Driving and operating189
Vehicle messages 3 123.
Forward collision alert The forward collision alert can help to
avoid or reduce the damage caused
by front-end crashes. If a vehicle
directly ahead is approached too
quickly, a warning chime and alert in
the Driver Information Centre is
provided.
The green illuminated vehicle ahead
symbol A appears in the
speedometer when the system has
detected a vehicle in the driving path. A precondition is that forward collision
alert is activated in the vehicle
personalisation menu 3 130 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 3 182.
■ Forward collision alert based on
front camera system
on vehicles with traditional cruise
control or none 3 179.
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 collisionpreparation setting is not deactivated
in the vehicle personalisation menu 3 130.
Selecting the alert sensitivity
The alert sensitivity can be set to
near, medium or far.
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.
190Driving and operating
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
When approaching another vehicle
too rapidly, the collision alert warning page will be indicated in the Driver
Information Centre. Simultaneously a
warning chime sounds. Depress the
brake pedal, if it is required by the situation.
SettingsSettings can be changed in the Auto
collision preparation menu in the
vehicle personalisation 3 130.
Forward collision alert based on
front camera system
Forward collision alert uses the front
camera system in the windscreen to
detect a vehicle directly ahead, in
your path, within a distance of approx.
60 metres.
Activation
Forward collision alert operates
automatically above 40 km/h, if it is
not deactivated by button V, see
below.
Selecting the alert sensitivity
The alert sensitivity can be set to
near, medium or far.
242Vehicle care
No.Circuit1Engine control module2Lambda sensor3Fuel injection, ignition system4Fuel injection, ignition system5–6Mirror heating, anti-theft alarm
system7Fan control, engine control
module, transmission control
module8Lambda sensor, engine cooling9Rear window sensor10Battery sensor11Trunk release12Adaptive forward lighting, auto‐
matic light control13ABS14Rear window wiperNo.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 control
244Vehicle care
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 fan12–13–No.Circuit14Diagnostic connector15Airbag16Power outlet17Air conditioning system18Logistics19Body control module20Body control module21Instrument panel cluster, anti-
theft alarm system22Ignition sensor23Body control module24Body control module25–26–
Load compartment fuse
box
The fuse box is on the left side of the
load compartment behind a cover.
292IndexAAccessories and vehicle modifications .......................... 223
Active Emergency Braking .........192
Active head restraints ...................38
Adaptive cruise control .......116, 182
Adaptive forward lighting ..........
................................ 116, 141, 233
AdBlue ........................ 114, 166, 269
Adjustable air vents ...................156
Advanced parking assist ............197
Airbag and belt tensioners .........111
Airbag deactivation ..............57, 111
Airbag system .............................. 55
Air conditioning regular operation ................................ 158
Air conditioning system .............. 151
Air intake .................................... 157
Air vents...................................... 156
Antilock brake system ................ 173
Antilock brake system (ABS) .....113
Anti-theft alarm system ................27
Anti-theft locking system .............. 27
Appearance care ........................264
Armrest ......................................... 44
Armrest storage ........................... 68
Ashtrays ..................................... 103
Automatic anti-dazzle ..................31
Automatic light control ...............139Automatic locking ........................25
Automatic transmission .............169
Auxiliary heater ........................... 156
B
Battery discharge protection ......149
Battery voltage ........................... 127
Bicycle rack .................................. 70
BlueInjection ............................... 166
Bonnet ....................................... 225
Brake and clutch fluid .................269
Brake and clutch system ...........112
Brake assist ............................... 175
Brake fluid .................................. 228
Brakes ............................... 173, 228
Breakdown.................................. 262
Bulb replacement ....................... 231
C
Capacities .................................. 284
Cargo management system ........88
Car Pass ...................................... 21
Catalytic converter .....................166
Central locking system ................23
Centre console lighting ..............148
Centre console storage ...............69
Changing tyre and wheel size ...251
Charging system ........................ 111
Child locks ................................... 25
293
Child restraint installationlocations ................................... 61
Child restraints.............................. 59
Child restraint systems ................59
Cigarette lighter .........................103
Climate control ............................. 17
Climate control systems .............150
Clock........................................... 101
Code ........................................... 123
Control indicators........................ 107
Control of the vehicle .................159
Controls ........................................ 96
Convex shape .............................. 30
Coolant and antifreeze ...............269
Cruise control ....................116, 179
Cupholders .................................. 66
Curtain airbag system .................. 57
Curve lighting.............................. 141
D Danger, Warnings and Cautions ...4
Daytime running lights ...............141
Declaration of conformity ............289
DEF ............................................ 166
Diesel exhaust fluid ....................166
Diesel fuel system bleeding .......230
Diesel particle filter .............114, 165
Door open .................................. 117
Door panel storage .......................67
Doors ............................................ 26Driver assistance systems..........179
Driver Information Centre ...........117
Driving characteristics and towing tips .............................. 218
Driving hints ................................ 159
E Electric adjustment ......................30
Electrical system......................... 240
Electric parking brake .................112
Electric parking brake fault .........112
Electronic climate control system 152
Electronic driving programmes ..171
Electronic Stability Control.......... 177
Electronic Stability Control and Traction Control system ..........114
Electronic Stability Control off..... 114
End-of-life vehicle recovery .......224
Engine compartment fuse box ...241
Engine coolant ........................... 227
Engine coolant temperature gauge ..................................... 106
Engine data ............................... 276
Engine exhaust .......................... 165
Engine identification ...................272
Engine oil ................... 225, 269, 273
Engine oil pressure ....................115
Entry lighting .............................. 148
Event data recorders ..................289
Exit lighting ................................ 148Exterior care .............................. 264
Exterior light ............................... 116
Exterior lighting ....................14, 138
Exterior mirrors ............................. 30
F
Fault ........................................... 171
First aid kit ................................... 92
Fixed air vents ........................... 157
Flex-Fix system ............................ 70
Fog light ..................................... 116
Fog lights ................................... 235
Folding mirrors ............................. 30
Folding tray .................................. 92
Following distance indication ......192
Forward collision alert................. 189
Front airbag system .....................55
Front fog lights ........................... 145
Front seats.................................... 39
Front storage ................................ 67
Fuel............................................. 209
Fuel consumption - CO 2-
Emissions ............................... 217
Fuel for diesel engines ..............209
Fuel for liquid gas operation .......210
Fuel for natural gas operation ...209
Fuel for petrol engines ...............209
Fuel gauge ................................. 105
Fuel selector .............................. 105
Fuses ......................................... 240