I bought this after marked sunroof wind deflector for my 300CD, the "manual" is not really helpful. How do I install this thing, do I have to remove the felt strips on the side?

Tnx

__________________
1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue).