Hi there, I am have had an 850 wagon ('94 GLE)for just under a year now, when I bought it I was told that the rear demister only worked on the top half of the screen, as it was summer I thought it would give me plenty of time to find what the problem was and fix it, but, I cant find any help on it, the haynes manual doesnt mention the rear screen (I cant even find it in the electrical wiring schematics) is it a double pole circuit or will there be a split somewhere or anything, where are the contact points for the lass wire? please help as now its winter it would be helpfull to be able to see more than trucks in the rear view mirror.
Thanks.