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

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

Instagram: @maximed93

You cannot just swap them, it will have to be flashed or virginized

__________________
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.

This is awful news. Hav you had experience with ECU repair places?

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

Instagram: @maximed93

You might want to take a look at their services:





https://www.pressertech.com/mercedes-ecm-repair-eis-repair-mercedes-ecu-repair/

__________________
96 E300d

Go to a tuner and just go standalone?

__________________
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.

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