2012 MERCEDES-BENZ B-CLASS brake fluid

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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Preparing the vehicle
.....................281
TIREFIT kit ...................................... 282
see Emergency spare wheel

Floormats ........................................... 264
Fog lamps Extended range .............................. 102
Switching on/off .............................. 99
Folding table ...................................... 239
Front fog lamps Display message ............................ 210
Switching on/off .............................. 99
Front-passenger seat
Folding the backrest forward/back 239
Fuel
Additives ........................................ 331
Consumption statistics ..................189
Displaying the current
consumption .................................. 190
Displaying the range ...................... 190
Driving tips .................................... 152
Fuel gauge ....................................... 29
Grade (gasoline) ............................ 330
Important safety notes .................. 330
Premium-grade unleaded gasoline . 330
Problem (malfunction) ...................149
Refueling ........................................ 147
Tank content/reserve fuel .............330
Fuel filler flap
Opening/closing ............................ 148
Fuel level
Calling up the range (on-board
computer) ...................................... 190
Fuel tank
Capacity ........................................ 330
Problem (malfunction) ...................149
Fuses
Allocation chart ............................. 295
Before changing ............................. 294
Fuse box in the engine
compartment ................................. 294
Fuse box in the front-passenger
footwell .......................................... 295
Important safety notes .................. 294 G
Garage door opener Clearing the memory ..................... 263
Important safety notes
..................260
Opening/closing the garage door ..262
Programming (button in the rear-
view mirror) ................................... 260
Gear or selector lever (cleaning
guidelines) ......................................... 276
Genuine parts ...................................... 20
Glove box ........................................... 237 H
Handbrake see Parking brake


Hazard warning lamps ......................101
Display message ............................ 223
Headlamps
Adding fluid to cleaning system .....269
Cleaning system (function) ............ 101
Cleaning system (notes) ................334
Fogging up ..................................... 103
see Automatic headlamp mode
Head restraints
Adjusting ......................................... 89
Adjusting (electrically) .....................89
Adjusting (manually) ........................ 89
Adjusting (rear) ................................ 90
Installing/removing (rear) ................ 90
Heating
see Climate control
High-beam headlamps
Changing bulbs .............................. 107
Display message ............................ 210
Switching Adaptive Highbeam
Assist on/off ................................. 102
Switching on/off ........................... 100
Hill start assist .................................. 136
HOLD function Deactivating ................................... 168
Display message ............................ 215
Function/notes ............................. 168
Hood
Closing ........................................... 267
Display message ............................ 22210
Index
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(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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The blue
K indicator lamp in the
instrument cluster lights
up when the high-
beam headlamps are switched on.
X To switch off the high-beam
headlamps: move the combination

switch
back to its normal position.
The blue K indicator lamp in the
instrument cluster goes out.
i Vehicles with Adaptive Highbeam Assist:
when Adaptive Highbeam Assist is active,
it controls activation of the high-beam
headlamps (Y page 102).
High-beam flasher X
To switch on: turn the SmartKey in the
ignition lock to position 1 or 2 or start the
engine.
X Pull the combination switch in the direction
of arrow =. Hazard warning lamps
The hazard warning lamps automatically
switch on if:
R
an air bag is deployed
R the vehicle decelerates rapidly from a
speed of
more

than 45mph (70 km/h) and
comes to a standstill
X To switch on the hazard warning lamps:
press button :.
All turn signals flash. If you now switch on
a turn signal

using the combination switch, only the turn signal lamp on the
corresponding side
of

the vehicle will flash.
X To switch off the hazard warning
lamps: press button :.
The hazard warning lamps switch off
automatically if the vehicle reaches a speed
of over 6mph (10km/h) again after a full
brake application.
i The hazard warning lamps still operate if
the ignition is switched off. Headlamp cleaning system
The headlamps are cleaned automatically if
the "Wipe with washer fluid" function is
operated five times

while the lights are on and
the engine is running (Y page 111). When you
switch off the ignition, the automatic
headlamp cleaning system is reset and
counting is resumed from 0. Cornering light function
The cornering light function improves the
illumination of the road over a wide angle in
the direction
you

are turning, enabling better
visibility in tight bends, for example. The
cornering light function can only be activated
when the low-beam headlamps are switched
on. Exterior lighting
101
Lights and windshield wipers Z
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Transmission position and drive
program display
The current transmission position and drive
program appear in the multifunction display.
:
Transmission position display
; Drive program display
i The arrows in the transmission position
display show how and into which
transmission positions you can change
using the DIRECT SELECT lever.
! If the
transmission
position display in the
multifunction display is not working, you
should pull away carefully to check whether
the desired transmission position is
engaged. Ideally, you should select
transmission position D and drive program
E or S.
Engaging park position P X
Push the DIRECT SELECT lever in the
direction of arrow P.
Transmission position display P

is shown in
the multifunction display.
i When you engage park position P, make
sure that the

transmission position display
shows P in the multifunction display.
i You can only engage park position P when
the vehicle is stationary.
i The automatic transmission shifts into
park position P automatically:
R if you open the driver's door while the
vehicle is stationary in transmission
position D or R
R if you open the door while traveling at
very low speeds in transmission position
D or R In addition, a warning tone sounds and a
display message is shown.
i Depressing the brake and pushing the
DIRECT SELECT lever up or down
disengages the parking lock. The
transmission is in N neutral.
At transmission fluid temperatures below
Ò4 ‡ (Ò 20

†), you can only shift out of park
position P into another transmission
position when the engine is running.
In order to shift from park position P
directly into R or D:
R depress the brake pedal and
R push the DIRECT SELECT lever up or
down past the first point of resistance
! If the engine speed is too high or the
vehicle is moving, do not shift the
automatic transmission directly from D to
R, from R to D or directly to P. The
automatic transmission could otherwise be
damaged.
Engaging reverse gear R !
Only shift the automatic transmission to
R when the vehicle is stationary.
i The ECO start/stop function is not
available when reverse gear is engaged.
Further information on

the ECO start/stop
function ( Y page 136).
X When the vehicle is stationary, depress the
brake pedal.
X Push the DIRECT SELECT lever up past the
first point of resistance.
Shifting to neutral N X
When the vehicle is stationary, depress the
brake pedal.
X Push the DIRECT SELECT lever up or down
to the first point of resistance.
If the engine has been switched off, the
automatic transmission automatically shifts
to N. Automatic transmission
141
Driving and parking Z
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brake pads. This can result in a significantly
longer braking distance.
R
Brake occasionally to
remove any possible
salt residue. Make sure that you do not
endanger other road users when doing so.
R Carefully depress the brake pedal and the
beginning and end of a journey.
R Maintain a greater distance to the vehicle
ahead.
Servicing the brakes !
If the red

brake warning lamp lights up in
the instrument cluster and you hear a
warning tone while the engine is running,
the brake fluid level may be too low.
Observe additional warning messages in
the multifunction display.
The brake fluid level may be too low due to
brake pad wear or leaking brake lines.
Have the brake system checked
immediately. This work should be carried
out at a qualified specialist workshop.
! A function or performance test should
only be carried out on a 2-axle
dynamometer. If you are planning to have
the vehicle tested on such a dynamometer,
contact an authorized Mercedes-Benz
Center to obtain further information first.
Otherwise, you could damage the drive
train or the brake system.
! As the ESP ®
system operates
automatically, the engine and the ignition
must be switched off (the SmartKey must
be in position 0 or 1 in the ignition lock) if:
R the electric parking brake is tested on a
brake dynamometer (for a maximum of
ten seconds)
R the vehicle is towed with the front axle
raised.
Braking triggered automatically by ESP ®
may seriously damage the brake system.
All checks and maintenance work on the
brake system must be carried out at a qualified specialist workshop. Consult a
qualified
specialist workshop

to arrange this.
Have brake pads installed and brake fluid
replaced at a qualified specialist workshop.
If the brake system has only been subject to
moderate loads, you should test the
functionality of your brakes at regular
intervals.
You can find a description of Brake Assist
(BAS) on ( Y page 59).
Mercedes-Benz recommends that you only
have brake pads/linings installed on your
vehicle which have been approved for
Mercedes-Benz vehicles or which correspond
to an equivalent quality standard. Brake
pads/linings which have not been approved
for Mercedes-Benz vehicles or which are not
of an equivalent quality could affect your
vehicle's operating safety.
Mercedes-Benz recommends that you only
use brake fluid that has been specially
approved for your vehicle by Mercedes-Benz,
or which corresponds to an equivalent quality
standard. Brake fluid which has not been
approved for Mercedes-Benz vehicles or
which is not of an equivalent quality could
affect your vehicle's operating safety.
Checking brake lining thickness You can measure the break pad/lining
thickness using a test gauge. Color-coding
(green or
red)

on the test gauge allows you to
determine whether the brake pad/lining
thickness is still sufficient. The test gauge is
in the vehicle document wallet in the glove
box. Driving tips
155
Driving and parking Z
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Display messages Possible causes/consequences and
M Solutions$(USA
only)J(Canada
only)
Check Brake Fluid
Level There is not enough brake fluid in the brake fluid reservoir.
In addition, the $ (USA only)/J (Canada only) warning
lamp lights up in the instrument cluster and a warning tone
sounds.
G WARNING
The braking effect may be impaired.
There is a risk of an accident.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road
and traffic conditions. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away ( Y page 149).
X Consult a qualified specialist workshop.
X Do not add brake fluid. This does not correct the malfunction. #
Check Brake Pad
Wear The brake pads/linings have reached their wear limit.
X
Visit a qualified specialist workshop. G
mbrace Inoperative One or more main features of the mbrace system are
malfunctioning.
X
Have the mbrace system checked immediately at a qualified
specialist workshop. 6
SRS Malfunction
Service Required There is a malfunction in the SRS (Supplemental Restraint
System). The 6 warning lamp also lights up in the instrument
cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
Further information on occupant safety (Y page 38). Display messages
207
On-board computer and displays Z
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Vehicle
Display messages Possible causes/consequences and
M SolutionsShift to 'P' or 'N'
to Start Engine You have attempted to start the engine with the transmission in
position R or D.
X
Shift the transmission to position P or N.Auxiliary Battery
Malfunction The auxiliary battery for the automatic transmission is no longer
being charged.
X
Visit a qualified specialist workshop at the next opportunity.
X Until then, set the automatic transmission to position P before
you switch off the engine.
X Before leaving the vehicle, apply the electric parking brake. Depress Brake to
Start Engine You have attempted to start the engine with the transmission in
position N without depressing the brake pedal.
X
Depress the brake pedal. To Deselect P or N,
Depress Brake and
Start Engine You have attempted to shift the transmission to position
R or D
without starting the engine.
X Start the engine.
X Depress the brake pedal.
i It is only possible to shift the transmission from position P to
the desired position if you depress the brake pedal. Only then
can the parking lock be deactivated. If you do not depress the
brake pedal, you can move the DIRECT SELECT lever but the
parking lock remains engaged.
i At transmission fluid temperatures below Ò4 ‡ (Ò20 †) you
can only shift out of position P into another transmission
position when the engine is running. Apply Brake to
Shift from 'P' You have attempted to move the transmission selector lever to
position R, N or D without depressing the brake pedal.
X
Depress the brake pedal. Transmission Not
in P
Risk of Vehicle
Rolling Away The driver's door is open and the transmission is in position
R, N
or D.
A warning tone also sounds.
X Shift the transmission to position P.
X Secure the vehicle against rolling away ( Y page 149).220
Display messagesOn-board computer and displays
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