Cabriolet rear demister failure

[PhilF]

Hi all

Have just purchesed a 1.2 tfsi sline A3cabriolet and have just noticed that the rear demister does not seem to work. The light on the dash lights up so I assume that fuse is OK. I Do not have a handbook at present so I have no information about fuses, relays etc. 

1. Where is the relay and exactly and where does the power connect to the rear window

2. Also have roof lining sagging directly above the rear window and I cannot see how to re-attach as there just seem s to be 2 flat surfaces.

Thanks in anticipation

Phil

 

[cliffcoggin]

Wiring diagrams are available on the internet:

https://www.google.co.uk/search?newwindow=1&rlz=1CAACAH_enGB721GB721&ei=k3CAWuCoIKycgAaJrY6QCw&q=audi+a3+wiring+diagram&oq=audi+a3+wiring+diagram&gs_l=psy-ab.3..0i7i30k1l3j0j0i7i30k1l5j0.20893.23815.0.28899.26.13.0.0.0.0.334.1690.1j4j1j2.8.0....0...1c.1.64.psy-ab..23.2.465....0.FnXwdfkDtUI

I wonder if your two problems are related i.e. the previous owner removed the head lining trying to get the demister wiring.