186Driving and operatingBrake preparation system
When approaching a vehicle ahead
so quickly that a collision is likely, the
brake preparation system slightly
pressurises the brakes. This reduces
the response time, when a manual or automatic braking is requested.
The brake system is prepared so that braking can occur more rapidly.
Emergency automatic braking
After the brake preparation and just
before the imminent collision, this
function automatically applies limited
braking to reduce the impact speed of the collision.
Forward looking brake assist
In addition to brake preparation
system and emergency automatic braking, the forward looking brake
assist function makes the brake assist more sensitive. In this way,
depressing the brake pedal slightly
results immediately in a strong
braking. This function helps the driver brake quicker and stronger before the
imminent collision.9 Warning
Active emergency braking is not
designed to apply strong
autonomous braking or to avoid automatically a collision. It is
designed to reduce the vehicle
speed before collision. It may not
react on stopped vehicles,
pedestrians or animals. After a
sudden lane change, the system
needs a certain time to detect the
next preceding vehicle.
The complete attention of the
driver is always required while
driving. The driver shall always be ready to take action and apply the brakes and steer to avoid
collisions. The system is designed
to work with all occupants wearing their seat belts.
System limitations
The active emergency braking has
limited or no function during rain,
snow or heavy dirt, as the radar
sensor can be covered by a water
film, dust, ice or snow. In case of
sensor blockage, clean the sensor
cover.
In some seldom cases the active
emergency braking system may
provide a short automatic braking in
situations that seem to be
unnecessary, for instance due to
traffic signs in a curve or due to
vehicles in another lane. This is
acceptable operation, the vehicle
does not need service. Firmly apply
the accelerator pedal to override the
automatic braking.
Settings
Settings can be changed in the
vehicle personalisation menu in the
Info-Display.
Select the relevant setting in
Settings in the Info-Display.
Vehicle personalisation 3 124.
Fault
In the event of a system service
requirement, a message is displayed
in the Driver Information Centre.
212Vehicle careVehicle careGeneral Information...................213
Accessories and vehicle modifications .......................... 213
Vehicle storage ........................213
End-of-life vehicle recovery .....214
Vehicle checks ........................... 214
Performing work ......................214
Bonnet ..................................... 214
Engine oil ................................. 215
Engine coolant ......................... 216
Power steering fluid .................217
Washer fluid ............................ 217
Brakes ..................................... 218
Brake fluid ............................... 218
Vehicle battery ......................... 218
Diesel fuel system bleeding .....220
Wiper blade replacement ........220
Bulb replacement .......................221
Halogen headlights ..................221
LED headlights ........................ 223
Fog lights ................................. 223
Tail lights ................................. 224
Side turn signal lights ..............226
Number plate light ...................227Interior lights ............................ 227
Instrument panel illumination ...228
Electrical system ........................228
Fuses ....................................... 228
Engine compartment fuse box . 229
Instrument panel fuse box .......231
Load compartment fuse box ....232
Vehicle tools .............................. 234
Tools ........................................ 234
Wheels and tyres .......................235
Winter tyres ............................. 235
Tyre designations ....................235
Tyre pressure .......................... 235
Tyre pressure monitoring system .................................... 237
Tread depth ............................. 240
Changing tyre and wheel size . 240
Wheel covers ........................... 240
Tyre chains .............................. 241
Tyre repair kit .......................... 241
Wheel changing .......................244
Spare wheel ............................ 246
Jump starting ............................. 250
Towing ....................................... 251
Towing the vehicle ...................251
Towing another vehicle ...........252Appearance care .......................253
Exterior care ............................ 253
Interior care ............................. 255
218Vehicle careCaution
Only washer fluid with a sufficient
antifreeze concentration provides
protection at low temperatures or
a sudden drop in temperature.
Brakes
In the event of minimum thickness of
the brake lining, a squealing noise
sounds during braking.
Continued driving is possible but
have the brake lining replaced as
soon as possible.
Once new brake linings are installed,
do not brake unnecessarily hard for
the first few journeys.
Brake fluid
9 Warning
Brake fluid is poisonous and
corrosive. Avoid contact with eyes,
skin, fabrics and painted surfaces.
The brake fluid level must be betweenthe MIN and MAX marks.
If fluid level is below MIN seek the
assistance of a workshop.
Brake and clutch fluid 3 258.
Vehicle battery
The vehicle battery is maintenance-
free, provided that the driving profile
allows sufficient charging of the
battery. Short-distance-driving and
frequent engine starts can discharge
the battery. Avoid the use of
unnecessary electrical consumers.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
Laying up the vehicle for more than
four weeks can lead to battery
discharge. Disconnect the clamp from the negative terminal of the vehicle
battery.
Ensure the ignition is switched off
before connecting or disconnecting
the vehicle battery.
The anti-theft alarm siren must be
deactivated as follows: Switch the ignition on then off, disconnect the
vehicle's battery within 15 seconds.
Vehicle battery discharge protection
3 140.
282IndexAAccessories and vehicle modifications .......................... 213
Active Emergency Braking .........185
Active head restraints ...................36
Adaptive cruise control .......116, 175
AdBlue ........................ 114, 158, 258
Adjustable air vents ...................147
Airbag and belt tensioners .........110
Airbag deactivation ..............57, 111
Airbag label................................... 53
Airbag system .............................. 53
Air conditioning regular operation ................................ 148
Air conditioning system .............. 142
Air intake .................................... 148
Air vents...................................... 147
Antilock brake system ................ 165
Antilock brake system (ABS) .....112
Anti-theft alarm system ................26
Anti-theft locking system .............. 25
Appearance care ........................253
Armrest ......................................... 41
Armrest storage ........................... 68
Ashtrays ..................................... 102
Automatic anti-dazzle ..................30
Automatic light control ...............132
Automatic locking ........................24
Automatic transmission .............161Autostop..................................... 153
Auxiliary heater ........................... 147
B Battery discharge protection ......140
Battery voltage ........................... 123
Bicycle rack .................................. 69
BlueInjection ............................... 158
Bonnet ....................................... 214
Brake and clutch fluid .................258
Brake and clutch system ...........111
Brake assist ............................... 167
Brake fluid .................................. 218 Brakes ............................... 165, 218
Breakdown.................................. 251
Bulb replacement ....................... 221
C Capacities .................................. 271
Cargo management system ........87
Car Pass ...................................... 20
Catalytic converter .....................157
Central locking system ................22
Centre console lighting ..............139
Centre console storage ...............68
Changing tyre and wheel size ...240
Charging system ........................ 111
Child locks ................................... 24
Child restraint installation locations ................................... 62
Child restraints.............................. 59