Unless you can get that car for $2k or less it isn't worth it. You can get a gas S320 with 200k less miles thats 5-7 years newer for under $10k.

So $2k+rebuilt engine would be at least $8k, and you would still have a 250k car that I'm sure needs front end work. Throw a gear box in and your up to $10k.

Its almost a parts car.

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2006 CL500
1969 280SE
2023 Ram 1500
2026 Genesis GV70
2007 Tiara 3200