The XC90 I’m thinking of buying has a weird sort of roof panel just ahead of the rear spoiler on the roof. Why is it designed that way? Only thing I could think of is a non-metal panel for antennae...

Hi all,
So the slushbox in my V70 XC is getting replaced, and I'd like to know what other things I should ask them to replace as preventative measures "while they're in there". The car has about...