Sorry to hear of your loss.

At the end of the day, it comes down to finances. Keeping two cars insured versus one.

If you have the finances to pay to maintain the MB immediately, Id just send it to the indy, and now you have the flexibility to use another car.

If long-term you will not be able to keep paying insurance and PM on both, then you do need to come to a decision... May be best to cut your losses and sell the MB, but recognizing that a poorer running example will be worth less.

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)