Operation is identical to:
WARNING: This page is about a different car, the 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW M Roadster, and 2001 BMW M Coupe. However, it is still accessible from the selected car via links, so may be relevant.
Replacing trim on rear apron at top, refer to 51 46 061 Replacing panel on rear apron at top (Z3 coupe, M coupe) .