Supposed to be 2-2.5 gallons. Drive the car and when the light comes on, fill up and see how many gallons it takes. that wil lgive yo anidea of how many gallons you have left when the light comes on. We reset the trip odometer when the light comes on and figure we have about 50 miles to go. If your screen is partially blocked, due to age and debriss in the tank, you may have less.

Dave

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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car