Me and my Brother are going to germany 26.11.2008. We fly to Dusseldorf and spend there 2days doing nothing =) (well we don't know yet what we're doing there. Maybe just driving around)

But here is the question (if someone knows):

Is there (in Dusseldorf i mean) those cheap/free "city cars" to be rented ?? I mean those small (usually SMART) cars that have some big advertisement all over it. The rent is very cheap because money comes from advertisers.

Here in Finland we have those in Helsinki. One day rent is only 5 Eur.
Here is more info in english