tires 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

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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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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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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Temperature
Coolant .......................................... 186
Outside temperature ...................... 187 Setting (climate control)
................125
Theft deterrent systems
ATA (Anti-Theft Alarm system) .........65
Immobilizer ...................................... 64
Through-loading ................................ 239
Time see separate operating instructions
TIREFIT kit .......................................... 282
Tire pressure Checking manually ........................305
Display message ............................ 219
Maximum ....................................... 304
Notes ............................................. 303
Not reached (TIREFIT) .................... 284
Reached (TIREFIT) .......................... 284
Recommended ............................... 301
Tire pressure loss warning
system
Important safety notes .................. 305
Restarting ...................................... 305
Tires
Aspect ratio (definition) ................. 318
Average weight of the vehicle
occupants (definition) .................... 316
Bar (definition) ............................... 316
Changing a wheel .......................... 319
Characteristics .............................. 316
Checking ........................................ 299
Definition of terms ......................... 316
Direction of rotation ......................319
Display message ............................ 219
Distribution of the vehicle
occupants (definition) .................... 318
DOT, Tire Identification Number
(TIN) ............................................... 315
DOT (Department of
Transportation) (definition) ............ 316
GAWR (Gross Axle Weight Rating)
(definition) ..................................... 317
GVW (Gross Vehicle Weight)
(definition) ..................................... 317
GVWR (Gross Vehicle Weight
Rating) (definition) .........................317
Important safety notes .................. 298Increased vehicle weight due to
optional equipment (definition)
......316
Kilopascal (kPa) (definition)
...........317
Labeling (overview) ........................ 312
Load bearing index (definition) ...... 318
Load index ..................................... 315
Load index (definition) ...................317
M+S tires ....................................... 300
Maximum loaded vehicle weight
(definition) ..................................... 317
Maximum load on a tire (definition) 317
Maximum permissible tire
pressure (definition) ....................... 317
Maximum tire load ......................... 310
Maximum tire load (definition) .......317
MOExtended tires .......................... 300
Optional equipment weight
(definition) ..................................... 318
PSI (pounds per square inch)
(definition) ..................................... 317
Replacing ....................................... 319
Service life ..................................... 300
Sidewall (definition) .......................318
Speed rating (definition) ................ 317
Storing ........................................... 319
Structure and characteristics
(definition) ..................................... 316
Summer tires ......................... 157, 300
Temperature .................................. 312
TIN (Tire Identification Number)
(definition) ..................................... 318
Tire bead (definition) ......................318
Tire pressure (definition) ................ 318
Tire pressures (recommended) ...... 316
Tire size (data) ............................... 323
Tire size designation, load-bearing
capacity, speed rating .................... 313
Tire tread ....................................... 299
Tire tread (definition) .....................318
Total load limit (definition) ............. 318
Traction ......................................... 311
Traction (definition) ....................... 318
Tread wear ..................................... 311
Uniform Tire Quality Grading
Standards ...................................... 311
Uniform Tire Quality Grading
Standards (definition) .................... 316
Unladen weight (definition) ............ 317 Index
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PASSENGER AIR BAG OFF ...............
53
Reserve fuel ................................... 231
Seat belt
........................................ 224
SRS ................................................ 230
Warranty ............................................ 328
Washer fluid Display message ............................ 223
Wheel bolt tightening torque ...........322
Wheel chock ...................................... 320
Wheels Changing a wheel .......................... 319
Checking ........................................ 299
Cleaning ......................................... 273
Cleaning (warning) .........................319
Emergency spare wheel ................. 325
Important safety notes .................. 298
Interchanging/changing ................319
Mounting a new wheel ................... 322
Mounting a wheel .......................... 319
Removing a wheel ..........................322
Storing ........................................... 319
Tightening torque ........................... 322
Wheel size/tire size ....................... 323
Window curtain air bag
Display message ............................ 208
Operation ......................................... 45
Windows
see Side windows
Windshield
Defrosting ...................................... 127
Windshield washer fluid
see Windshield washer system
Windshield washer system
Adding washer fluid .......................269
Notes ............................................. 334
Windshield wipers
Display message ............................ 223
Problem (malfunction) ...................115
Rear window wiper ........................112
Replacing the wiper blades ............ 112
Switching on/off ........................... 111
Winter driving
Slippery road surfaces ................... 157
Snow chains .................................. 301
Winter operation
General notes ................................ 300
Winter tires
M+S tires ....................................... 300Wiper blades
Cleaning ......................................... 274
Important safety notes
..................112
Replacing (rear window) ................113
Replacing (windshield) ................... 113
Wooden trim (cleaning instructions) 276
Workshops see Qualified specialist workshop Z
ZONE function Switching on/off ........................... 126 Index
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Have aftermarket accessories installed at
a qualified specialist workshop.
You could jeopardize the operating safety of
your vehicle if
you use parts, tires and wheels
as well as accessories relevant to safety
which have not been approved by Mercedes.
This could lead to malfunctions in safety-
relevant systems, e.g. the brake system. Use
only genuine Mercedes-Benz parts or parts of
equal quality. Only use tires, wheels and
accessories that have been specifically
approved for your vehicle.
Genuine Mercedes-Benz parts are subject to
strict quality control. Every part has been
specifically developed, manufactured or
selected for and adapted to Mercedes-Benz
vehicles. Only genuine Mercedes-Benz parts
should therefore be used.
More than 300,000 different genuine
Mercedes-Benz parts are available for
Mercedes-Benz models.
All authorized Mercedes-Benz Centers
maintain a supply of genuine Mercedes-Benz
parts for necessary service and repair work.
In addition, strategically located parts
delivery centers provide quick and reliable
parts service.
Always specify the vehicle identification
number (VIN) ( Y page 328) and the engine
number (Y page 329) when ordering genuine
Mercedes-Benz parts. Operator's Manual
General notes
Before you first

drive off, read this Operator's
Manual carefully and familiarize yourself with
your vehicle.
For your own safety and a longer vehicle life,
follow the instructions and warning notices in
this manual. Disregarding them may lead to
damage to the vehicle or personal injury.
Vehicle damage resulting from the disregard
of the instructions is not covered by the
Mercedes-Benz Limited Warranty. Vehicle equipment
This Operator's Manual describes all models
and all standard and optional equipment of
your vehicle available at the time of going to
print. 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. The

equipment in your vehicle
may therefore differ from some of the
descriptions or illustrations.
The original purchase agreement lists all
systems installed in your vehicle.
Contact an authorized Mercedes-Benz Center
if you have any questions about equipment or
operation.
The Operator's Manual and Maintenance
Booklet are important documents and should
be kept in the vehicle. Service and vehicle operation
Service and literature
Your vehicle is

covered under the terms of the
warranties printed in the Service and
Warranty Information booklet. Your
authorized Mercedes-Benz Center will
exchange or repair any defective parts
originally installed in the vehicle in
accordance with the terms of the following
warranties:
R New Vehicle Limited Warranty
R Emission Systems Warranty
R Emission Performance Warranty
R California, Connecticut, Maine,
Massachusetts, New York, Pennsylvania,
Rhode Island and Vermont Emission
Control Systems Warranty
R State warranty enforcement laws (lemon
laws) Introduction
21 Z
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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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R
ADAPTIVE BRAKE ( Y
page 64)
(Y page 64)
R STEER CONTROL ( Y page 64)Important safety notes
If you fail to adapt your driving style or
become distracted, the driving safety
systems can neither reduce the risk of
accident nor override the laws of physics.
Driving safety systems are merely aids
designed to assist driving. You are
responsible for the distance to the vehicle in
front, for vehicle speed and for braking in
good time. Always

adapt your driving style to
suit the prevailing road, weather and traffic
conditions and maintain a safe distance from
the vehicle in front. Drive carefully.
i The driving safety systems described only
work as effectively as possible when there
is adequate contact between the tires and
the road surface. Pay particular attention
to the information regarding tires,
recommended minimum tire tread depths
etc. in the "Wheels and tires" section
(Y page 298).
In wintry driving conditions, always use
winter tires (M+S tires) and if necessary,
snow chains. Only in this way will the
driving safety systems described in this
section work as effectively as possible. ABS (Anti-lock Braking System)
Important safety notes i
Observe the "Important safety notes"
section for driving safety systems
(Y page 59). G
WARNING
If ABS is faulty, the wheels could lock when
braking. The steerability and braking
characteristics may be severely impaired.
Additionally, further driving safety systems are deactivated. There is an increased danger
of skidding and accidents.
Drive on carefully. Have ABS checked
immediately at a qualified specialist
workshop.
When ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe

the information
on the ABS warning lamp ( Y page 225) and
display messages which may be shown in the
instrument cluster (Y page 201).
ABS regulates brake pressure in such a way
that the wheels do not lock when you brake.
This allows you to continue steering the
vehicle when braking.
ABS works from a speed of about 5 mph
(8 km/h) upwards, regardless of road-surface
conditions. ABS works on slippery roads,
even if you only brake gently.
The ! ABS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out when the engine is running.
Braking X
If ABS intervenes: continue to
depress the
brake pedal vigorously until the braking
situation is over.
X To make a full brake application:
depress the brake pedal with full force.
If ABS intervenes when braking, you will feel
a pulsing in the brake pedal.
The pulsating brake pedal can be an
indication of hazardous road conditions, and
functions as a reminder to take extra care
while driving. BAS (Brake Assist System)
i Observe the "Important safety notes"
section ( Y page 59). Driving safety systems
59
Safety Z
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