2012 MERCEDES-BENZ B-CLASS open gas tank

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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Problems with the transmission
Problem Possible causes/consequences and
M SolutionsThe transmission has
problems shifting gear. The transmission is losing oil.
X
Have the transmission checked at a qualified specialist
workshop immediately. The acceleration ability
is deteriorating.
The transmission no
longer shifts into all of
the gears.
Reverse gear can no
longer be engaged. The transmission is in emergency mode.
X
Stop the vehicle.
X Shift the transmission to position P.
X Switch off the engine.
X Wait at least 10 seconds before restarting the engine.
X Shift the transmission to position D.
X Have the transmission checked at a qualified specialist
workshop immediately. Refueling
Important safety notes
G
WARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is a risk of fire and
explosion.
You must avoid fire, open flames, creating
sparks and smoking. Switch off the engine
and, if applicable,
the auxiliary heating before
refueling. G
WARNING
Fuel is poisonous and hazardous to health.
There is a risk of injury.
You must make

sure that fuel does not come
into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or others come into contact with fuel,
observe the following:
R Wash away fuel from skin immediately
using soap and water.
R If fuel comes into contact with your eyes,
immediately rinse them thoroughly with clean water. Seek medical assistance
without delay.
R If fuel is swallowed, seek medical
assistance without delay. Do not induce
vomiting.
R Immediately change out of clothing which
has come into contact with fuel. G
WARNING
Electrostatic buildup can create sparks and
ignite fuel vapors. There is a risk of fire and
explosion.
Always touch the

vehicle body before opening
the fuel filler flap or touching the fuel pump
nozzle. Any existing electrostatic buildup is
thereby discharged.
! Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the
ignition if you accidentally refuel with the
wrong fuel. Otherwise, the fuel will enter
the fuel system. Even small amounts of the
wrong fuel could result in damage to the
fuel system and the engine. The repair
costs are high. Notify a qualified specialist
workshop and have the fuel tank and fuel
lines drained completely. Refueling
147
Driving and parking Z
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Fuel
Important safety notes G
WARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is a risk of fire and
explosion.
You must avoid fire, open flames, creating
sparks and smoking. Switch off the engine
and, if applicable,
the auxiliary heating before
refueling. G
WARNING
Fuel is poisonous and hazardous to health.
There is a risk of injury.
You must make

sure that fuel does not come
into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or others come into contact with fuel,
observe the following:
R Wash away fuel from skin immediately
using soap and water.
R If fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance
without delay.
R If fuel is swallowed, seek medical
assistance without delay. Do not induce
vomiting.
R Immediately change out of clothing which
has come into contact with fuel.
Tank capacity Model Total
capacity B 250 BlueEFFICIENCY
13.2 US gal
(50.0 l) Model Of which
reserve B 250 BlueEFFICIENCY
Approx.
1.6 US gal (6.0 l) Gasoline
Fuel grade
!
Do not use

diesel to refuel vehicles with a
gasoline engine. Do not switch on the
ignition if you accidentally refuel with the
wrong fuel. Otherwise, the fuel will enter
the fuel system. Even small amounts of the
wrong fuel could result in damage to the
fuel system and the engine. The repair
costs are high. Notify a qualified specialist
workshop and have the fuel tank and fuel
lines drained completely.
! You should only refuel with unleaded
premium-grade gasoline as this avoids
damaging the catalytic converter.
If engine running problems are apparent,
have the cause checked immediately and
repaired. Excess unburned fuel can
otherwise enter the catalytic converter,
leading to overheating and possibly
causing a fire.
! To ensure the longevity and full
performance of the engine, only premium-
grade unleaded gasoline may be used.
If there is no premium-grade unleaded
gasoline available and regular unleaded
gasoline must be used, please observe the
following precautions:
R only fill the fuel tank to half full with
regular unleaded gasoline and fill the rest
with premium-grade unleaded gasoline
as soon as possible.
R do not drive at the maximum speed.
R avoid sudden acceleration.330
Service products and filling capacities
Technical data
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