Where in the world was World Wide Kev?

A better question would be, where in the hell was the $6MMm?  Since I know where WWK was, we'll go with that.  Instead of drinking beer with his friends, World Wide Kev was in....

Hints:

• sprechen sie deutsch
• The original castle was built by Charlemagne
• It's the home town of an imfamous fast food thief

Answer?  Hamburg, Germany

The Hamburglar is from Hamburg, right?