If I had the 175 tires that were recommended for the car . . . I would have gotten 40 mpg. However, with the 195 tires, I got 37. I personally didn't notice the diff from 37 to 40 since the car I gave up to own the 190D only got 25. I was ecstatic first fill up!!!! And I had almost no trouble, and almost no breakdowns in 7 years.

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1983 300D, the "Avocado"
1976 240D, 4-spd the "Pumpkin", SOLD to Pierre
1984 190D, 2.2L, 5-spd, my intro to MBZ diesels, crashed into in 2002