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Old 08-09-2002, 07:46 AM
Registered User
Join Date: Aug 2002
Location: Atlanta Ga. area
Posts: 24
Unhappy 85 CD electrical anomoly

It's haunted! My 85 300CD horn did not work (who needs one anyway?)...fuses OK - no other electrical probs-then for no apparent reason the horn becomes operative and simultaneously the passenger front window ceases to function (won't roll up) and the driver side rear (tiny) window won't roll down. Fuses are all intact (visually). Nothing seems to be disconnected under the hood...Arrrgh! Where do I begin?
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Old 08-09-2002, 07:19 PM
Join Date: May 2002
Location: Des Moines, Iowa
Posts: 64
HI Mike

Check them fuses again, real close this time! The fact you have the two windows that are inopertive tell me it is a fuse without a doubt. Mercedes wires the window cross ways. LF & RR on one fuse and RF & LR on another. As for the horn. Can't say I have a Silver Bullet for that one, sorry.

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Old 08-10-2002, 10:14 PM
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Join Date: Aug 2002
Location: Atlanta Ga. area
Posts: 24
Thumbs up


Many thanks! I located the proper fuse, and I promise that it looked just fine - HOWEVER - I changed it anyway and behold - both windows worketh again! I'm as happy as a dead pig in the sunshine! Still can't figure out the horn, but since it is now working, guess I won't worry about it...thanks again.

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Old 08-11-2002, 02:53 AM
Registered User
Join Date: May 2001
Location: Florida
Posts: 1,105
Originally posted by mike riemann

I'm as happy as a dead pig in the sunshine!
glad you found your problem, but how exactly is a dead pig happy??
83 300SD.......sold
96 integra SE....sold
99 a4 quattro....sold
2001 IS300.......sold
2002 330i.........current.
2004 highlander limited....current.
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Old 08-11-2002, 04:11 AM
Posts: n/a
Its warm again!
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Old 08-11-2002, 10:44 AM
MikeTangas's Avatar
Senior Member
Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
Your horn may be intermittent due to worn slip rings between the steering wheel and column. Not a terribly difficult operation to replace, parts are about $74.00 and requires complete disassembly of the steering wheel. Unless you need the horn to pass a State inspection you can wait until the horn completely ceases to function before repairing.
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon least its a diesel

Non illegitemae carborundum.
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Old 08-11-2002, 11:22 AM
Kyle Blackmore's Avatar
Mostly Harmless
Join Date: Sep 2001
Location: almost beyond Hope...B.C.
Posts: 897
Mike try new fuses,just replace them all.They seem to break down after some time,even though they look OK they can give you intermittent troubles.The 8 amp fuses seem to be the worst,they get real thin in the middle almost as if they were stretched.Good luck
1985 380SE- 160,000km 'Blistu' - Sold
1988 300CE- Eva,my garage mistress
2007 R350 4matic- The Black Pearl
2011 Ford Ranger-Work truck
1974 25' Trojan Sea Raider- 'Grannyknot'
2002 215 cm Atomic DH skis- Canadian SDH record holder, 175.5km/h- Vars 2010
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Old 08-11-2002, 08:01 PM
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Join Date: Aug 2002
Location: Atlanta Ga. area
Posts: 24

Many thanks for the note...I may get ambitious and have a close look at the ring you seems taht parts for these diesels are not all that hard to find...I had no idea what I was missing until I got my first one...what a cool machine!

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