Does anyone know what the difference is between Sachs, Boge, and Sachs-Boge brands of strut assemblies? The prices are alot different, but I am concerned about the quality of an OE strut.

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1992 400E current
1988 300E sold
1973 280C totalled
1973 280SEL never got it running
1971 250C my first love but rusted out