I have not tried to see how fast my Mercs can go, but I have done the following which I am sure that all will find laughable compared to gassers.

1. 1981 300D - On several occasions I have driven this car 75-80mph on the interstate for 30-90 minute stretches. With this car's rear end gear the engine is turning pretty high, but it does not seem to mind. In fact the car is sweet at this speed.

2. 1985 300D - On one occasion I was on a stretch of interstate where I had never seen traffic move so fast I ended up going 85-90mph for 45 minutes. I got many strange looks. I believe that people could not believe such an 'old' looking car could travel at that speed.

3. 1999 E300 - I have not had it past 90, but my wife has told me that she has broke 110. It is too easy to drive this car at these speeds.