Just bought an 83 300D, first MB, first diesel. Learned a lot from this forum before buying, thanks to all the archived good advice on this board.

So I think the speedo is around 7-8 mph high (reads 70, highway speed trap radar sign says 63). I believe it, as when I was holding 70 indicated on the Interstate, I was passed like I was standing still. Had similar readings from three different signs.

I was told by a mechanic that the tranny has been replaced, by one that had been factory remanufactured. Could that end of the speedo be the problem?

It runs around 3000 rpm at (as I recall) 75 indicated. Does anybody have a table or other data on revs vs. speed ratios?

Thanks again....