Page 189 of 317

Driving and operating187Reduce speedWith cruise control active, hold thumb
wheel turned to SET/- or briefly turn to
SET/- repeatedly: speed decreases
continuously or in small increments.
Deactivation of the functionality
Press y; control indicator m in
instrument cluster illuminates white.
On Uplevel display m changes to
white.
Cruise control is deactivated, but not
switched off. Last stored speed
remains in memory for later speed
resume.
Automatic deactivation: ● Vehicle speed is below approx. 30 km/h.
● Vehicle speed drops more than 25 km/h below the set speed.
● The brake pedal is depressed.
● The clutch pedal is depressed for
a few seconds.
● The selector lever is in N.
● Engine speed is in a very low range.● The Traction Control system orElectronic Stability Control is
operating.
● Parking brake is applied.
● Simultaneous pressing RES/+
and brake pedal deactivates
cruise control and will delete
stored speed.
Resume stored speed
Turn thumb wheel to RES/+ at a
speed above 30 km/h. The stored
speed will be obtained.
Switching off the system
Press m, control indicator m in
instrument cluster extinguishes. The
stored speed is deleted.
Pressing L to activate the speed
limiter or switching off the ignition also switches off cruise control and
deletes the stored speed.
Speed limiter
The speed limiter prevents the
vehicle exceeding a preset maximum speed.The maximum speed can be set at
speeds above 25 km/h up to
200 km/h.
The driver can only accelerate up to
the preset speed. Deviations from the
limited speed may occur when driving
downhill.
The preset speed limit is displayed in
the Driver Information Centre when
the system is active.
Activation of the functionality
Illustrations show different versions.
Page 195 of 317

Driving and operating193If this symbol does not display, or
displays briefly, adaptive cruise
control will not respond to vehicles
ahead.
Deactivation of the functionality Adaptive cruise control is deactivatedby the driver when:
● y is pressed.
● Brake pedal is applied.
● Clutch pedal is depressed for more than four seconds.
● 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
55 km/h Vehicles with automatic
transmission slows down to a
stop without deactivating within
five minutes.
● The Traction Control system is deactivated or operating.
● The Electronic Stability Control is
deactivated or operating.● There is no traffic and nothing detected on the road sides forapprox. one minute. In this casethere are no radar echoes and
the sensor may report that it is
blocked.
● The active emergency braking system is applying the brakes.
● Driving on steep inclines.
● The radar sensor is blocked by an ice or water film.
● A fault is detected in the radar, camera, engine or brake system.
● The brakes need to cool down.
Additionally, the system is
automatically deactivated on vehicles
with automatic transmission (full
speed range adaptive cruise control)
when:
● The incline uphill or downhill is greater than 20%.
● The electric parking brake is applied.●The vehicle is being held to a stop
by the system for more than
five minutes.
● The vehicle stops, the driver's seat belt is unbuckled and thedriver's door is opened.
When adaptive cruise control is
deactivated, the control indicator m
changes from green to white and a
pop-up message is displayed in the
Driver Information Centre.
The stored speed is maintained.
On Midlevel display, the stored speed is indicated in brackets in the Driver
Information Centre when the system
is deactivated but not switched off.
On Uplevel display, the adaptive
cruise control symbol C changes
from green to white when the system
is deactivated but not switched off.
Page 238 of 317
236Vehicle careWasher fluid
Fill with clean water mixed with a
suitable quantity of approved
windscreen washer fluid which
contains antifreeze.
Caution
Only washer fluid with a sufficient
antifreeze concentration provides
protection at low temperatures or
a sudden drop in temperature.
Washer fluid 3 281.
Brakes
In the event of minimum thickness of
the brake lining, a squealing noise
sounds during braking.
Continued driving is possible but
have the brake lining replaced as
soon as possible.
Once new brake linings are installed,
do not brake unnecessarily hard for
the first few journeys.
Brake fluid9 Warning
Brake fluid is poisonous and
corrosive. Avoid contact with eyes, skin, fabrics and painted surfaces.
The brake fluid level must be betweenthe MIN and MAX marks.
If fluid level is below MIN seek the
assistance of a workshop.
Brake and clutch fluid 3 281.
Page 285 of 317
Service and maintenance283Washer fluidUse only washer fluid approved for
the vehicle to prevent damage of
wiper blades, paintwork, plastic and
rubber parts. Consult a workshop.
Brake and clutch fluid Over time, brake fluid absorbs
moisture which will reduce braking
effectiveness. The brake fluid should
therefore be replaced at the specified
interval.
Page 312 of 317

310IndexAAccessories and vehicle modifications .......................... 231
Active emergency braking ..........200
Adaptive cruise control .......115, 189
AdBlue ................................ 113, 169
Adjustable air vents ...................155
Airbag and belt tensioners .........110
Airbag deactivation ..............63, 110
Airbag label................................... 58
Airbag system .............................. 58
Air conditioning regular operation ................................ 156
Air conditioning system .............. 148
Air intake .................................... 156
Air vents...................................... 155
Antilock brake system ................ 179
Antilock brake system (ABS) .....112
Anti-theft alarm system ................36
Anti-theft locking system .............. 36
Appearance care ........................277
Armrest ................................... 53, 55
Armrest storage ........................... 72
Ashtrays ..................................... 100
Automatic anti-dazzle ..................41
Automatic light control ...............137
Automatic locking ........................29
Automatic transmission .............172
Autostop ..................................... 163
Auxiliary heater ........................... 155B
Battery discharge protection ......146
Battery voltage ........................... 125 Belts.............................................. 56
BlueInjection ............................... 169
Bonnet ....................................... 233
Brake and clutch fluid .................281
Brake and clutch system ...........111
Brake assist ............................... 182
Brake fluid .................................. 236
Brakes ............................... 179, 236
Breakdown.................................. 275
Bulb replacement ....................... 239
C Capacities .................................. 296
Cargo management system ........82
Catalytic converter .....................169
Central locking system ................24
Centre console lighting ..............145
Changing tyre and wheel size ...264
Charging system ........................ 111 Child locks ................................... 30
Child restraint installation locations ................................... 67
Child restraints.............................. 65
Child restraint systems ................65
Climate control ............................. 16
Climate control systems .............147
Clock............................................. 95
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