To be honest, most German commercials are pretty boring or trying to be funny and fail miserably. There are a few good ones, one insurance company makes pretty funny commercials, but you'd need to understand German to get the joke and they wouldn't be funny when I explain them. I'll see if any good one comes to my mind and find out if it's online...
We have a TV show that plays funny commercials from around the world, that says a lot about the quality of our commercials I think!!!