Driving and operating187cruise control may not be able to
brake the vehicle in time to avoid a
collision with a much slower vehicle or
after a lane change. This is
particularly true if driving fast or if the
visibility is reduced due to weather
conditions.
While entering or exiting a motorway, adaptive cruise control may lose the
vehicle ahead and accelerate up to
the set speed. For this reason,
decrease the set speed before the
exit or before the entry.
Vehicle path changes
If another vehicle enters your driving
path, adaptive cruise control will first
consider the vehicle when it is
completely in your path. Be ready to
take action and depress the brake
pedal, if you need to brake more
quickly.
Hill and trailer considerations
System performance on hills and
when towing a trailer depends on
vehicle speed, vehicle load, traffic
conditions and the road gradient. It
may not detect a vehicle in your path
while driving on hills. On steep hills,
you may have to use the accelerator
pedal to maintain your vehicle speed.
When going downhill, especially
when towing a trailer, you may have
to brake to maintain or reduce your
speed.
Note that applying the brake
deactivates the system. It is not
recommended to use adaptive cruise
control on steep hills especially when towing a trailer.
Radar unit
The radar unit is mounted behind the
radiator grille below the brand
emblem.
9 Warning
The radar unit was aligned
carefully during manufacture.
Therefore, after a frontal accident, do not use the system. The front
bumper may appear to be intact,
however the sensor behind can be
out of position and react
incorrectly. After an accident,
188Driving and operatingconsult a workshop to verify and
correct the adaptive cruise control sensor position.
Settings
Settings can be changed in the Auto
collision preparation menu in the
vehicle personalisation 3 129.
Fault
If the adaptive cruise control does not work due to temporary conditions
(e.g. blockage by ice) or if there is a
permanent system error, then a
message is displayed in the Driver
Information Centre.
Vehicle messages 3 122.
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 3 129 or that it
is not deactivated by pressing 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
Driving and operating189on vehicles equipped with
adaptive cruise control 3 181.
● 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 collision
preparation setting is not deactivated
in the vehicle personalisation menu
3 129.
Selecting the alert sensitivity
The alert sensitivity can be set to
near, medium or far.
Press E; the current setting is shown
in the Driver Information Centre.
Press 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.
Vehicle care241No.Circuit1Engine control module2Lambda sensor3Fuel injection/Ignition system4Fuel injection/Ignition system5–6Exterior mirror heating/Anti-
theft alarm system7Fan control/Engine control
module/Transmission control
module8Lambda sensor/Engine cooling9Rear window sensor10Battery sensor11Tailgate release12Adaptive forward lighting/Auto‐
matic light control13ABS14Rear window wiper15Engine control moduleNo.Circuit16Starter17Transmission 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 control32Airbag
Vehicle care243
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/Instrument6Power outlet/Cigarette lighter7Power outlet8Left low beam/Body control
module9Right low beam/Body control
module/Airbag module10Door locks/Body control module11Interior fan12–13–14Diagnostic connectorNo.Circuit15Airbag16Power 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.
298IndexAAccessories and vehicle modifications .......................... 223
Active Emergency Braking .........192
Active head restraints ...................37
Adaptive cruise control .......116, 181
Adaptive forward lighting ..115,
142, 233
AdBlue ........................ 114, 165, 270
Adjustable air vents ...................156
Airbag and belt tensioners .........110
Airbag deactivation ..............58, 111
Airbag label................................... 54
Airbag system .............................. 54
Air conditioning regular operation ................................ 157
Air conditioning system .............. 151
Air intake .................................... 157
Air vents...................................... 156
Antilock brake system ................ 172
Antilock brake system (ABS) .....112
Anti-theft alarm system ................26
Anti-theft locking system .............. 26
Appearance care ........................264
Armrest ......................................... 42
Armrest storage ........................... 69
Ashtrays ..................................... 103
Automatic anti-dazzle ..................30
Automatic light control ...............139
Automatic locking ........................24Automatic transmission .............169
Auxiliary heater ........................... 156
B Battery discharge protection ......149
Battery voltage ........................... 126
Bicycle rack .................................. 70
BlueInjection ............................... 165
Bonnet ....................................... 224
Brake and clutch fluid .................270
Brake and clutch system ...........111
Brake assist ............................... 175
Brake fluid .................................. 228
Brakes ............................... 172, 228
Breakdown.................................. 262
Bulb replacement ....................... 231
C
Capacities .................................. 286
Cargo management system ........88
Car Pass ...................................... 20
Catalytic converter .....................165
Central locking system ................21
Centre console lighting ..............148
Centre console storage ...............70
Changing tyre and wheel size ...251
Charging system ........................ 111
Child locks ................................... 24
Child restraint installation locations ................................... 62
Child restraints.............................. 60
299Child restraint systems ................60
Cigarette lighter .........................103
Climate control ............................. 15
Climate control systems .............150
Clock........................................... 101
Code ........................................... 122
Control indicators........................ 107
Control of the vehicle .................159
Controls ........................................ 97
Convex shape .............................. 28
Coolant and antifreeze ...............270
Cruise control ....................116, 179
Cupholders .................................. 67
Curtain airbag system .................. 58
Curve lighting.............................. 142
D Danger, Warnings and Cautions ...4
Daytime running lights ...............142
Declaration of conformity ............292
DEF ............................................ 165
Diesel exhaust fluid ....................165
Diesel fuel system bleeding .......230
Diesel particle filter .............114, 164
Door open .................................. 116
Door panel storage .......................68
Doors ............................................ 25
Driver assistance systems ..........179
Driver Information Centre ...........116Driving characteristics and
towing tips .............................. 218
Driving hints ................................ 159
E Electric adjustment ......................28
Electrical system......................... 239
Electric parking brake .........112, 173
Electric parking brake fault .........112
Electronic climate control system 152
Electronic driving programmes ..170
Electronic Stability Control.......... 176
Electronic Stability Control and Traction Control system ..........113
Electronic Stability Control off..... 113
End-of-life vehicle recovery .......223
Engine compartment fuse box ...240
Engine coolant ........................... 226
Engine coolant temperature gauge ..................................... 106
Engine data ............................... 277
Engine exhaust .......................... 164
Engine identification ...................273
Engine oil ................... 225, 270, 274
Engine oil pressure ....................114
Entry lighting .............................. 148
Event data recorders ..................296
Exit lighting ................................ 149
Exterior care .............................. 264
Exterior light ............................... 115Exterior lighting ....................12, 138
Exterior mirrors ............................. 28
F
Fault ........................................... 171
First aid kit ................................... 92
Fixed air vents ........................... 157
Flex-Fix system ............................ 70
Fog light ..................................... 116
Fog lights ................................... 234
Folding mirrors ............................. 29
Folding tray .................................. 92
Following distance indication ......192
Forward collision alert................. 188
Front airbag system .....................57
Front fog lights ........................... 146
Front seats.................................... 38
Front storage ................................ 68
Fuel............................................. 208
Fuel consumption - CO 2-
Emissions ............................... 216
Fuel for diesel engines ..............208
Fuel for liquid gas operation .......209
Fuel for natural gas operation ...209
Fuel for petrol engines ...............208
Fuel gauge ................................. 105
Fuel selector .............................. 105
Fuses ......................................... 239