See also:

Screw thread
Push out the cover by pressing on the top edge. ...

Airbags
The following airbags are located under the marked covers: 1.  Front airbags 2.  Coupe: head airbags 3.  Side airbags in the seat backrests 4.  Convertible: knee airbags Pro ...

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. ...