where to find the how to on odo repair 126?? (slipping) - PeachParts Mercedes-Benz Forum

#1 06-01-2007, 04:45 PM

dieselgiant has one but his site is so weird. I can't find the hack that's for sure. anyone have a link??

vstech · #2 06-01-2007, 04:50 PM

just pull out your speedometer, you will have no trouble finding the problem.
John

#3 06-01-2007, 06:01 PM

Quote:

Originally Posted by vstech

just pull out your speedometer, you will have no trouble finding the problem.
John

ok. I tried that and I don't see what is wrong with the thing

300SD81 · #4 06-01-2007, 06:05 PM

I'm betting the plastic gears are gone, every single one I've ever seen has had that problem..

TX76513 · #5 06-01-2007, 06:19 PM

Henry what is the procedure for removing the speedo head....need to pull mine out.

clint77002 · #6 06-01-2007, 06:26 PM

I've fixed two of them.
The gray pot metal gear is likely spinning on the shaft. The solution is to make that gear grab the shaft again.

Tools needed:
long nose pliers
toothpick or similar sized drill bit
scotch tape
locktite blue

Pull the instrument cluster
remove the center instruments (spedo and odometer)
remove the odometer component.
you'll see metal pin going through the numbers
put the scotch tape over the numbers to keep them aligned and from falling out.
There is a small metal disk on the side oposite the plastic drive gears. Using the long nose pliers, pull this off carefully by pushing the pin through it.
Just as you get the metal pin to out of this disk, follow the pin with the toothpick or drill bit. You don't have to completely remove the pin, just push it out about 1/2"
Now, the pin should stick out past the pot metal gear about 1/2".
Scuff up the pin (shaft) and put a drop of locktite blue on that scuffed up area.
push the pin back into the assembly.
Put the metal disk back on the shaft like it was before.
I spin the odometer using the white plastic gear for about 5 minutes to spread the loctite around.

You're done.

I hope this was helpful..
clint

TX76513 · #7 06-01-2007, 06:28 PM

Clint hope you are talking about the electronic 126 speedo's. What screws remove the odometer head or otherwise allow it to be removed.

300SD81 · #8 06-01-2007, 06:56 PM

Quote:

Originally Posted by TX76513

Clint hope you are talking about the electronic 126 speedo's. What screws remove the odometer head or otherwise allow it to be removed.

I'm pretty sure those are for a 123 odo. The failure I've always seen in the 126 ones is the plastic gears going bad..

you can kinda see which screws here,

#9 06-01-2007, 10:05 PM

ok ok I got it. whilst searching for the problem the actual gear disintegrated in 4 pieces right there. how funny. that must have been engineered like that, no question about it. like no other?
and they all **** up around 265k? just when you really want your product to be off the high end market and into the dark circuit. wow.
anyway, I need to contact odometergears.com