I just bought a 1993 300E a few months ago with 147k on it and in similar condition (looks like anyway) and paid $5800 (probably a little too much) from a local Mercedes shop/ dealer. From what I see it looks like a total loss, but I hope they repair it for you, it's a beautiful car!

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1993 300E 2.8 185k miles
2006 Mustang Convertible 4.0 Eaton Supercharged