Just noticed that my odometer stopped working on the way home from work tonight. The speedometer is still working OK.

Would like to know what is involved to get the odometer back working again.

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2012 B Class

1981 300D - Now with greazzer

Sounds like the Pot metal gear is slipping on it`s shaft. Diesel Giant has a good how to on repairing it.

The spedometer will work, it isn`t gear driven, there is a magnet in a cup that spins that drives it.

http://www.dieselgiant.com/repairyourodometer.htm

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Interesting, Looks like quite a project. Perhaps replacing the speedo cluster may be an alternative. Or at least haveing a back-up cluster on hand once you start into it.

Thanks.

__________________
2012 B Class

1981 300D - Now with greazzer

It`s really not all that bad of a job to do. I have several spedo`s and used one for sacraficial lamb. I broke it down to the last nut and bolt, then reassembled it a few times to get it right. I replaced the one in my 240 (listed below) from a 85 mph to a 150mph. then had to reset the new spedo to the correct milage.

I think one of the pictures DG shows you will see the number wheels all together. on one end is the brass gear, then the pot metal gear that slips on the shaft. then all the number wheels. the end of the shaft is a brass bushing.

pry off the bushing, then pull out the shaft. lay out all the wheels as they come off the shaft in a row on a towel. good time to wipe off the dirt and dust from the numbers.

knurl the shaft with a pair of 6" needle nose Vice grips where the pot metal gear rides. this will give the gear something to grip on. slide the shaft in, slide on the PM gear, then slide over one of the grey cogs, then the next wheel, cog, wheel etc.... then as the last wheel is on and the shaft protrudes out the other side, tap on the brass bushing.

As you slide on the wheels, make sure you line up your current milage. then place the spedo face on to see if they line up in the window. I had them 1/2 a click down too low, and had to redo it.

If you decide to pick up a spedo from the junk yard, your differential should be a 3:46. the 300D none turbo should have this ratio. the spedo is geared to the Diff.

Here are some links that may be helpfull.

www.peachparts.com/shopforum/showthread.php?t=90607

www.peachparts.com/shopforum/showthread.php?t=116566

www.peachparts.com/shopforum/showthread.php?t=300127


Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Well, I waited to long to repair the odometer and the speedo stopped working yesterday. I am guessing it must be related but not sure I understand the connection.

Perhaps the some extra load broke the cable?

__________________
2012 B Class

1981 300D - Now with greazzer

That's the suck.

I tend to break more things that I fix, so I had these guys rebuild my broken odometer - http://www.speedometer.com/ Based on the info on their site, they can probably deal with your speedo, too.


It was about $110 with shipping (both ways) and comes with a warranty. It took about a week and 1/2 from the day I took it out to the day it went back in. Two months after and so far so good.

If you don't want to tackle it yourself, you can probably find a used one for less. I'm trying to keep my car original, so it was important for me to repair the one I had.

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1974 240D "Boldie" 170K.- New timing chain/freshly rebuilt IP/replaced valve seals/injectors/upgraded stereo/new Bilsteins with Yokohamas/fresh paint and rocker panels plus lots of welds.

I used Overseas Speedometer about a year ago for the same reasons as Dave. Good service. I was not going to throw a used one in there because I figured what ever I installed had a failure rate too. I am not going to waste my time for a couple of bucks. Plus I had accurate reflected mileage on the car and original parts. I did repaint all the needles while I had the cluster out.

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1979 240D Caledonia Green/cream gone
1982 240D stick Ivory/Palimino
1999 E300D White/grey

I had the same exact thing happen to mine about 3 years ago. 1985 300D Turbo, W123 I found a guy in CT, who is a dentist, that drills a hole and sets a pin into the gear thru the shaft. Cost $60, and that included shipping. I got SUPER FAST service, with turn-around within 24 hours. Mailed it on a Saturday and got it back on a Tuesday. Works PERFECTLY. Well worth every penny. Very impressed and it's a permanant fix guaranteed for life.

www.odometergears.com

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1984 300SD Turbo Diesel 150,000 miles

OBK member #23

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination

I have a question for any knowledgeable Mercedes owners. I have noticed on the W123 300Ds that sometimes the numbers line up perfectly, but most cars where they are claiming (very hard to believe) low miles for the years, the numbers on the odometer don't line up.

Does this mean the odometer has been tampered with? I can't imagine that Mercedes couldn't get the numbers straight from the factory?

Any input would be appreciated.

Thank You

It may be simple age damage, however it would require a certified laboratory (think FBI) for IMO a seriously questionable determination of cause.

Odometer failure is common, and a Pre Purchase Inspection should be your first step when buying one of these cars.

Instrument cluster, Odometer, Speedometer, Tachometer links

Federal Odometer Tampering Statutes


.

__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/

So are you saying if the numbers don't line up the odometer is either broke or has been tampered with?

Thanks

How did you find this dentist?

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Phrase it : Has been damaged or tampered with, and I will agree.

.

__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/

I took the whole cluster to a local shop that specializes in Mercedes odometer repair. They turned it around in a day.

At first there definitely was some misalignment in the odometer, but after ~8k miles of driving or so it has corrected itself and you really can't see any misalignment.

I would guess though that there are not many W123's that have not had the odometer fail.

__________________
2012 B Class

1981 300D - Now with greazzer