Important safety notes .................. 325
Removing ....................................... 326
Technical data ............................... 326
Emergency Tensioning Devices
Activation ......................................... 39
Function ........................................... 49
Safety guidelines ............................. 40
Emergency unlocking
Tailgate ............................................ 76
Emissions control
Service and warranty information .... 21
Engine
Check Engine warning lamp ........... 231
Display message ............................ 212
ECO start/stop function ................ 136
Engine number ............................... 329
Irregular running ............................ 139
Jump-starting ................................. 289
Starting problems .......................... 139
Starting the engine with the
SmartKey ....................................... 135
Switching off .................................. 150
Tow-starting (vehicle) ..................... 294 Engine electronics
Problem (malfunction) ...................139
Engine oil
Adding ........................................... 268
Additives ........................................ 332
Checking the oil level ..................... 267
Checking the oil level using the
dipstick
.......................................... 268
Display message ............................ 214
Filling capacity ............................... 332
Notes about oil grades ................... 332
Notes on oil level/consumption .... 267
Viscosity ........................................ 332
ESP ®
(Electronic Stability
Program) Deactivating/activating ................. 194
Deactivating/activating (notes) ....... 63
Display message ............................ 201
ETS .................................................. 62
Function/notes ......................... 62, 63
Important safety information ........... 62
Warning lamp ................................. 227
ETS (Electronic Traction System) ....... 62
Exhaust check ................................... 152
Exhaust pipe (cleaning instructions) 275
Exterior lighting Setting options ................................ 98
see Lights
Exterior mirrors
Adjusting ......................................... 92
Dipping (automatic) .........................93
Folding in/out (automatically) ......... 93
Folding in/out (electrically) ............. 93
Folding in when locking (on-board
computer) ...................................... 199
Out of position (troubleshooting) .....93
Setting ............................................. 93
Storing settings (memory function) .. 95
Storing the parking position ............. 94
Eyeglasses compartment ................. 237 F
Filler cap see Fuel filler flap


First-aid kit ......................................... 280
Flat tire MOExtended tires .......................... 281 Index
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ProCarManuals.com

Important safety notes ..................
266
Opening ......................................... 266
Hydroplaning ..................................... 156I
Ignition lock see Key positions

Immobilizer .......................................... 64
Indicator lamps see Warning and indicator lamps
Instrument cluster
Overview .......................................... 29
Settings ......................................... 196
Warning and indicator lamps ...........30
Instrument cluster lighting .............. 186
Interior lighting ................................. 103
Automatic control .......................... 104
Delayed switch-off (on-board
computer) ...................................... 198
Emergency lighting ........................ 104
Manual control ............................... 104
Overview ........................................ 103
Reading lamp ................................. 103
Setting the brightness of the
ambient lighting (on-board
computer) ...................................... 197J
Jack Storage location ............................ 280
Using ............................................. 320
Jump starting (engine) ...................... 289K
Kickdown Driving tips .................................... 143
Manual drive program .................... 146
Knee bag .............................................. 44 L
Lamps see Warning and indicator lamps
Lane Keeping Assist
Activating/deactivating

.................195
Display message ............................ 215
Function/information .................... 183
Lane Tracking package .....................181
LATCH-type (ISOFIX) child seat
anchors ................................................ 54
License plate lamp Changing bulbs .............................. 111
License plate lamp (display
message) ............................................ 210
Light function, active Display message ............................ 211
Lighting
Light switch ..................................... 98
Lights
Activating/deactivating the
interior lighting delayed switch-off . 198
Automatic headlamp mode .............. 99
Cornering light function .................101
Display message ............................ 208
Driving abroad ................................. 98
Fog lamps ........................................ 99
Fog lamps (extended) ....................102
Hazard warning lamps ................... 101
High beam flasher .......................... 101
High-beam headlamps ...................100
Low-beam headlamps ...................... 99
Parking lamps ................................ 100
Rear fog lamp ................................ 100
Setting the brightness of the
ambient lighting (on-board
computer) ...................................... 197
Standing lamps .............................. 100
Switching Adaptive Highbeam
Assist on/off ................................. 197
Switching the daytime running
lamps on/off (on-board computer) 197
Switching the daytime running
lamps on/off (switch) ...................... 99
Switching the exterior lighting
delayed switch-off on/off (on-
board computer) ............................ 198 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
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
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