Click the following link for official instructions (in PDF) on installing the OEM Rear Deck Spoiler Lip.
Rear Deck Spoiler Lip Install Instructions
P.S. The
glue / adhesive you see in instructions is called Betalink-K1 (BMW part Number
82-69-9-408-866). It retails for 12.75 + tax ... and comes in a complete set with sand paper, glue, cleaner, applicator. Thanks to member "Tape" for this information.