As far as Diesel Purge, I've never experienced anything like that. However, after the treatment, I replace the fuel filters. So, if any algae or any other foreign matter was already existing in the filters, it's possible they got plugged. But to be able to start and drive home is odd. How far was the drive home from where it stopped?

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1987 300SDL #1, 1987 300SDL #2, 1980 240D, 1982 300SD, 1994 S350, 1990 350SDL, 1991 350SD, 1985 300D, 2005 E320CDI

Gone, but not forgotten: 1981 300SD, 1982 300SD, 1987 300SDL, 1983 300TD, 1980 300CD, 1981 300SD #2, 1987 300D, 1987 300TDT, 1980 300D