Nope
#1
Can they go down any further than midway? If so, how?
#3
Our SAAB is the same way. If you examine the shape of the rear doors, you will see that it would take a very special window to be able to go down fully.
#4
I was surprised by the lack of opening as well. Our '09 Jetta with a smaller back door and larger extension into the rear fender still had a better opening distance. The Passat is a little disappointing in that area.