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 07-08-2002, 08:18 AM
Registered User
 
Join Date: Apr 1999
Location: Apex, NC USA
Posts: 176
Bouncy Speedo

What causes the speedometer needle to bounce at less than 20 mph and occasionally at any speed?
__________________
1991 350 SDL
183,000 miles

1982 240D
130,000 miles
Reply With Quote
  #2  
Old 07-08-2002, 08:47 AM
Gilly's Avatar
Registered User
 
Join Date: Mar 2001
Location: Evansville WI
Posts: 9,616
A worn or dried out speedo cable.
Gilly
Reply With Quote
  #3  
Old 07-08-2002, 01:49 PM
Registered User
 
Join Date: Mar 2002
Location: Chevy Chase, Maryland
Posts: 62
Is it possible to re-lube a speedo cable before going for a replacement. I have a 85 300D.

Thanks,
Dan
Reply With Quote
  #4  
Old 07-08-2002, 02:43 PM
dpetryk's Avatar
Electrons can do anything
 
Join Date: Sep 2001
Location: Houston, Texas
Posts: 1,071
Sure, you can re-lubricate anything.
__________________
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
  #5  
Old 07-08-2002, 03:09 PM
G-Benz's Avatar
Razorback Soccer Dad
 
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
Kinda messy job though (or maybe it's just me)...

...check for any kinks in the cable sheath too..
__________________
2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car
Reply With Quote
  #6  
Old 07-08-2002, 06:57 PM
Registered User
 
Join Date: Mar 2002
Location: Chevy Chase, Maryland
Posts: 62
I visualize unscrewing the cable from the back of the speedometer and dripping or squirting a lubricant in somehow, or does the whole cable have to come off? And what lubricant would you suggest I use?

Thanks,
Dan
Reply With Quote
  #7  
Old 07-09-2002, 04:49 PM
Tump's Avatar
Registered User
 
Join Date: Jun 2001
Location: Westchester, NY USA
Posts: 183
How to lube a speedo cable

When I had my 87 300E, I had the same speedo needle jumping problem. A Benz technician told me what the trick was.

Disconect your speedo cable at the transmission. Apply a good blob of standard grease to the cable end. Reconnect the cable.

Because of the way the cable rotates, the grease will be pulled up along the cable to its end at the speedometer. The new grease should stop your jumping problem as it did mine.

10 min. 15 cent fix.

Marc
1999 C43 AMG (for 1 hour) (to return in August)
1987 300E Obsidian Black, Palomino Interior (traded in on C43)
Reply With Quote
  #8  
Old 07-09-2002, 06:19 PM
Registered User
 
Join Date: Mar 2002
Location: Chevy Chase, Maryland
Posts: 62
Sounds like the way to go. Thanks.

Dan
Reply With Quote
  #9  
Old 07-09-2002, 06:27 PM
LarryBible
Guest
 
Posts: n/a
Negative on the above methods. You pull the cable out of the housing from whichever end it will come out. You then wipe it off real good with a clean dry cloth, apply liberally graphite or maybe better is the regular speedometer cable lubricant you get at the parts store. You then push it back in and hook it up.

That's all there is to it.

Have a great day,
Reply With Quote
  #10  
Old 07-09-2002, 07:28 PM
Benzwood's Avatar
Registered User
 
Join Date: Jun 2002
Posts: 300
A timely thread... I just tried lubricating my speedo cable for this exact problem, without success. In fact it got a bit worse after I messed with it.

The cable on my car ('92 300E) does not seem to be separable from the sheath, from either end, so I couldn't really get any amount of lube into it (I tried spraying lithium grease into it).

In any case, it didn't seem particularly dried out anyway. I wonder if my symptons are instead caused by the cable starting to come apart, i.e. it requires some twisting at speed to maintain tension in the cable.

Anyway, I've got a new one on the way... not too expensive for my car ($38.50).
__________________
1992 300E
1995 E320
1999 E320 Wagon
Reply With Quote
  #11  
Old 07-10-2002, 08:46 AM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
All the Benz cables I've seen , both speed and tach, are sealed
sheath and can not be lubed.
Reply With Quote
  #12  
Old 07-10-2002, 02:04 PM
Member
 
Join Date: May 2002
Location: Des Moines, Iowa
Posts: 64
HI Chris

Correct me if I'm wrong (which would only be the 3rd or 4th time today) here guys but isn't this a 126 chassis car? If so I have never seen one that has a speedo cable since all the speedomoters are electric in the 126. As far as lubing the cable I do it from the top. Get some graphite cable lube for motorcycle cable and let it drip down the cable. Good luck.

fasthair
Reply With Quote
  #13  
Old 07-10-2002, 03:35 PM
Registered User
 
Join Date: Apr 2001
Location: fort worth
Posts: 363
can a boucy speedo occur with problems in the speedo itself? Are there ever problems with the transmission link that would cause a bouncy speedo?

I have an 87 300E with 305K miles, a stuck trip odometer and bouncy speedo.
Reply With Quote
  #14  
Old 07-11-2002, 05:52 PM
Benzwood's Avatar
Registered User
 
Join Date: Jun 2002
Posts: 300
I installed my new speedo cable and my 20mph bouncing went away... to be replaced by some shaking around 40mph.

In addition, it doesn't register at all until about 15mph when starting out, though it will register 15 down to 0 when slowing down.

The replacement part is not MB, it's "GEMO", made in Germany. A couple of minor external differences, including the ability to pull out the inner cable.

The cable was not turning "silky smooth", so I tried pulling the inner cable out and lubing it with Lithium spray grease, but didn't seem to make any significant difference.

I also tried driving it with the cable hanging in a gentle arc rather than clipped to the transmission to avoid the harshest bend, but same deal.

Should I have sprung for the genuine Mercedes part? Or is my problem elsewhere? Or do these speedos always have a little flakiness to them?
__________________
1992 300E
1995 E320
1999 E320 Wagon
Reply With Quote
  #15  
Old 03-02-2003, 09:53 PM
Registered User
 
Join Date: May 1999
Location: Sacramento, CA
Posts: 1,472
Benzwood (or anyone, for that matter)

Were you able to fix the problem with your new speedo cable? I just finished a cable install in my '87, and while the speedo bounces less, it still bounces at all speeds, and now it makes a ticking noise instead of bouncing silently. I used the GEMO part as well.

-anthony
__________________
2000 C 2 3 0 Sport :: 180k
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 03:10 AM.


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