W220 320 cdi heated rear screen.

Steve w220

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W220 s class 320 cdi 2002
I have owned the car for a couple of years and love it it's always had rear windows that work when they wanted and a heated rear screen that never worked despite the switch illuminating for the correct time . So today I decided to check th e fuse under the rear seat and it was blown ,I replaced it switched it on and it blew straight away . Can anybody point me to a wiring diagram for the hrw or know if the relay would be the cause? Thanks in advance ,steve.
 

moj91

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Northamptonshire
Your Mercedes
W204 C-Class 250 CDi, W220 S-Class 320CDI (AMG Kit), W168 A-Class 170CDI, W210 OM606, W124 OM606...
I know there is a module in the rear pillar behind the trim which was causing similar issues with ours (blowing fuses/crackling noise on stereo etc) but i cant recall anything further than that I'm afraid! :/
 
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Steve w220

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W220 s class 320 cdi 2002
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I know there is a module in the rear pillar behind the trim which was causing similar issues with ours (blowing fuses/crackling noise on stereo etc) but i cant recall anything further than that I'm afraid! :/
Thanks for that, I think I will pull the relay and check it hasnt gone to earth then work my way towards the rear pillar..
 

moj91

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Jul 12, 2013
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339
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Location
Northamptonshire
Your Mercedes
W204 C-Class 250 CDi, W220 S-Class 320CDI (AMG Kit), W168 A-Class 170CDI, W210 OM606, W124 OM606...
If you put your VIN into the website www.partsouq.com, you should be able to find a schematic of the pillar area and potentially offending module!!
 
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