130MPH in my new-to-me '94 E420 coming back from Galveston to Dallas. Only for a few minutes though.

Previous week coming home from vacation at 6AM on a Sunday morn: US70 from Denver to intersect I35 in Kansas to go to Dallas. They have re-surfaced most of US70 on this stretch. Set cruise control on 120 MPH for slightly over two hours.
John Prichard
1994 E420 46K mi
1986 300E 133K mi