2012 MERCEDES-BENZ B-CLASS ECO mode

1, 2, 3 ...
12 V socket see Sockets A
ABS (Anti-lock Braking System) Display message ............................ 201
Function/notes ................................
59
Important safety notes .................... 59
Warning lamp ................................. 225
Activating/deactivating cooling
with air dehumidification ................. 123
Active Parking Assist Canceling ....................................... 176
Detecting parking spaces .............. 173
Display message ............................ 216
Exiting a parking space .................. 175
Function/notes ............................. 173
Important safety notes .................. 172
Parking .......................................... 174
ADAPTIVE BRAKE ................................. 64
Adaptive Brake Assist Function/notes ................................ 61
Adaptive brake lamps .........................62
Adaptive Highbeam Assist Display message ............................ 212
Function/notes ............................. 102
Switching on/off (on-board
computer) ...................................... 197
Additional speedometer ................... 196
Additives (engine oil) ........................332
Air bags Deployment ..................................... 39
Front air bag (driver, front
passenger) ....................................... 42
Important safety notes .................... 41
Knee bag .......................................... 44
Safety guidelines ............................. 40
Side impact air bag .......................... 44
Window curtain air bag ....................45
Air-conditioning system
see Climate control
Air vents
Important safety notes .................. 130
Rear ............................................... 131
Setting ........................................... 130Setting the center air vents
...........130
Setting the side air vents ............... 130
Alarm system
see ATA (Anti-Theft Alarm system)


Ambient lighting
Setting the brightness (on-board
computer) ...................................... 197
Anti-lock braking system
see ABS (Anti-lock Braking System)
Anti-theft alarm system
see ATA (Anti-Theft Alarm system)
Ashtray ............................................... 249
Assistance menu (on-board
computer) .......................................... 194
ASSYST PLUS Displaying a service message ........ 270
Hiding a service message .............. 270
Notes ............................................. 270
Resetting the service interval
display ........................................... 270
Service message ............................ 270
Special service requirements ......... 271
ATA (Anti-Theft Alarm system)
Activating/deactivating ................... 65
Function ........................................... 65
Switching off the alarm .................... 65
ATTENTION ASSIST
Activating/deactivating ................. 195
Display message ............................ 215
Function/notes ............................. 180
Audio menu (on-board computer) .... 192
Audio system see separate operating instructions
Authorized Centers
see Qualified specialist workshop
Authorized Mercedes-Benz Center
see Qualified specialist workshop
Authorized workshops
see Qualified specialist workshop
AUTO lights
Display message ............................ 211
see Lights
Automatic engine start (ECO start/
stop function) .................................... 137
Automatic engine switch-off (ECO
start/stop function) .......................... 137
Automatic headlamp mode ................994
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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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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Maintenance
The Service and Warranty Booklet describes
all the necessary maintenance work which
should be done at regular intervals.
Always have the Service and Warranty
Booklet with you when you bring the vehicle
to an authorized Mercedes-Benz Center. The
service advisor will record every service for
you in the Service and Warranty Booklet. Roadside Assistance
The Mercedes-Benz Roadside Assistance
Program offers technical help in the event of
a breakdown. Calls to the toll-free Roadside
Assistance Hotline are answered by our
agents 24 hours a day, 365 days a year.
1-800-FOR-MERCedes(1-800-367-6372)
(USA)
1-800-387-0100
(Canada)
For additional information, refer to the
Mercedes-Benz Roadside Assistance
Program brochure (USA) or the "Roadside
Assistance" section in the Service and
Warranty booklet (Canada). You will find both
in your vehicle literature portfolio. Change of address or change of
ownership
In the event of a change of address, please
send us the

"Notification of Address Change"
in the Service and Guarantee booklet or
simply call the Mercedes-Benz Customer
Assistance Center (USA) at the hotline
number
1-800-FOR-MERCedes(1-800-367-6372) or
Customer Service Center (Canada) at
1-800-387-0100. This will assist us in
contacting you in a timely manner should the
need arise.
If you sell your Mercedes, please leave the
entire literature in the vehicle so that it is
available to the next owner. If you have purchased a used car, please send
us the
"Notification

of Used Car Purchase" in
the Service and Guarantee booklet or simply
call the Mercedes-Benz Customer Assistance
Center (USA) at the hotline number
1-800-FOR-MERCedes(1-800-367-6372) or
Customer Service (Canada) at
1-800-387-0100. Vehicle operation outside Canada
If you plan to operate your vehicle in foreign
countries, please be aware that:
R service facilities or

replacement parts may
not be readily available.
R unleaded fuel for vehicles with a catalytic
converter may not be available. Leaded fuel
may cause damage to the catalytic
converter.
R the fuel may have a considerably lower
octane rating. Unsuitable fuel can cause
engine damage.
Some Mercedes-Benz models are available
for delivery in Europe through our European
Delivery Program. For details, consult an
authorized Mercedes-Benz Center or write to
one of the following addresses.
In the USA
Mercedes-Benz USA, LLC
European Delivery Department
One Mercedes Drive
Montvale, NJ 07645-0350
In Canada
Mercedes-Benz Canada, Inc.
European Delivery Department
98 Vanderhoof Avenue
Toronto, Ontario M4G 4C9 22
Introduction
ProCarManuals.com

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note
that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: ( Y page 24).Panic alarm
X
To activate: press ! button : for at
least one second.
An alarm sounds and the exterior lighting
flashes.
X To deactivate: press ! button :
again.
or
X Insert the SmartKey into the ignition lock. Occupant safety
Important safety notes
G
WARNING
Modifications to or work improperly
conducted on restraint system components
or their wiring, as well as tampering with interconnected electronic systems, can lead
to the
restraint
systems no longer functioning
as intended.
Air bags or Emergency Tensioning Devices
(ETDs), for example, could deploy
inadvertently or fail to deploy in accidents
although the deceleration threshold for air
bag deployment is exceeded. Therefore,
never modify the restraint systems. Do not
tamper with electronic components or their
software.
In this section, you will learn the most
important facts about the restraint system
components of the vehicle.
The restraint system consists of:
R Seat belts
R Child restraint systems
R LATCH-type (ISOFIX) child seat securing
system
Additional protection is provided by:
R SRS (Supplemental Restraint System)
R Air bag system components with the
PASSENGER AIRBAG OFF indicator lamp
The different air bag systems work
independently of each other. The protective
functions of the system work in conjunction
with each other. Not all air bags are always
deployed in an accident.
i For information on infants and children
traveling with you in the vehicle restraint
systems for infants and children, see
"Children in the vehicle" ( Y page 50). SRS (Supplemental Restraint System)
Introduction Supplemental Restraint System (SRS) with:
R
The 6 SRS warning lamp
R Air bags
R Air bag control unit (with crash sensors)38
Occupant safety
Safety
ProCarManuals.com

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note
that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: ( Y page 24).SmartKey
Important safety notes
G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open the doors, thus endangering other
people or road users.
R get out and disrupt traffic.
R operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R release the parking brake.
R shift the automatic transmission out of
parking position P.
R starting the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you

and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children. G
WARNING
If persons, particularly children are subjected
to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle. G
WARNING
If you attach heavy or large objects to the
SmartKey, the SmartKey could be
unintentionally turned in

the ignition lock. This
could cause the engine to be switched off.
There is a risk of an accident.
Do not attach any heavy or large objects to
the SmartKey. Remove any bulky key rings
before inserting the SmartKey into the
ignition lock.
! Keep the SmartKey away from strong
magnetic fields. Otherwise, the remote
control function could be affected.
Strong magnetic fields can occur in the
vicinity of powerful electrical installations.
Do not keep the SmartKey:
R with electronic devices, e.g. a mobile
phone or another SmartKey
R with metallic objects, e.g. coins or metal
foil
R inside metallic objects, e.g. a metal case SmartKey functions
:
& To lock the vehicle
; % To unlock the vehicle
X To unlock centrally: press button ;.
If you do not open the vehicle within
approximately 40 seconds of unlocking:
R the vehicle is locked again.
R the theft

deterrent locking system is armed
again. 68
SmartKey
Opening and closing
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Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note
that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: ( Y page 24).Exterior lighting
General notes
For reasons of safety, Mercedes-Benz
recommends that you drive with the lights
switched on even

during the daytime. In some
countries, operation of the headlamps varies
due to legal requirements and self-imposed
obligations. Driving abroad
Conversion to symmetrical low beam Switch the headlamps to symmetrical low
beam in countries in which traffic drives on
the opposite
side

of the road from the country
where the vehicle is registered. This prevents
glare to oncoming traffic. When using
symmetrical lights, the edge of the road is not
lit as widely and as far ahead as normal.
Have the headlamps converted at a qualified
specialist workshop as close to the border as
possible before driving in these countries.
Conversion to asymmetrical low beam
after returning Have the headlamps converted back to
asymmetrical low-beam headlamps at a
qualified specialist workshop as soon as
possible after crossing the border again. Setting the exterior lighting
Setting options Exterior lighting can be set using:
R
the light switch
R the combination switch ( Y page 100)
R the on-board computer (Y page 197)
Light switch Operation
1W
Left-hand standing lamps
2X Right-hand standing lamps
3T Parking lamps, license plate and
instrument cluster lighting
4Ã Automatic headlamp mode,
controlled by the light sensor
5L Low-beam/high-beam headlamps
BR Rear fog lamp
CN Fog lamp (only vehicles with front fog
lamps)
If you hear a warning tone when you leave the
vehicle, the lights may still be switched on.
X Turn the light switch to Ã.
The exterior lighting (except the parking/
standing lamps) switches off automatically if
you:
R remove the
SmartKey

from the ignition lock
R open the driver's door with the SmartKey
in position 0.98
Exterior lighting
Lights and windshield wipers
ProCarManuals.com

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note
that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
i Read the information on qualified
specialist workshops: ( Y page 24).Overview of climate control systems
Important safety notes
Observe the settings recommended on the
following pages. The windows could
otherwise fog up.
To prevent the windows from fogging up:
R switch off climate control only briefly
R switch on air-recirculation mode only
briefly
R switch on the cooling with air
dehumidification function
R switch on the defrost windshield function
briefly, if required
The automatic climate control regulates the
temperature and the humidity of the vehicle
interior and filters out undesirable
substances from the air.
Automatic climate control/dual-zone
automatic climate control is only operational
when the engine is running. Optimum
operation is only achieved with the side
windows and panorama

roof with power tilt/
sliding panel closed.
The residual heat function can only be
activated or deactivated with the ignition
switched off (Y page 129).
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the
convenience opening feature ( Y page 78).This will speed up the cooling process and
the desired vehicle interior temperature
will be reached more quickly.
i The integrated filter can filter out most
particles of dust,

and completely filters out
pollen. A clogged filter reduces the amount
of air supplied to the vehicle interior. For
this reason, you should always observe the
interval for replacing the filter, which is
specified in the Maintenance Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Maintenance
Booklet.
i It is possible that the dehumidification
function of the climate control system may
be activated automatically an hour after the
SmartKey has been removed. The vehicle
is then ventilated for 30 minutes. 118
Overview of climate control systems
Climate control
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