Need help: buying a car in Germany

[tnas at euronet.nl]

Hi all,

I need the help of our German q-listers!

I'm considering buying a parts car in Germany, and would like to know what 
the procedure is for buying a car there. In Holland, you pay the owner and 
go to the post office to put the registration in your name. There's a small 
fee involved for the registration stuff and you need to bring a driver's 
licence or passport to confirm your identity. Is this similar to German 
procedure? What is the fee?

TIA for your insights!

Regards, Tom