E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

Help, speedometer is off by 15-18 miles (higher)

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 12-07-2015, 09:00 PM
  #1  
Junior Member
Thread Starter
 
Gmoneys's Avatar
 
Join Date: Jan 2013
Posts: 54
Likes: 0
Received 1 Like on 1 Post
None yet
Help, speedometer is off by 15-18 miles (higher)

92 500e and the speedometer reads about 15 to 18 mikes higher.
How can I adjust it? My odometer & trip odometer are not working
Is these related to the speedometer?

The cluster light is dim so I may be taking it apart soon.
Has anyone seen or knows where to find red overlays for all 3 cluster Gage's?
I have seen some white ones on EBay but leaning towards red ones
Any leads will be appreciated!

G'
Old 12-08-2015, 07:04 AM
  #2  
Junior Member
Thread Starter
 
Gmoneys's Avatar
 
Join Date: Jan 2013
Posts: 54
Likes: 0
Received 1 Like on 1 Post
None yet
Anyone?
Should I just take it to a shop or is it something I can b
Fix?

Thx
Old 12-10-2015, 02:33 PM
  #3  
MBWorld Fanatic!
 
Saijin_Naib's Avatar
 
Join Date: Jun 2006
Posts: 4,968
Received 3 Likes on 3 Posts
1990 300ce 24v I6
Sounds like the gears in the assembly behind the cluster are messed up.

I had my cluster repaired by this shop:
http://www.speedometer.com/
Old 12-10-2015, 10:48 PM
  #4  
Junior Member
Thread Starter
 
Gmoneys's Avatar
 
Join Date: Jan 2013
Posts: 54
Likes: 0
Received 1 Like on 1 Post
None yet
Thanks Saijin! I'm actually working in Austin for the next couple of weeks.
I'll look them up.

G'
Old 12-20-2015, 12:46 PM
  #5  
Junior Member
Thread Starter
 
Gmoneys's Avatar
 
Join Date: Jan 2013
Posts: 54
Likes: 0
Received 1 Like on 1 Post
None yet
So I just replaced the odometer gears and got it working but speedometer still off!
Any ideas what it could be?

Thanks
Old 12-21-2015, 10:17 AM
  #6  
MBWorld Fanatic!
 
Saijin_Naib's Avatar
 
Join Date: Jun 2006
Posts: 4,968
Received 3 Likes on 3 Posts
1990 300ce 24v I6
No, unfortunately I wouldn't know where to look next :\

Sorry.
Old 12-22-2015, 12:59 PM
  #7  
Junior Member
 
thcdi's Avatar
 
Join Date: Mar 2012
Posts: 48
Received 1 Like on 1 Post
s210 320 cdi avantegarde
have you got the right sized wheel and tyres on it?
Old 12-22-2015, 09:35 PM
  #8  
Junior Member
Thread Starter
 
Gmoneys's Avatar
 
Join Date: Jan 2013
Posts: 54
Likes: 0
Received 1 Like on 1 Post
None yet
Just got the car a month ago. It has the amg starfish wheels in 18" staggered.
Old 12-23-2015, 12:18 PM
  #9  
MBWorld Fanatic!
 
Saijin_Naib's Avatar
 
Join Date: Jun 2006
Posts: 4,968
Received 3 Likes on 3 Posts
1990 300ce 24v I6
You need to change the reduction gears on the speedo/odo cluster to match your tire size.

You just found your problem :P

The gears are calibrated for 195/65r15.
Old 12-23-2015, 05:29 PM
  #10  
Member
 
93Corrado's Avatar
 
Join Date: Jun 2006
Location: Weehawken, NJ
Posts: 103
Received 2 Likes on 2 Posts
'05 C230 SS, '94 E420 (RIP), '05 C55
Originally Posted by Saijin_Naib
You need to change the reduction gears on the speedo/odo cluster to match your tire size.

You just found your problem :P

The gears are calibrated for 195/65r15.
A '92 500E speedometer would be calibrated for 225/55-16, not 195/65-15. There's about 3% or 1.7 MPH difference between those two sizes on a 500E.

I recently had to recalibrate my speedometer after swapping from a 2.24 to 2.82 rear on my E420. Instead of fooling around with the speedo gears, I purchased one of these: http://www.dakotadigital.com/index.c...rod/prd126.htm

It was very easy to install. Pulled the cluster, spliced into a 12v power supply, added a ground wire, added two wires (1 from wire for the speed sensor to the interface and 1 from the interface to the speedometer). I downloaded a the Speed Box (GPS speedometer app) on my iPhone and used it to calibrate the speedometer while driving.

I used this write up as a guide:
http://www.benzworld.org/forums/w126...a-sgi-5-a.html
Old 12-24-2015, 01:15 AM
  #11  
MBWorld Fanatic!
 
Saijin_Naib's Avatar
 
Join Date: Jun 2006
Posts: 4,968
Received 3 Likes on 3 Posts
1990 300ce 24v I6
Originally Posted by 93Corrado
A '92 500E speedometer would be calibrated for 225/55-16, not 195/65-15. There's about 3% or 1.7 MPH difference between those two sizes on a 500E.

I recently had to recalibrate my speedometer after swapping from a 2.24 to 2.82 rear on my E420. Instead of fooling around with the speedo gears, I purchased one of these: http://www.dakotadigital.com/index.c...rod/prd126.htm

It was very easy to install. Pulled the cluster, spliced into a 12v power supply, added a ground wire, added two wires (1 from wire for the speed sensor to the interface and 1 from the interface to the speedometer). I downloaded a the Speed Box (GPS speedometer app) on my iPhone and used it to calibrate the speedometer while driving.

I used this write up as a guide:
http://www.benzworld.org/forums/w126...a-sgi-5-a.html
Good catch. I assumed 300e

That sounds like a pretty elegant solution to the issue of how to make the gear-driven cluster accurate. Well done!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Help, speedometer is off by 15-18 miles (higher)



All times are GMT -4. The time now is 10:38 PM.