My car does have a sunroof and the 85 mph speedometer. I am guessing my car was built towards the end of the 116's run. If Mercedes had a production cycle like the "big 3", they would stop in late spring, retool the factory and start building the next year's model in the early fall.
Some time back I was thinking of getting a Jaguar Xjs (1985 MY). While researching this car I found out they only produced about 5,000 of them that year for world production. I was just curious if the 1980 MY 300SD were produced in such low numbers.

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1980 MB 300SD
1999 VW Passat Wagon