It's always been a general failure for me too. I've pretty well given up on it. They should know this by the usage #'s.
Ubuntu/Linux user.

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Retired Marine Engineer
2005 E320 CDI
1987 300 Turbo Diesel @ 300,000 kM going
1974 240 D 300,K Miles when given away gone
1970 200 D gone
1969 190 D gone