I'm a lurker on this forum and not sure if this has been done by anyone or not; theoretically, it should be a straight swap to take an engine from an ML (with with intake and injectors), swap it into another M112 C, and you have an increase in power thanks to a bigger motor while recoding the ECU using DAS that is currently in the W202 C280 (1998-2000) for it to work with the different motor.

However, I cannot confirm this. Has anyone attempted this project before? I would think a 3.7L from an ML350 would be just as compatible as a 3.2L from an ML350.