It's all a test to see whether you are truly worthy of a Teutonic machine. A Nietzschean engineer, working on the principle that whatever doesn't kill you makes you stronger, realized that the incredible mechanical engineering and reliability in the rest of the car would likely turn its owner into a Southern European or British wimp unworthy of the epitomy of Aryan culture, so programmed in a repetitive failure of the heating system to test our mettle.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13