188Driving and operating
The selected following distance is
indicated by filled distance bars in the
adaptive cruise control page.
Note that the following distance
setting is shared with the sensitivity
setting of forward collision alert
3 192.
Example: If setting 3 (far) is selected,
then the driver is warned sooner
before a possible collision, also if
adaptive cruise control is inactive or
switched off.
9 Warning
The driver accepts full
responsibility for the appropriate
following distance based on traffic, weather and visibility conditions.
Following distance must be
adjusted or the system switched
off when required by the prevailing
conditions.
Detecting the vehicle ahead
The green illuminated vehicle ahead
control indicator A is displayed when
the system detects a vehicle in the driving path.
Forward collision alert 3 192.
If this symbol does not display, or displays only briefly, adaptive cruise
control will not respond to vehicles
ahead.
Deactivation
Adaptive cruise control is deactivated by 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 accelerates above
190 km/h or slows down below
15 km/h (on vehicles with
automatic transmission it slows
down to a stop without
deactivating within two minutes).
● The Traction Control system is operating.
● The Electronic Stability Control is
operating.
● There is no traffic and nothing detected on the road sides for
several minutes. In this case
there are no radar echoes and
the sensor may report that it is blocked.
Driving and operating189● The collision imminent brakingsystem is applying the brakes.
● The radar sensor is blocked by an ice or water film.
● A fault is detected in the radar, engine or brake system.
Additionally, the system is
automatically deactivated on vehicles
with automatic transmission (full
speed range adaptive cruise control)
when:
● The electric parking brake is applied.
● The vehicle is being held to a stop
by the system for more than
two minutes.
● The vehicle stops, the driver's seat belt is released and the
driver's door is opened.
When adaptive cruise control is
deactivated, the control indicator m
and C in the Driver Information
Centre changes from green to white
and a pop-up message is displayed.
The stored speed is maintained. The
system is deactivated but not
switched off.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 or C
extinguishes. The stored speed is
deleted.
Switching off the ignition also
switches off adaptive cruise control
and deletes the stored speed.
Driver's attention ● Use adaptive cruise control carefully on bends or mountain
roads, as it can lose the vehicle
ahead and need 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 of the vehicle.
● 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 suppresses completely 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 to
detect 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.
321Charging system ........................ 105
Child locks ................................... 29
Child restraint installation locations ................................... 66
Child restraints.............................. 64
Child restraint systems ................64
Climate control ............................. 16
Climate control systems .............141
Clock............................................. 90
Collision damage repair ..............316
Colour-Info-Display .....................118
Control indicators........................ 104
Control of the vehicle .................156
Controls ........................................ 86
Convex shape .............................. 38
Coolant and antifreeze ...............276
Cruise control ....................110, 181
Cupholders .................................. 70
Curtain airbag system .................. 62
Curve lighting.............................. 133
D Danger, Warnings and Cautions ...4
Daytime running lights ...............132
Declaration of conformity ............313
DEF ............................................ 165
Diesel exhaust fluid ....................165
Diesel fuel system bleeding .......235
Diesel particle filter .............108, 164
Door open .................................. 111Doors............................................ 30
Driver assistance systems ..........181
Driver Information Centre ...........111
Driving characteristics and towing tips .............................. 222
Driving hints ................................ 156
Dual automatic climate control system ..................................... 148
E Electric adjustment ......................38
Electrical system......................... 246
Electric parking brake .........106, 175
Electric parking brake fault .........106
Electronic driving programmes ..171
Electronic key system ...................23
Electronic Stability Control.......... 177
Electronic Stability Control and Traction Control system ..........108
Electronic Stability Control off..... 108
End-of-life vehicle recovery .......228
Engine compartment fuse box ...248
Engine coolant ........................... 231
Engine coolant temperature ......108
Engine coolant temperature gauge ..................................... 102
Engine data ............................... 284
Engine exhaust .......................... 164
Engine identification ...................280
Engine oil ................... 229, 276, 281Engine oil pressure ....................109
Entry lighting .............................. 139
Event data recorders ..................318
Exit lighting ................................ 139
Exterior care .............................. 272
Exterior light ............................... 110
Exterior lighting ....................13, 129
Exterior mirrors ............................. 38
F
Fault ........................................... 172
First aid ......................................... 81
First aid kit ................................... 81
Fixed air vents ........................... 153
Fog light ..................................... 110
Fog lights ................................... 241
Folding mirrors ............................. 38
Following distance ......................107
Following distance indication ......195
Forward collision alert................. 192
Front airbag system .....................61
Front fog lights ........................... 136
Front seats.................................... 48
Front storage ................................ 71
Front turn signal light ..................237
Fuel............................................. 214
Fuel consumption - CO 2-
Emissions ............................... 221
Fuel for diesel engines ..............215
Fuel for liquid gas operation .......215
324Top-tether fastening eyes ............69
Tow bar....................................... 222
Towing ................................ 222, 268
Towing another vehicle .............270
Towing equipment .....................223
Towing the vehicle .....................268
Traction Control system ............. 177 Traction Control system off......... 108
Traffic sign assistant ...........111, 209
Trailer coupling ........................... 222
Trailer stability assist .................225
Trailer towing ............................. 223
Transmission ............................... 17
Transmission display .................168
Tread depth ............................... 257
Trip odometer ............................ 100
Turn and lane-change signals ...135
Turn signal ................................. 104
Tyre chains ................................ 259
Tyre designations ......................254
Tyre pressure ............................ 254
Tyre pressure monitoring system ............................. 109, 256
Tyre pressures ........................... 295
Tyre repair kit ............................. 259
U Ultrasonic parking assist ...107, 197
Upholstery .................................. 274
Uplevel display ........................... 111Upshift........................................ 107
Using this manual ..........................3
V Valet mode ................................. 118
Variable effort steering ...............107
Vehicle battery ........................... 233
Vehicle checks............................ 228
Vehicle data ................................ 281
Vehicle data recording and privacy ..................................... 318
Vehicle detected ahead ..............110
Vehicle dimensions .................... 292
Vehicle Identification Number ....279
Vehicle jack ................................ 253
Vehicle messages .....................120
Vehicle personalisation .............121
Vehicle security ............................ 34
Vehicle specific data ......................3
Vehicle storage ........................... 227
Vehicle tools ............................... 253
Vehicle unlocking ........................... 6 Vehicle weight ........................... 289
Ventilating ..................................... 54
Ventilation ................................... 141
W
Warning chimes .........................120
Warning lights ............................. 100
Warning triangle .......................... 81
Washer and wiper systems .........14Washer fluid ............................... 232
Wheel changing .........................262
Wheel covers ............................. 258
Wheels and tyres .......................254
Windows ....................................... 40
Windscreen................................... 40
Windscreen wiper/washer ...........87
Winter tyres ............................... 254
Wiper blade replacement ..........235
X
Xenon headlights .......................239