Driving and operating185The green illuminated "vehicle
ahead" control indicator A is
displayed in the speedometer when
the system detects a vehicle in the driving path.
If this symbol does not appear, or
appears briefly, adaptive cruise
control will not respond to vehicles
ahead.
Deactivation Adaptive cruise control is deactivatedby the driver when:
● y is pressed.
● Brake pedal is applied.
● Clutch pedal is depressed for more than four seconds.
● Gear selector lever of automatic transmission is moved to N.
The system is also automatically
deactivated when:
● Vehicle speed slows down below
28 mph or accelerates above
120 mph.
● Traction Control system is operating for more than
20 seconds.● Electronic Stability Control is operating.
● There is no traffic and nothing detected on the road sides forseveral minutes. In this casethere are no radar echoes and
the sensor may report that it is
blocked.
● Collision imminent braking system is applying the brakes.
● Radar sensor is blocked by an ice
or water film.
● A fault is detected in the radar, engine or brake system.
When adaptive cruise control is
deactivated automatically, the control indicator m illuminates white and a
warning symbol is displayed as a pop-
up in the Driver Information Centre.
The stored speed is maintained.
9 Warning
When adaptive cruise control is
deactivated, the driver must take
over full brake and engine control.
Switching off
Press C to switch off adaptive cruise
control. The control indicator m
extinguishes. The stored speed is
deleted.
Switching off the ignition also
switches off adaptive cruise control
and deletes the stored speed.
186Driving and operatingDriver's attention● Use adaptive cruise control carefully on bends or mountain
roads, as it can lose the vehicle
ahead and require time to detect
it again.
● Do not use the system on slippery roads as it can create
rapid changes in tyre traction
(wheel spinning), so that you
could lose control.
● Do not use adaptive cruise control during rain, snow or
heavy dirt, as the radar sensor
can be covered by a water film,
dust, ice or snow. This reduces or completely suppresses the
visibility. In case of sensor
blockage, clean the sensor
cover.
System limits ● The system's automatic brake force does not permit hard
braking and the braking level
may not be sufficient to avoid a
collision.● After a sudden lane change, the system needs a certain time todetect the next preceding
vehicle. So if a new vehicle is
detected, the system may
accelerate instead of braking.
● Adaptive cruise control does ignore the oncoming traffic.
● Adaptive cruise control does not brake for stopped vehicles,
pedestrians or animals.
Bends
The adaptive cruise control calculates
a predicted path based on the
centrifugal force. This predicted path
considers the current bend
characteristic, but cannot consider a
future bend change. The system may lose the current vehicle ahead or
consider a vehicle which is not in the
actual lane. This can happen when
entering or exiting a bend or if the
bend gets stronger or weaker. If it no
longer detects any vehicle ahead,
then control indicator A will
extinguish.
If the centrifugal force is too high in a bend, the system slows down the vehicle slightly. This braking level is
not designed to avoid spinning off the bend. The driver is responsible for
reducing the selected speed before
entering a bend and in general to
adapt the speed to the road type and
to existing speed limits.
Motorways
On motorways, adapt the set speed
to the situation and the weather.
Always consider that adaptive cruise
control has a limited visibility range, a
limited braking level and a certain
reaction time to verify if a vehicle is in
the driving path or not. Adaptive
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
302Towing equipment .....................219
Towing the vehicle .....................262
Traction Control system ............. 175
Traction Control system off......... 114
Traffic sign assistant ...................204
Trailer coupling ........................... 217
Trailer stability assist .................221
Trailer towing ............................. 218
Transmission ............................... 16
Transmission display .................169
Tread depth ............................... 250
Trip computer ............................ 126
Trip odometer ............................ 104
Turn and lane-change signals ...145
Turn signal ................................. 110
Tyre chains ................................ 251
Tyre designations ......................246
Tyre pressure ............................ 246
Tyre pressure monitoring system ............................. 114, 247
Tyre pressures ........................... 288
Tyre repair kit ............................. 252
U Ultrasonic parking assist ...113, 194
Underseat storage .......................68
Upholstery .................................. 266
Upshift ........................................ 113
Using this manual ..........................3V
Vehicle battery ........................... 228
Vehicle checks............................ 224
Vehicle data ................................ 274
Vehicle data recording and privacy ..................................... 296
Vehicle detected ahead ..............116
Vehicle dimensions .................... 285
Vehicle Identification Number ....272
Vehicle jack ................................ 245
Vehicle messages .....................122
Vehicle personalisation .............129
Vehicle security ............................ 26
Vehicle specific data ......................3
Vehicle storage ........................... 223
Vehicle tools ............................... 245
Vehicle unlocking ........................... 6 Vehicle weight ........................... 283
Ventilation ................................... 150
W
Warning chimes .........................125
Warning lights ............................. 104
Warning triangle .......................... 92
Washer and wiper systems .........14
Washer fluid ............................... 228
Wheel changing .........................254
Wheel covers ............................. 251
Wheels and tyres .......................246
Windows ....................................... 30Windscreen................................... 30
Windscreen wiper/washer ...........98
Winter tyres ............................... 246
Wiper blade replacement ..........230