184Driving and operating
Vehicle messages 3 121.
Forward collision alert The forward collision alert can help to
avoid or reduce the damage caused
by front-end crashes.
A vehicle ahead is indicated by a
control indicator A.
If a vehicle directly ahead is
approached too quickly, a warning
chime and alert in the Driver
Information Centre is provided.
A precondition is that forward collision
alert is activated in the vehicle
personalisation menu 3 127 or that it
is not deactivated by the button V
(depending on the system, see
following).
Depending on the vehicle's
equipment, there are two variants of
the forward collision alert available:
■ Forward collision alert based on
radar system
on vehicles equipped with adaptive cruise control 3 177.
■ Forward collision alert based on
front camera system
on vehicles with traditional cruise
control or none 3 174.
Forward collision alert based on radar system
The system uses the radar sensor
behind the radiator grille to detect a
vehicle directly ahead, in your path,
within a distance of max. 150 metres.
Activation
Forward collision alert operates
automatically above walking speed,
provided that Auto collision
preparation setting is not deactivated
in the vehicle personalisation menu
3 127.
Selecting the alert sensitivity
The alert sensitivity can be set to
near, medium or far.
Driving and operating185
Press button E; the current setting is
shown in the Driver Information
Centre. Press button E again to
change the alert sensitivity. The
setting is also displayed in the top line
of the Driver Information Centre.Note that the alert timing sensitivity
setting is shared with the following distance setting of the adaptive cruise control. So changing the alert timing
sensitivity changes the adaptive
cruise control following distance
setting.
Alerting the driver
A green illuminated vehicle ahead
control indicator A lights up in the
instrument cluster when the system has detected a vehicle in the driving
path. When the distance to a
preceding moving vehicle gets too
small or when approaching another
vehicle too rapidly and a collision is
imminent, the collision alert symbol
pops up in the Driver Information
Centre. Simultaneously a warning
chime sounds.
Depress the brake pedal, if it is
required by the situation.
238Vehicle care
No.Circuit15Engine control module16Starter17Transmission control module18Heated rear window19Front power windows20Rear power windows21Rear electrical centre22Left high beam (Halogen)23Headlamp washer system24Right low beam (Xenon)25Left low beam (Xenon)26Front fog lights27Diesel fuel heating28Stop-start system29Electric parking brake30ABS31Adaptive cruise controlNo.Circuit32Airbag33Adaptive forward lighting, auto‐
matic light control34Exhaust gas recirculation35Outside rear view mirror, rain
sensor36Climate control37Canister vent solenoid38Vacuum pump39Central control module40Windscreen washer, rear
window washer system41Right high beam (Halogen)42Radiator fan43Windscreen wiper44Windscreen wiper45Radiator fan46–No.Circuit47Horn48Radiator fan49Fuel pump50Headlamp levelling, adaptive
forward lighting51Air shutter52Auxiliary heater, diesel engine53Transmission control module,
engine control module54Vacuum pump, instrument
panel cluster, heating ventila‐
tion, air conditioning system
After having changed defective fuses
close the fuse box cover and press
until it engages.
If the fuse box cover is not closed
correctly, malfunction may occur.
Vehicle care239Instrument panel fuse box
In left-hand drive vehicles, the fuse
box is behind the storage
compartment in the instrument panel.
Open the compartment and push it to the left to unlock. Fold the
compartment down and remove it.
In right-hand drive vehicles, the fuse
box is located behind a cover in the
glovebox. Open the glovebox, then
open the cover and fold it down.
No.Circuit1Cruise control, speed limiter,
adaptive cruise control, steering wheel controls2Exterior lights, body control
module3Exterior lights, body control
module4Infotainment system5Infotainment system, instru‐
ment6Power outlet, cigarette lighter7Power outlet8Left low beam, body control
module9Right low beam, body control
module, airbag module10Door locks, body control module11Interior fan12–
292IndexAAccessories and vehicle modifications .......................... 218
Active Emergency Braking .........188
Active head restraints ...................37
Adaptive cruise control .......114, 177
Adaptive forward lighting ..........
................................ 114, 136, 229
AdBlue ........................ 112, 161, 266
Adjustable air vents ...................151
Airbag and belt tensioners .........109
Airbag deactivation ..............56, 109
Airbag system .............................. 54
Air conditioning regular operation ................................ 153
Air conditioning system .............. 146
Air intake .................................... 153
Air vents...................................... 151
Antilock brake system ................ 168
Antilock brake system (ABS) .....111
Anti-theft alarm system ................26
Anti-theft locking system .............. 26
Appearance care ........................261
Armrest ......................................... 42
Armrest storage ........................... 66
Ashtrays ..................................... 101
Automatic anti-dazzle ..................30
Automatic light control ...............134
Automatic locking ........................24Automatic transmission .............164
Auxiliary heater ........................... 151
B
Battery discharge protection ......144
Battery voltage ........................... 124
Bicycle rack .................................. 68
BlueInjection ............................... 161
Bonnet ....................................... 220
Brake and clutch fluid .................266
Brake and clutch system ...........110
Brake assist ............................... 170
Brake fluid .................................. 223
Brakes ............................... 168, 223
Breakdown.................................. 259
Bulb replacement ....................... 227
C Capacities .................................. 282
Cargo management system ........86
Car Pass ...................................... 20
Catalytic converter .....................161
Central locking system ................22
Centre console lighting ..............143
Centre console storage ...............67
Changing tyre and wheel size ...248
Charging system ........................ 109
Child locks ................................... 24
Child restraint installation locations ................................... 59
293
Child restraints.............................. 58
Child restraint systems ................58
Cigarette lighter .........................101
Climate control ............................. 16
Climate control systems .............145
Clock............................................. 99
Code ........................................... 121
Control indicators........................ 105
Control of the vehicle .................154
Controls ........................................ 94
Convex shape .............................. 29
Coolant and antifreeze ...............266
Cruise control ....................114, 174
Cupholders .................................. 64
Curtain airbag system .................. 56
Curve lighting.............................. 136
D Danger, Warnings and Cautions ...4
Daytime running lights ...............136
Declaration of conformity ............287
DEF ............................................ 161
Diesel exhaust fluid ....................161
Diesel fuel system bleeding .......226
Diesel particle filter .............112, 160
Door open .................................. 114
Door panel storage .......................65
Doors ............................................ 25
Driver assistance systems ..........174
Driver Information Centre ...........115Driving characteristics and
towing tips .............................. 213
Driving hints ................................ 154
E Electric adjustment ......................29
Electrical system......................... 235
Electric parking brake .........110, 169
Electric parking brake fault .........110
Electronic climate control system 147
Electronic driving programmes ..166
Electronic Stability Control.......... 172
Electronic Stability Control and Traction Control system ..........112
Electronic Stability Control off..... 112
End-of-life vehicle recovery .......219
Engine compartment fuse box ...237
Engine coolant ........................... 222
Engine coolant temperature gauge ..................................... 104
Engine data ............................... 273
Engine exhaust .......................... 160
Engine identification ...................269
Engine oil ................... 220, 266, 270
Engine oil pressure ....................113
Entry lighting .............................. 143
Event data recorders ..................289
Exit lighting ................................ 143
Exterior care .............................. 261
Exterior light ............................... 113Exterior lighting ....................13, 133
Exterior mirrors ............................. 29
F
Fault ........................................... 166
First aid kit ................................... 90
Fixed air vents ........................... 152
Flex-Fix system ............................ 68
Fog light ..................................... 114
Fog lights ................................... 230
Folding mirrors ............................. 29
Folding tray .................................. 90
Following distance indication ......187
Forward collision alert................. 184
Front airbag system .....................54
Front fog lights ........................... 140
Front seats.................................... 38
Front storage ................................ 65
Fuel............................................. 204
Fuel consumption - CO 2-
Emissions ............................... 212
Fuel for diesel engines ..............204
Fuel for liquid gas operation .......205
Fuel for natural gas operation ...204
Fuel for petrol engines ...............204
Fuel gauge ................................. 103
Fuel selector .............................. 103
Fuses ......................................... 235