5. Assembly

WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

Apply a thin coating of anti-friction agent to the reverse side of the window guide seal only
Perform fitting within 30 minutes of applying anti-friction agent
Anti-friction agent dries after fitting and becomes sticky