The M112 is a very tough beast. Plugs are every 100K miles. The later versions have no clutch fan (just electric ones up front), there is loads of room getting between the radiator and the components being driven by the S-belt.

They get 30 mpg on the highway in RWD 4-door E-Class sedan guise.

The only thing is you must keep them on synthetic oil, and the oil must not be changed out too late. The rings won't tolerate the lack of care. You will end up ruining the engine.

BTW, if I remember correctly, the new V6 engine is called the M272. Also, I believe the bottom end is virtually identical to the previous M112. Only thing changed is the type of piston rings MB decided to utilize. These new engines seem to have better PCV systems. And they do sound nicer.

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1987 300SDL (324000)

1986 Porsche 951 (944 Turbo) (166000)

1978 Porsche 924 (99000)

1996 Nissan Pathfinder R50 (201000)