Mr. Bill, congrats on the terrific mileage. Maybe my mileage suffered a bit as my average speed was about 80-85 mph.
This is kind of an apples to oranges comparison, though, as yours is a 3.0 liter M103 and mine is a 3.2 liter M104 engine.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".