Hi,
I am new to the Audi world, I have a 1.4tfsi 2010 A3 and I'm working through the small niggles as I find them.
As its got colder I have realised the rear screen demister does not work at all. I am questioning weather the heated wing mirrors are as well but I *think* they are ok. I am going to put a multi meter across the terminals at some point.
Going back to the rear screen I have had the boot lid cover out to try and fix the issue, no tabs are broken on the element wiring, the fuse is fine. So I am trying to rule out if its the "antenna booster" module, pics below. It seems the heated screen power wires go into this unit, the 2 right black blocks seem to be left and right.
Can anyone shed some light on this for me? is it likely to be a failed unit, or do they rarely fail?
I need to do some more investigating, I also need to check the switch although that lights up when pressed and stays on for its timing.
Thanks