My M104 is my daily summer driver. Engine wiring harness, throttle body wiring, and head gasket have been proactively replaced. The engine has otherwise not been a problem and has never left me stranded.

On the other hand, the body electronics are horrible, a never ending battle with diagnosis and repair. It's shameful that Germans, who pride themselves in engineering, can do such a horrible job with electricals. If they weren't so parochially arrogant, they could study Japanese vehicles, reverse engineer the electricals, and copy the successful designs.... maybe even improve on them.

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95 E320 Cabriolet, 169K