You would have to change the pan from your old engine to the replacement engine. I changed the engine on my regular W124 last year and that was plenty of work. Being you have a fourmatic, just makes for a little more work. Are you sure it needs to go. They are pretty tough on the bottom end. Maybe it needs a good head job. Is it high mileage? Has it been overheated? I really would try to find out if a head rebuild would solve your problem.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!