In the US the E300 is limited to 130MPH for the same
reasons as the gasoline cars - our legal environment
and that the car is equipped with 'H' speed rated tires.

I ran across the European press release of the E300
turbodiesel a few years ago, at which time MB claimed
it was the fastest diesel passenger car ever built.
Unrestricted top speed is about 137MPH.

- Jim