Join Date: Dec 2005
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Welcome to the forum.
The fuse for the heated rear screen should be number F20 in the fuse box under the steering wheel.It also controls the reverse lights and the rear wash wipe,so if they still work it's not a fuse problem.
Broken wires running through to the tailgate by the hinges are reasonably common,so it's worth having a look at those.Ideally you need a test light or mulitimeter to check the feed and earth connections before going to much further.
I'd rather push my Alfa than drive a BMW....
Currently in Lagdti's garage:
2004 Saab 9-5 HOT Aero and a 2001 Audi A3 1.8 Turbo