That's nothing! My 1995 E300D got 70 mpg------coasting downhill from Tahoe.
I once drove the speed limit for a week just to see what fuel mileage I would get and it was 28.5 mpg over 350 miles. Not a really accurate test cause in my "normal" driving I consistently get 27.3 mpg.

How about the adds that say "only 258,000 miles, Just broken in!, these engines are known to last 1 million miles."

"No one in this world, so far as I know - and I have searched the records for years,
and employed agents to help me - has ever lost money by underestimating the intelligence
of the great masses of the plain people.

H. L. Mencken