W124 500E rear demister

[DaleB]

I recently bought a 1993 W124 500E. For the first time I've needed to used the rear window demister and found it not working (or possibly extremely weak at clearing). Is this a common faulty and a straight forward window swap or could it be a cheaper fix?

Cheers Dale

 

[Dec]

When you switch it on, does the Red light on the demister switch remain on for about 15 minutes?

Dec

 

[DaleB]

The orange light on the switch stays on ... it only takes me 10minutes to get to work

 

[Dec]

Check that the fuse for the demister is clean and making good contact with its holder.

The N10 relay controls the rear demister, open it up and check it out, guide below.

There should be visible progress of demisting within 1 or 2 minutes.

Guide… N10 Relay, Soldering Repair, Wiper - Indicators & Hazards - Rear Window Demister. - Mercedes-Benz Owners' Forums

 

[MrMotul]

Unfortunately Dale, it is a common fault on W124 500E's & E500's