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  #1  
Old 03-03-2020, 05:06 AM
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W210 E300D ECU replacement

Hey everyone,

So, the persistent no top end power + CEL has been tracked down to a bad ECU. Car is a 1997 W210 E300D, so we are not buying a new ECU from Mercedes (for $1600 ), so I've found a few good used units on eBay.

The good unit I'm looking at comes with the ECU, shifter, ignition switch, and key. My question is, do I need to swap in all of these at once to make sure the car will perform correctly? Or just the ECU and key?

Or perhaps I would be better off sending the ECU out to get repaired somewhere instead of putting a good used unit in. Regardless, the car is not worth putting a brand new ECU into. I am assuming the car has a transponder key, but if I swap in the ECU it should work with the key from the donor car, no?

Sorry, I have had a lot of trouble finding info on these cars online. Kinda rare in the NA market.

Thanks,
Max

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Milan Brown 1979 240D, rebuilt OM617.952 turbo diesel, rebuilt 722.315 transmission (my only daily driver)

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Old 03-04-2020, 04:51 AM
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You cannot just swap them, it will have to be flashed or virginized
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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.
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Old 03-04-2020, 01:16 PM
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This is awful news. Hav you had experience with ECU repair places?
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Old 03-04-2020, 03:03 PM
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Quote:
Originally Posted by Maximan1 View Post
This is awful news. Hav you had experience with ECU repair places?

You might want to take a look at their services:





https://www.pressertech.com/mercedes-ecm-repair-eis-repair-mercedes-ecu-repair/
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Old 03-04-2020, 03:44 PM
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Go to a tuner and just go standalone?
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1998 Ford Escort ZX2 5 speed - 279,000 miles My Daily

1992 Mercedes 300D 2.5 202,000 - Pure junk
2000 Mercedes E320 Black - 136,000 miles - Needs repair

Don't forget to grease the screw and threads on the spring compressor.
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  #6  
Old 03-04-2020, 05:54 PM
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I am not sure if this will work for you , the ecu part numbers have to match obviously.
But you have nothing to lose , just do a bit more online searching to decide if its worth trying.
https://youtu.be/5DDj8GqDoRk

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