I am waiting for a scene in a future The Walking Dead episode where the only car they find that fires up is an old M-B diesel. Of course, like all other vehicles, after 3 years the battery would be dead, but it could be a manual shifter on a hill (in the summer), or I understand my 1984 300D can be push-started. Gas goes bad, but not diesel as long as it doesn't get the black slime growth (from moisture).

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans