Jorgen,
My 1981 240GL B21A (2.1 litre carburettor) runs 350 km's with a full tank. I
must say the CO is a bit on the high %.
(My 1973 144DL B20A automatic with new engine (with slightly larger valve's)
and "new" carburettor offers me almost 400Km's with a full tank.)
To be honnest with you, the mileage give me a headache every time I take
the trip to the gasstation, but then again I love it.
Prices over here in The Netherlands for gasoline are skyhigh since the US
tried to covert Iraq to whatever it will become.
Cheers,
Martijn