Second post in a week, thanks for all the advice first time.
My A7 has a strange issue - I have just noticed the sound of fluid moving up and down inside the tailgate when it raises and lowers - it appears to be on the right arm of the tailgate as you look at it from the back of the car - it is really disconcerting!
I did have a removable tow bar fitted to the car when I bought it just to put a bike carrier on, and I think they had to dismount the rear right light cluster, but I can't see easily how this could have caused it, and the car is generally in absolute perfect condition with no damage or adverse history I can see. It didn't do it when I bought it a few months ago I don't think, but then it was the summer!
Has anyone seen anything similar before? Everything looks flush and tight, and it sounds like a decent amount of fluid moving around.
Many thanks
Mat