121 Left-hand side of the multifunction steering wheel: buttons for operating ACC.
First read and observe the introductoryinformation and safety warnings
Switching on ACC
Press the button.
The indicator lamp lights up grey, ACC does not regulate.
Starting control
Press the button while driving forwards.
ACC stores the current speed and maintains the set distance. If the current speed is outside the
defined speed range, ACC will set the minimum speed (when driving more slowly than the limit) or
maximum speed (when driving faster than the limit).
The following indicator lamps light up, depending on the driving situation:
ACC regulating.No vehicle has been detected ahead.Vehicle detected ahead (white).
Interrupting control
Briefly press the button or press the brake pedal.
The indicator lights up grey, the speed and distance remain stored.
Control is automatically interrupted if the traction control system (TCS) is deactivated.
Resuming control
Press the button.
ACC adopts the last set speed and last set distance. The instrument cluster display shows the set
speed and the indicator lamp lights up green.
Switching off ACC
Press and hold the button.
The set speed is deleted.
Changing to the speed limiter
Press the button.
ACC is switched off.
Setting ACC
Fig. 122 On the instrument cluster display: setting the distance (illustration, ACC regulating).
First read and observe the introductoryinformation and safety warnings
Setting the distance
You can set the distance in five steps from very small to very large:
Press the button and then the or button.
Alternatively, press the button as often as necessary until the desired distance is set.
The instrument cluster display shows the chosen distance setting Fig.
0lease observe any
country-specific requirements for the minimum distance.
You can set the distance which should be set at the start of control operation in the vehicle settings
of the Infotainment system Vehicle settings menu
If ACC is not regulating, the set distance and vehicle are not highlighted on the instrument cluster
display.
Setting the speed
You can adjust the stored speed within the defined speed range by means of the buttons on the
multifunction steering wheel:
+ 1 km/h (1 mph)- 1 km/h (1 mph)+ 10 km/h (5 mph)- 10 km/h (5 mph)
Press and hold the corresponding button to continuously change the stored speed.
Setting the control behaviour
Vehicles with driving profile selection: set the desired driving profile Driving profile selection
and 4MOTION Active Control
Vehicles without driving profile selection: set the desired gearbox programme in the vehicle
settings of the Infotainment system Vehicle settings menu
