Hi people, my father received his new xc90 2.5 T three days ago. super device!!! but there are some questions: 1. we noticed that the last piece of the roof is from “plasty”. is that all xc90 so and what kind of technical purpose does this have? 2. there is a loud high frequency whistle in the area of the right passenger door with some speed. sounds like a hatch fitted door. did someone ever have that? 3. sitting memory: when setting the seats, the specher function pos 1 and 2 etc works, but loud service instructions should also be stored on the keys, meaning lock 1 opens, the seat then moves into pos 1 , key 2 in pos 2 etc. but doesn’t work. what do we do wrong? many thanks for your tips, pictureveve