Driving and operating183
Vehicle messages 3 120.
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 3 126 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 3 176.
■ Forward collision alert based on
front camera system
on vehicles with traditional cruise
control or none 3 173.
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
3 126.
Selecting the alert sensitivity
The alert sensitivity can be set to
near, medium or far.
184Driving and operating
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.
Vehicle care237
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.
238Vehicle careInstrument 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–
290IndexAAccessories and vehicle modifications .......................... 217
Active Emergency Braking .........187
Active head restraints ...................36
Adaptive cruise control .......113, 176
Adaptive forward lighting ..........
................................ 113, 135, 228
AdBlue ........................ 111, 160, 265
Adjustable air vents ...................150
Airbag and belt tensioners .........108
Airbag deactivation ..............55, 108
Airbag system .............................. 53
Air conditioning regular operation ................................ 152
Air conditioning system .............. 145
Air intake .................................... 152
Air vents...................................... 150
Antilock brake system ................ 167
Antilock brake system (ABS) .....110
Anti-theft alarm system ................25
Anti-theft locking system .............. 25
Appearance care ........................260
Armrest ......................................... 41
Armrest storage ........................... 65
Ashtrays ..................................... 100
Automatic anti-dazzle ..................29
Automatic light control ...............133
Automatic locking ........................23Automatic transmission .............163
Auxiliary heater ........................... 150
B
Battery discharge protection ......143
Battery voltage ........................... 123
Bicycle rack .................................. 67
BlueInjection ............................... 160
Bonnet ....................................... 219
Brake and clutch fluid .................265
Brake and clutch system ...........109
Brake assist ............................... 169
Brake fluid .................................. 222
Brakes ............................... 167, 222
Breakdown.................................. 258
Bulb replacement ....................... 226
C Capacities .................................. 281
Cargo management system ........85
Car Pass ...................................... 19
Catalytic converter .....................160
Central locking system ................21
Centre console lighting ..............142
Centre console storage ...............66
Changing tyre and wheel size ...247
Charging system ........................ 108
Child locks ................................... 23
Child restraint installation locations ................................... 58
291
Child restraints.............................. 57
Child restraint systems ................57
Cigarette lighter .........................100
Climate control ............................. 15
Climate control systems .............144
Clock............................................. 98
Code ........................................... 120
Control indicators........................ 104
Control of the vehicle .................153
Controls ........................................ 93
Convex shape .............................. 28
Coolant and antifreeze ...............265
Cruise control ....................113, 173
Cupholders .................................. 63
Curtain airbag system .................. 55
Curve lighting.............................. 135
D Danger, Warnings and Cautions ...4
Daytime running lights ...............135
Declaration of conformity ............286
DEF ............................................ 160
Diesel exhaust fluid ....................160
Diesel fuel system bleeding .......225
Diesel particle filter .............111, 159
Door open .................................. 113
Door panel storage .......................64
Doors ............................................ 24
Driver assistance systems ..........173
Driver Information Centre ...........114Driving characteristics and
towing tips .............................. 212
Driving hints ................................ 153
E Electric adjustment ......................28
Electrical system......................... 234
Electric parking brake .........109, 168
Electric parking brake fault .........109
Electronic climate control system 146
Electronic driving programmes ..165
Electronic Stability Control.......... 171
Electronic Stability Control and Traction Control system ..........111
Electronic Stability Control off..... 111
End-of-life vehicle recovery .......218
Engine compartment fuse box ...236
Engine coolant ........................... 221
Engine coolant temperature gauge ..................................... 103
Engine data ............................... 272
Engine exhaust .......................... 159
Engine identification ...................268
Engine oil ................... 219, 265, 269
Engine oil pressure ....................112
Entry lighting .............................. 142
Event data recorders ..................288
Exit lighting ................................ 142
Exterior care .............................. 260
Exterior light ............................... 112Exterior lighting ....................12, 132
Exterior mirrors ............................. 28
F
Fault ........................................... 165
First aid kit ................................... 89
Fixed air vents ........................... 151
Flex-Fix system ............................ 67
Fog light ..................................... 113
Fog lights ................................... 229
Folding mirrors ............................. 28
Folding tray .................................. 89
Following distance indication ......186
Forward collision alert................. 183
Front airbag system .....................53
Front fog lights ........................... 139
Front seats.................................... 37
Front storage ................................ 64
Fuel............................................. 203
Fuel consumption - CO 2-
Emissions ............................... 211
Fuel for diesel engines ..............203
Fuel for liquid gas operation .......204
Fuel for natural gas operation ...203
Fuel for petrol engines ...............203
Fuel gauge ................................. 102
Fuel selector .............................. 102
Fuses ......................................... 234