Unfortunate but true. Same as in my '98 E320. It is a hard rubber piece that helps to keep moisture out of the door panel. You COULD trim it, but then you would be defeating the purpose of keeping water out of the door. But then again, since this is on the INSIDE, I can't see what harm can come of it either.....
A professional tinting shop experienced with this issue should be able to overcome it although the shops around where I live are reluctant to make that kind of modification. Having never actually seen the piece myself, I'm not sure if it is something that can be done with a razor or not.
In any case, just wanted to confirm that the part does in fact exist and that it will in fact scratch your tint (as it did mine).
Someone out there has gotta have an answer for you......
Best of luck
300SD ('81), 190E ('89), 420SEL ('86?), Jaguar XJ6 VDP ('96), E320 ('95), Jaguar XJ6 ('97), E320 [S210] 4matic wagon ('98), Nissan Maxima SE ('02), DeVille ('93), BMW 325 ('03), LS430 Ultra ('01), Avalon Limited ('05), S430 ('06), MINI Cooper ('05), Toyota Camry ('07), Hyundai Azera Limited ('07), E350 ('06), LS430 ('05)
Nissan Versa ('08), S430 ('03)