To start the function requires the following:
- The driver's seatbelt must be buckled and the driver's door must be closed.
- There must be a vehicle (the "target vehicle") within reasonable distance in front of the car, or the current speed must be at least 15 km/h (9 mph).
- For cars with manual gearbox. Speed must be at the lowest 30 km/h (20 mph).
Press the steering wheel button ◀ (2) or ▶ (3) to scroll to the adaptive cruise control symbol 
(4).
(4).The symbol is grey – the adaptive cruise control is in standby mode.
When speed limiter is selected – press the steering wheel button 
(1) to activate.
(1) to activate.The symbol is white – the speed limiter is started and the current speed is stored as maximum speed.
Reactivating adaptive cruise control to the last stored speed
When the adaptive cruise control is selected – press the steering wheel button 
to activate.
to activate.The cruise control markings and symbols in the driver display change colour from GREY to WHITE — the car will now follow the most recently stored speed again.
Warning
A significant increase in speed may follow when the speed is resumed with the steering wheel button.
steering wheel button. Additional indicators in the driver display
The time interval is only adjusted to the vehicle ahead by the ACC when the distance symbol shows two vehicles.
At the same time a speed range is marked.
The higher speed is the stored speed, and the lower speed is that of the vehicle ahead (target vehicle).