Thanks for all your comments guys!
Currently no new mods are planned since i just bought a new set of tyres but you never know whats gonna happen tomorrow ;)
I still like the flat oem spoiler with the integrated brake light but at the moment iam happy with my little TTE one.
to answer your questions
Got the TTE (Bilstein) adjustable Suspension. I'm quite happy with it altough i took some time to find the right settings.
Those are 18" BBS. I think they were Dealer option at least in Germany.
According to the BBS Site they are called "RX"
So long!