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  #1  
Old 07-26-2008, 11:40 AM
Narcoleptic's Avatar
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Location: Crafton, TX
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240D instrument cluster interchange?

I screwed up trying to fix my odometer, and now it counts 10 miles for every one mile. The trip odometer works, but the main odometer is fast. I believe I reversed the metal gear at the end of the number wheels. Now the fuel gauge has gone dead with me installing and removing the cluster. I'm just going to start over again, what clusters interchange for a '82 240D? Would a '79 240D cluster work?
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  #2  
Old 07-26-2008, 12:44 PM
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Lightbulb

Assuming you are talking about the instrument cluster, the answer is yes. Any cluster from any W123 will work in your car. The difference, however, can be in the speedometer (max MPH & diff ratio) and silver centers or not. Since your proposed doner cluster is from another 240D, the tach issue is nonexistent.
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Old 07-26-2008, 01:28 PM
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Quote:
Originally Posted by Narcoleptic View Post
Would a '79 240D cluster work?
Yes, but water temp and oil pressure will be in US units insted of metric with the '79 gauges.
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Old 07-26-2008, 01:32 PM
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I don`t know if the 240D diff. ratio changed from yr to yr.
the gear ratio is stamped on the Diff. on the left side. scrape the grease
and grime off the lower left looking from the rear of the car.there is a
flat spot with #`s stamped. like 3:46 or what ever.

then go to your favorite JY. happy hunting.

charlie
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1) Not much power
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Anyone that thinks a 240D is slow drives too fast.

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  #5  
Old 07-26-2008, 01:48 PM
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diesel huffer
 
Join Date: Sep 2007
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Quote:
Originally Posted by 280EZRider View Post
Assuming you are talking about the instrument cluster, the answer is yes. Any cluster from any W123 will work in your car. The difference, however, can be in the speedometer (max MPH & diff ratio) and silver centers or not. Since your proposed doner cluster is from another 240D, the tach issue is nonexistent.
Speedometer inaccuracy doesn't matter to me much, I can send my current speedometer in for repair and use a inaccurate one as a backup. I have a GPS and can just correct to the right speed in my head if I don't have the GPS with me. I just mainly wanted to make sure the electrical connectors matched up. I've actually been using my GPS as an odometer, the odometer hasn't worked since I bought the car and I just now tried to fix it. What really gets me is I fixed the lights, one of my silver centers had fallen off and I reattached it, then the fuel gauge goes dead. Oh well, just my luck.

Quote:
Originally Posted by bgkast View Post
Yes, but water temp and oil pressure will be in US units insted of metric with the '79 gauges.
Then the one I'm looking at may not be a '79. It has temperature and oil pressure in metric just like my current cluster. Of course its a pull, so the year of the car it came from could have been forgotten or not known in the first place.

Quote:
Originally Posted by charmalu View Post
I don`t know if the 240D diff. ratio changed from yr to yr.
the gear ratio is stamped on the Diff. on the left side. scrape the grease
and grime off the lower left looking from the rear of the car.there is a
flat spot with #`s stamped. like 3:46 or what ever.

then go to your favorite JY. happy hunting.
Thanks, I'll go take a look at the ratio. I would go to the junkyard, but I live so far away from the nearest one with Mercedes, it would be the same price to buy one and have it shipped. The last time I went, I can't really recall any W123s with a good cluster, anyway. I put up a wanted to buy in the classifieds here.
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Old 07-26-2008, 01:49 PM
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I am almost positive all 240Ds in the W123 body came with a 3.69 rear.
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  #7  
Old 07-26-2008, 04:42 PM
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Quote:
Originally Posted by bgkast View Post
I am almost positive all 240Ds in the W123 body came with a 3.69 rear.
I think so too, autos, and manuals.
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