We have a 98 ml320 that was recently at dealer for a problem that was diagnosed resulted in them replacing the fuel pump. They returned vehicle to me and after @ 200 miles of driving the fuel gauge still showed full and trip computer showed miles left till empty at @ 400 miles. Also the light on dash showing low fuel never came on and we stopped and put in 18.4 gallons of gas. Could dealer have left something undone or do I check fuse box. THANKS

The problem is more than likely with your fuel sender unit. This is/was a common problem on C-classes (W202) and MLs. Do a search and you should find a good amt. of info on the topic. Remember, the C-class had similar problems, so searching for that might help too. Good luck!

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2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

The fuel level sender is part of the fuel pump. It is entirely possible (and don't ask how I know this) that the rod with the float on the end could become tangled in the fuel lines inside the tank, resulting in the float getting stuck in the "up" or full position. MB has just come out with some new updates concerning the fuel pump assembly and also some external hose changes for the ML, your dealer will probably want to do these updates now also. Bulletin was released about a week ago concerning both of these changes........Gilly