There are a bunch of black circular fasteners.
Pull the centre pins out - use a flat blade screwdriver if necessary to prise the head up. Then the rest of the fastener will pull out.
Re-installation is the reverse: insert the main body and then push in the centre pin to lock.

__________________
1990 300CE-24 (Gone but not forgotten)
2002 SLK 32 AMG
2002 ML320 (Gone)
1995 E320 Cabriolet