Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 06-30-2005, 07:42 PM
WANT '71 280SEL's Avatar
I'll Go Upside Your Head!
 
Join Date: Jan 2003
Location: Dallas, TX
Posts: 3,378
instruments guages suddenly fail?

I am referring to my '87 300SDL. I parked the car for 5 minutes while I ran into school and after restarting the car, none of the guages worked. I didn't notice until leaving the parking lot and later today I've noticed some other non-functional items. For instance, the A/C compressor won't come on but the blower works, the only warning lights that come on is the:GP, antilock, ABS, and alternator. There may have been one other light that comes on, but none of the others do (low oil, low washer fluid, seat belt). They won't come on when the key is in the "on" position while waiting for the GP light to go out. Also, the odometer isn't counting and I think this just started, but while the car is idling with the LF door open, the warning buzzer sounds. I don't think it used to do that.

Now, as far as diagnosing, I have checked and double checked the fuses to make sure they aren't the culprit. I also made sure that other components sharing the same fuse worked, and they did. I even switched fuses around to no success.

This has produced no warning signs. 2 weeks ago though there was one or two times that the oil pressure guage didn't register for the first 5 or 10 minutes of driving but all was fine earlier today. A month ago I repainted the needles, but like I said, everything's been fine. 3 months ago I replaced the electrical part of the ignition switch to cure a problem of the key not fully reseating after cranking the engine. I've moved the key around to see if that would help since that's how to diagnose a key switch and still nothing would happen. Please help as this is very frustrating for me. I just got the car running after being down for a week yesterday, now this!

Thanks
David
__________________
_____________________________________________

2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

_____________________________________________
Reply With Quote
  #2  
Old 06-30-2005, 08:00 PM
Registered User
 
Join Date: Dec 2000
Location: Fairfax County, Virginia
Posts: 856
WANT,

My OVP and Klima story is at: Another OVP (Success) Story

In it I tell story of same issues you have - and how I got sidetracked by the Klima relay only to find the Over Voltage Protection (OVP) was the problem ... easy, inexpensive fix for me.
__________________
George Stephenson
1991 350 SDL (200K and she ain't bent, yet)
former 2002 E320 4Matic Wagon - good car
former 1985 300 CD - great car
former 1981 300 TD - good car
former 1972 280 SEL - not so good car
a couple of those diesel Rabbits ...40-45 mpg
Reply With Quote
  #3  
Old 06-30-2005, 08:06 PM
WANT '71 280SEL's Avatar
I'll Go Upside Your Head!
 
Join Date: Jan 2003
Location: Dallas, TX
Posts: 3,378
Is the OVP the one that is an aluminum tower with a 10A fuse on it? It has a red door at the top that closes on top of the fuse? I checked that fuse and it was ok. I'll go check it out just incase.

Thanks
David
__________________
_____________________________________________

2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

_____________________________________________
Reply With Quote
  #4  
Old 07-01-2005, 12:21 AM
WANT '71 280SEL's Avatar
I'll Go Upside Your Head!
 
Join Date: Jan 2003
Location: Dallas, TX
Posts: 3,378
Well, I got the OVP apart. It seems you have to slide the red piece that's under the fuse out or it won't let the aluminum slide off. Simple once you see how it works really.

Anyways, I noticed while driving tonight that I don't have brake lights either! I think this could turn into a dangerous problem for me. Am I the only person who has had a similar failure?

Thanks
David
__________________
_____________________________________________

2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

_____________________________________________
Reply With Quote
  #5  
Old 07-01-2005, 01:21 AM
Registered User
 
Join Date: Oct 2004
Posts: 482
I've had the same problem, but it was a fuse in the fuse box. Brake lights, dash instruments all went out. I would just pop in a new one to make sure.
Reply With Quote
  #6  
Old 07-01-2005, 09:43 AM
WANT '71 280SEL's Avatar
I'll Go Upside Your Head!
 
Join Date: Jan 2003
Location: Dallas, TX
Posts: 3,378
What model car was it? I replaced the fuse and that didn't help.

Thanks
David
__________________
_____________________________________________

2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

_____________________________________________
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Dash guages stopped & car won't start John W Tech Help 2 06-24-2005 09:50 AM
420 Suddenly Dies Bishop Tech Help 3 01-06-2005 10:56 PM
w126 - all instruments stopped working daverdla Diesel Discussion 18 10-08-2004 12:57 AM
Need help reading A/C guages 420benz Tech Help 7 07-22-2004 09:27 PM
Dead Guages on 83 300 SD MB_SOOT Tech Help 1 03-31-2004 05:14 PM



All times are GMT -4. The time now is 05:11 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page