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
  #16  
Old 03-03-2003, 02:24 AM
Benzwood's Avatar
Registered User
 
Join Date: Jun 2002
Posts: 301
It seems to have gotten better with time -- or at least I've convinced myself of that.

I never had a ticking sound. I'd check to make sure the cable is fully seated in the back of your instrument cluster. If it's slipping that might damage the socket that it fits into.

I guess this is another vote for genuine MB for speedo cables.
__________________
1992 300E Sedan (Sold)
1999 E320 Wagon (Sold)
1995 E320 Sedan
1995 E320 Wagon
Reply With Quote
  #17  
Old 03-03-2003, 11:28 AM
Registered User
 
Join Date: Apr 2001
Location: fort worth
Posts: 363
My speedo cable has been replaced twice. My 87 300E has 313K miles. I was told that perhaps the cause of the bounce/noise was the transmission end's fault. I have been told that the "sun gear" fix was expensive as the trans needs to be pulled.

So I still hear a rubbing noise, perhaps worse with cold weather/ before warm up. Occ bounce too.
Reply With Quote
  #18  
Old 03-03-2003, 02:14 PM
Registered User
 
Join Date: Jul 2002
Location: S. Texas
Posts: 1,237
Here is one more thing you might check. The speedo in my 450slc would not move until about 30 mph. Then it would climb slowly to 60 and stay there. If you tapped the speedo face it would jump to the right speed. The problem was a loose screw in the speedo itself.

It is dead easy to fix. In the 450slc I have to pull off the steering wheel, which is not hard, (unless you have airbags) but I think in other MB's there is enough clearence between the dash and the wheel to get the panel out. Still, by removing the wheel you get more room to get behind the dash to remove connections.

Once the dash is out, the speedo assm. come away from the instrument cluster with 4 screws. Now you should have the speedo in your hand. There are 2 screws that hold the gear drive part to the dial and needle part. Remove these screws and look inside the gear part. Mine had a small screw in the upper center just above the drive magnet where the cable come in. In mine this screw had come out and was interfeering with the rotating magnetic wheel. I refitted the screw and have not heard a peep out of the speedo since.

The whole operation took about an hour. Remember, this was with an slc dash and may be different with yours.
Reply With Quote
  #19  
Old 03-03-2003, 03:27 PM
Registered User
 
Join Date: Dec 2000
Location: Battle Ground, WA
Posts: 576
Bouncy Speedo...

Hi there,
This probably doesn't apply, but I just got done repairing an '80 VW cabriolet convertible's speedo that first started bouncing, then went to max and spun off the needle. The problem with it was that the needle shaft has a bushing in the rotating magnet inside the speedo, and the bushing dried up and bound, causing the aluminum disk that normally operates from the eddy current induced by the magnet to become attached to the speedo shaft through the bearing, ruining the entire speedo. I took several units apart before I found enough parts to make up another unit that would fit the car. As far as speedometer cables go, I have always (for over 45 years now) lubed them with light grease. I use IBM's #17, which is a very light grease that doesn't melt under heat, but only because I worked for IBM for 31 years. Any very light grease should work fine. I used to use oil, but it will eventually decompose the housing cover and run out the bottom.
I have a '77 Jag that had speedo problems, it had dry bearings on the odometer shafts, which made too much of a load on the cable, causing noise problems. Lubing it cured the problem immediately.

Regards,
Richard Wooldridge
'82 300D/4.3L V6
Etc...
Reply With Quote
  #20  
Old 03-04-2003, 12:11 AM
Registered User
 
Join Date: May 1999
Location: Sacramento, CA
Posts: 1,472
So I was leaving for work this morning and I didn't get even get a half mile from my house when I hit 45 mph and all of a sudden this terrible screeching sound comes floating out of my instrument cluster.

Great.

I put up with it for about a second, did a U-turn, and slowly crept back to my driveway. Pulled the cluster, detached the cable, thought about it for a moment and realized there wasn't anything I could really do about it right then and there. I put the cable back in, stuffed the cluster back into the dash, hoped for the best, and drove off again. This time, I didn't get the noise, and it (so far) hasn't come back since.

In thinking about it, I think the problem really is more the speedo than the cable - it's been making light noises intermittantly for awhile, and the grease in the little speedo-end bushing that the cable plugs into is completely dried out. I lubricated it tonight with a couple drops of ATF and drove it around for a few minutes, while it hasn't cured the bounce/clicking completely, it seems to have helped. We'll see how it does in the morning.

Thanks everyone,

-anthony

(also, if I had to do the cable replacement over again (really hoping I don't), I'd pull the rubber grommet off the cable and feed it down through the dashboard, then put the grommet back on. I fed it up underneath the dash, and not only did I have to wrench the cable around to fit up there - possibly kinking it, but so far okay - it was a PITA getting it to feed properly through the cable guide.)
__________________
2000 C 2 3 0 Sport :: 180k
Reply With Quote
  #21  
Old 03-04-2003, 03:40 AM
Registered User
 
Join Date: Aug 2002
Location: Fort Collins, CO
Posts: 66
Could the "nervous" speedometer needle has something to do with the cable being stretched?

Peter V.
__________________
1986 Mercedes 190e 2.3
Reply With Quote
  #22  
Old 03-04-2003, 10:48 PM
Registered User
 
Join Date: May 1999
Location: Sacramento, CA
Posts: 1,472
Yeah, probably. There's always next time...

-anthony
__________________
2000 C 2 3 0 Sport :: 180k
Reply With Quote
  #23  
Old 06-13-2003, 01:35 AM
Registered User
 
Join Date: May 1999
Location: Sacramento, CA
Posts: 1,472
Just FYI for anyone in the future...

I figured out the problem with the needle - it was the bearing on the back of the speedo that the cable plugs into. The grease had dried out and was crumbling out of the socket. I had tried light oil/ATF at first, but it only worked for a couple days at best. Then I decided to try White Lightning, since I had picked some up to try on my antenna.

I put a couple of drops on the bearing, let it dry for a couple hours, and tried it out. It smoothed out the speedo for about two weeks. Then I took the cluster out again, and really went at it - a couple drops, let it sit, a couple more drops, spin the bearing, let it sit, a couple more drops, sit overnight, etc.

It's been about a month or so, and the speedo needle still moves smoothly. Hopefully it'll last through the summer, we'll see how it goes when the weather gets cold again!

-anthony
__________________
2000 C 2 3 0 Sport :: 180k
Reply With Quote
  #24  
Old 06-14-2003, 01:15 PM
Registered User
 
Join Date: May 1999
Location: Sacramento, CA
Posts: 1,472
I'm not sure, but I would probably say no. I think it's all electronic on the newer cars, with a speed sensor on the transmission and a wire running up to the cluster. If your G is still under warranty I'd have the dealer check it out.

-anthony
__________________
2000 C 2 3 0 Sport :: 180k
Reply With Quote
  #25  
Old 06-20-2003, 05:04 PM
sm0t's Avatar
Registered User
 
Join Date: Jun 2003
Location: Austin, TX
Posts: 17
Re: Bouncy Speedo

Quote:
Originally posted by Chris Haney
What causes the speedometer needle to bounce at less than 20 mph and occasionally at any speed?
A trick used by many Porsche owners withthis problem is too remove the speedo cable, add a little lube, such as graphite, and then swing the cable over your head like a lasso. This forces the lube along the enire cable. Reinstall the cable and VOILA! your done.
Reply With Quote
  #26  
Old 10-08-2003, 01:28 AM
Strider's Avatar
Registered User
 
Join Date: Sep 2003
Location: Washington
Posts: 83
Re: Re: Bouncy Speedo

Quote:
Originally posted by sm0t
A trick used by many Porsche owners withthis problem is too remove the speedo cable, add a little lube, such as graphite, and then swing the cable over your head like a lasso. This forces the lube along the enire cable. Reinstall the cable and VOILA! your done.
Probably more of a Texan thing than a Porsche thing
__________________
On the plains of hesitation bleach the bones of countless millions who at the dawn of victory, sat down to wait, and waiting -- died
Reply With Quote
  #27  
Old 10-08-2003, 11:47 PM
Registered User
 
Join Date: Jan 2003
Location: Near Detroit
Posts: 19
I have a 190E with speedo that liked to go full speed at the slightest provocation (kinda like someone else mentioned). My problem was in the speedo (which is a viscous drive), and I fixed it with directions from a site I found on a search for "2002 Speedometer Repair" from the BMW club of America or somesuch. Might help for someone out there.
Reply With Quote
  #28  
Old 11-17-2008, 10:14 AM
Registered User
 
Join Date: Oct 2008
Posts: 83
Found this thread since I noticed a slight bounce in my speedo around 40mph. Can someone point me to where the speedo connects at the transmission? Where exactly is this for a 93 300CE? Pics would help!
Reply With Quote
  #29  
Old 11-18-2008, 05:55 PM
Registered User
 
Join Date: Oct 2008
Posts: 83
Quote:
Originally Posted by optimizer View Post
Found this thread since I noticed a slight bounce in my speedo around 40mph. Can someone point me to where the speedo connects at the transmission? Where exactly is this for a 93 300CE? Pics would help!
wanted to follow-up and see if anyone could point me where to look for the connection point between the speedometer and the transmission. My speedometer bouncing comes and goes but I wanted to deal with it before it gets worst.
Reply With Quote
  #30  
Old 11-18-2008, 06:01 PM
dpetryk's Avatar
Electrons can do anything
 
Join Date: Sep 2001
Location: Houston, Texas
Posts: 1,071
Your spedo is connected electronically. There is no mechanical cable involved.
__________________
I got too many cars!! Insurance eats me alive. Dave

78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k
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




All times are GMT -4. The time now is 04:23 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