See also:

Servotronic
The conceptThe Servotronic varies the steering force required to turn the wheels relative to the vehicle speed. At low speeds, the steering force is strongly assisted, i.e. less force is needed f ...

Opening
Press the switch to the resistance point. The window opens while the switch is held. Press the switch beyond the resistance point. The window opens automatically. Pressing again stop ...

Following part replacement
The same breaking in procedures should be observed if any of the components mentioned above have to be renewed in the course of the vehicle's operating life. ...