Well ;

yes and no ~ I drive both SWMBO's 240D and my 300CD long distances and the 240 always gets better mileage even if I drive the 300CD @ 60 , 60 MPH is the cut off speed for max. fuel economy in any W-123 chassis .

My 300Cd never gets 30 MPG's no matter what I do .

So , I tend to pin the throttle and tear up those long desert roads in my beloved 300CD but , in the 240 , I hold it right at 60 and routinely get 32 , occasionally 34 / 36 MPG's , always with the AC cranked up .

My brothers W-126 SD , always gets better fuel economy than I do and he's always got the car full of heavy crap . W-126's have much better aerodynamics .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better