Fig. 169 Left-hand side of the multifunction steering wheel: buttons for operating the Adaptive Cruise Control (ACC)
First read and observe the introductory information and safety warningsWhen 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 button on
the multifunction steering wheel. |
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 button on the multifunction steering wheel. | This switches between the CCS and the speed limiter . |
Activating the ACC. | Press the button on the multifunction steering wheel. | 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 button on
the multifunction steering wheel. 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 button on the multifunction steering wheel. | 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 button on the multifunction steering wheel. | 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 button on the multifunction steering wheel. | 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 button on the multifunction steering wheel. | 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
If you do not maintain the minimum distance to a vehicle in front and the difference in speed between the two vehicles is so great that the braking action of the ACC is insufficient, you are in danger of colliding with the vehicle in front. You should reduce the vehicle speed immediately with the foot brake.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 sun visor centre mount
Note
Removal and installation is described for the sun visor
centre mount on the driver side. Follow same instructions for
the front passenger side as appropriate.
Removing
...
Renewing air conditioner compressor
Note
On vehicles equipped with an electrical air conditioner
compressor, de-energise the high-voltage system before removing
the air conditioner compressor.
→ Electric drive; Rep. gr.93
...
Blowing through refrigerant circuit with compressed air and nitrogen
Use compressed air to force moisture and other contaminants
out of the refrigerant circuit and use nitrogen to force
moisture out of the refrigerant circuit.
The method of blowing through the refrigerant circuit with
compressed air ...