I think they do. Trying to figure out what would work best, on the windshield would put it too far away to use it I think. I may have to make something up to mount it to the top of the dash somehow. I'm also working on hacking my car stereo to use the unused CD changer input as an aux input, so that I can play music from the phone right through the cars speakers.
We just picked up vent brackets for our vehicles over the weekend. I'm thinking it will work well in your German auto if the vents are at the top of the center stack...near the dash.
It's a Bracketron:
![bracketron-gripit-gps-vent-mount_6756043_175.jpg](http://images.buzzillions.com/images_products/04/76/bracketron-gripit-gps-vent-mount_6756043_175.jpg)