Carlos from Spain:

  Yes (in other parts of Germany it is possible)

But if its an old religious law, why is it enforced (if it is enforced)? how can a cop give you a fine for not resting on Sunday by washing your car if you are not bothering anybody or causing any harm?... I'm sorry but I find this too unreal... I mean you can freaking wash a gay parade's double decker open top bus in the Vatican on Sunday if you wish or do what ever you like on Sunday Smiley

Wait, the law isn't that businesses can't be open, it's that people may not wash their cars on Sundays? Seriously?!