i am sorry to disagree Needswing but they do fit. there are over 20 conversions done in Germany alone and many in the USA. I am in the middle of a M113 Mercedes s500 engine conversion in my n/a manual x/f. There is some changes to the wiring, exhaust manifolds, different radiator fan system and the ECU is the biggest change. A lot of the items from the M112 engine are interchangeable as the engine is only a cylinder on each side bigger.