This is a Mercedes Benz 300SD Turbo Diesel (W116 1977-80). Contrary to commonplace V8 motors expected in these cars today, this one is somewhat unique. It features an inline 5 cylinder with the first application of a turbocharger mated to a diesel motor.
It’s my opinion that the W116 is one of the nicest bodystyles of any S-Class. Even with its DOT regulated parts it still manages to look elegant. This one is well loved and I hope its bulletproof motor keeps it going for a long time.
Seen in NE Portland