Yes, many times. In my case we were five musicians and two roadies in a Transit van that the roadie souped up the engine of but left the manky appearance of it on the outside. The autobahns were a dream to drive on, like playing Scalextric: you can shift from one lane to another depending on your speed and sitting in the co-pilot seat up front was a dream. They're also spotlessly clean, very clearly laid out, and getting from A to B is a swizz.
We drove on from Hamburg to Berlin, and this would have been in the early to low mid 90's. The wall had just come down and Berlin was buzzing. But you could see the difference immediately: the poor fuckers east of the wall had it hard.
I first went to Check-point Charlie around the low-mid 80's on an InterRail ticket with my lady: I have a photo of myself outside a McDonald's right next to the western line. I was fucking disgusted that they built a filthy burger joint right next to the check-point. It cheapened the whole experience and I was mortified to think also how provocative a thing it was to do: the people living on the far side could see and smell the joint - but were locked in eating cardboard boxes.
Rotten.