Bundt's don't fit on the later cars, the bolts are to long they tear up the rear parking brakes.

Are you sure it wasn't a 380SEL?

For $500 it might be a nice project, M116's had weak timing chains that could have snapped. Worst case you need to replace the motor.

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2006 CL500
2009 C300 4matic
1969 280SE
2023 Ram 1500
2007 Tiara 3200