oh, I don't know... the 95/96/97 e series got pretty decent mileage. lower 40's I think...

tweaked I think they could get into the upper 40's low 50's... with some hypermileing techniques.
no way you're getting that in a 602.
the 606 was great. but all the EPA/and safety stuff really weighed the car down... diminished the efficiency of the newer motors...
MB does make a great car with excellent diesel efficiency... it's just illegal in the US...
the 250ED (who would name a car after an ailment...)

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!