Fig. 169 Left-hand side of the multifunction steering wheel: buttons for operating the Adaptive Cruise Control (ACC)
When the Adaptive Cruise Control (ACC) is switched on,
the green indicator lamp in the instrument cluster
lights up, and the speed memory and the status of the Adaptive Cruise Control are
shown in the display .
Conditions for starting the Adaptive Cruise Control
Controlling speed
When switched on, the speed can be stored and set. The stored speed can vary from the speed actually being driven if the distance is being actively controlled.
Function | Button on the multifunction steering wheel | Action |
---|---|---|
Switching on the ACC. | Press the ![]() |
The system is switched on. No speed has yet been stored and the speed is not yet being controlled. |
Switching between the ACC and the speed limiter. | Press the ![]() |
This switches between the CCS and the speed limiter . |
Activating the ACC. | Press the ![]() ![]() ![]() |
Current speed is stored and controlled. If ACC is already active: Press briefly: reduce speed by 1 km/h (1 mph) and store. Press and hold: the stored speed is reduced continuously in steps of 1 km/h (1 mph) for as long as the button is pressed. A reduction in speed is achieved by accelerator release or automatic braking. |
Switching off ACC temporarily. | Press the ![]() OR: depress the brake pedal. OR: depress the clutch pedal for longer than 30 seconds. |
Control is switched off temporarily. The speed is stored in the memory. |
Resuming ACC control. | Press the ![]() ![]() ![]() |
The stored speed is reactivated and controlled. If no speed has been stored yet, the ACC records and controls the actual speed. If ACC is already active: Press briefly: increase speed by 1 km/h (1 mph) and store. Press and hold: the stored speed is increased continuously in steps of 1 km/h (1 mph) for as long as the button is pressed. |
Accelerating (during ACC control). | Press the ![]() |
Press briefly: increase speed in increments of
10 km/h (5 mph) and store. Press and hold: the stored speed will be increased in steps of 10 km/h (5 mph) for as long as the button is pressed. |
Decelerating (during ACC control). | Press the ![]() |
Press briefly: reduce speed in increments of
10 km/h (5 mph) and store. Press and hold: the stored speed will be reduced in steps of 10 km/h (5 mph) for as long as the button is pressed. A reduction in speed is achieved by accelerator release or automatic braking. |
Switching off the ACC. | Press the ![]() |
The system is switched off. The stored speed will be deleted. |
The mph figures given in brackets in the table relate exclusively to instrument clusters with mile readings.
Stop-and-go traffic and the vehicle automatically pulling away
If the ACC ready for start driver message is displayed in the instrument cluster
and the vehicle ahead starts to move, the vehicle will also pull away. ACC ready
for start can be reactivated or extended by pressing the
button . It is displayed for approximately 3 seconds.
If ACC ready for start is no longer displayed, the vehicle will not start automatically,
e.g. with active start/stop system. If the vehicle ahead has already moved on, you
can pull off by pressing the
button or by depressing
the accelerator briefly. The ACC then continues regulating.
Automatic pulling away is not available for all vehicles and countries.
Setting the distance level
The speed-dependent distance from the vehicle in front can be set to one of 5 levels in the infotainment system .
In wet road conditions, you should always set a larger distance than when driving in dry road conditions.
The following distances can be pre-selected:
The distance level to the vehicle ahead is set using the
button on the multifunction steering wheel . The
ACC display appears when the button is pressed . To set the distance level, press
the
button.
When the highest level is reached, the distance returns to the lowest level when the button is pressed again.
The distance level can also be set using the or
buttons on the multifunction steering wheel immediately
after the
button on the multifunction steering wheel
has been pressed.
The
button and the
and
Driver assistance function buttons in the infotainment system can be used to set
the distance level that should be selected when the ACC is switched on .
Setting the driving programme
In vehicles with Driving Mode Selection, the selected driving mode (Driving Mode Selection) can affect the acceleration response .
The following driving modes can be selected:
In vehicles without Driving Mode Selection, the acceleration response can be
affected by the driving mode selected by pressing the
button and the
and
Driver assistance function buttons in the infotainment system .
The following conditions can prevent the Adaptive Cruise Control (ACC) from reacting:
WARNING
The set speed will be deleted if the ignition or the ACC is switched off.
The ACC is automatically deactivated when the traction control system (TCS) is deactivated.
In vehicles with a start/stop system, the engine is switched off automatically during the stationary phase of ACC and is then restarted for moving off.
Removing and installing trailer detector control unit -J345-
Note
When renewing the control unit, select
Renew function for the respective control unit in
Guided fault finding or
Guided functions mode
→ Vehicle
diagnostic tester.
Removing
...
Assembly overview – special add-on parts, “R”
1 -
Front bumper cover
“R”
→ Chapter
2 -
Emblems on radiator grille
“R”
→ Chapter
3 -
Rear lettering
“R”
→ Chapter
4 -
R ...
Overview of fitting locations – lights in roof trim
1 -
Driver side illuminated vanity mirror -W20-
In the case of vanity mirrors with LED lighting, the entire light
must be renewed in the event of a fault.
Removing and installing
→ Chapter
2 -
...