I was at the dealer's this morning having an oil change done on our P5 and went strolling down the lines of stored new cars. There was an '03.5 P5 on the lot with the standard subwoofer. I noticed that the roof seam fillers have four little slide covers for the roof rack mounting bolts. Looks like the roof rack on the newer models is mountable without removing the interior trim and headliner. Might explain some why the filler strips are so pricey. Jim