is it the A8 i think near a town called wiesensteig?
I can see where you’re coming from, but no 
Inselaffe:
I can see where you’re coming from, but no
thats the only bit of windy, split autobahn i can think of 
But it is correct, that it is somewhere in the south of germany?
Southern Germany it is
A7?
The A7 is the longest Autobahn in Germany, so you would have to be more specific.
But no, it isn’t 
are you anywhere near ulm?
A93?
'Fraid not, lads
Munich
A3 near Regensburg?
Keep plugging away, guys
A8 South of Rosenheim?
Sorry,fella
A4, after the Kircheimer Dreieck
Nope. A bit too far north
Hm, and I thought, i know germany.
A6?
Getting warmer