2.0 Surface Preparation

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

For better adhesion, remove oxide film and paint from the adhesive areas with a stainless steel wire brush or special sandpaper.
Clean bonding surfaces with cleaning agent R1.
Allow cleaned surfaces to dry for approx. 5 minutes.
Bonding surfaces must be completely dry.