Is the oil under coming from under the drivers side bumper? Their is an oil cooler up their the crimps rot out. New lines cost $351 for my SDL.

Well any dealer that says a diesel MB does not leak oil is full of s&^t. I'm sorry but I have yet to see an old German car that does not leak something. Well unless someone has went through it. Also any dealer that uses "like new" is full of crap. Sounds like you got a good one, as long as the driveline is strong and the body is in good shape everything else is pretty cheap.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200