there are no Nude-O-Scope machines active in Germany beside the MMW test set in HAM so you will not encounter any hazzle.

Laptop out, no liquid etc is standard in Europe so you have to live with that, but you can leave shoes and belt on. In case you set off the alarm you might get a pat down (as well as they select random flyers for it more frequently now) but you will encounter the security checks as more professional then TSA ones.

Cheers, Tjobbe