See also:

Automatic locking feature
The vehicle locks automatically when the ignition is switched on and the wheels of the vehicle are turning at a speed of more than 9 mph (15 km/h). You could therefore be locked out when: • ...

Activating/deactivating the acoustic locking verification signal
If you activate the Acoustic Lock Feedb. function, an audible signal sounds depending on the vehicle's date of manufacture: • when locking or • once when unlocking and three times when loc ...

Adaptive backrest (AMG vehicle)
You can adjust the contour of the front seat backrests individually so as to provide optimum support for your back. Adaptive backrest (AMG vehicle) 1 To adjust the upper back support 2 To adj ...