If your car runs fine but sets adaptation codes thinking that the wiring did something to the controller is wishfull thinking. This is a known problem and the dealers answer is straight from MB. There is even a service bulletin on the v8 models.

Hard to say from here but the reason for changing controllers on early LH and HFM cars with adaptation codes is the software. An old unit with the same number will have thensame software (unless someone has reprogrammed it). There are guys out there selling just the chip.

If the used controller fixes it nevermind, when it does not, check around for a chip built on the lastest MB software and sell me the one you don't want.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician