I know this is a rather odd thing to do as the W210 ECUs are locked to the car they are installed in meaning that you can't use the ECU in another car, even if its the same model etc. The other issue is that the chip is soldered directly onto the board.

I have decided to buy a used ECU as I have decided to try something out, I know that there are a few people who can clone an ECU over by desoldering and then resoldering the chip however this will also mean that you are left in the same position as before with the chip being locked to the car.

I am wanting to have a spare ECU in case anything happens with the current one as its getting older.

I have decided to get a spare ECU, then I will be looking to desolder the stock chip and then install a socket to make it a socketed chip instead so I can swap over to a chip that is removable.

Not sure if anyone has tried this yet but I thought as a used ECU isn't exactly expensive I thought I would give it a go as I have nothing to lose!

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UK spec Mercedes W210 E300 Turbodiesel wagon - OM606.962 with 722.6 transmission - rust free!