Re: Car rental concern
I can only second what others said, had similar experiences with europcar, on one occasion in Geneva I rented a car for a weekend, returned it and the return guy showed me a new scratch on the front corner (ok, it happens, maybe somebody scratched the car while it was parked somewhere). He says it's no big deal, takes a picture of it and writes it down, I sign everything.
A few weeks later, they send me a bill of about the same amount as OP got, with a picture as proof - only on the picture it was a whole flake of paint missing, much, much bigger than what was there when I gave the car back.
TL;DR Stay away from Europcar, and take your own pictures before and after the rental.