Well, I finally purchased a 1998 E300 TD with 31,000 miles in wonderful condition. Over the weekend, I decided to fill the tank, since I was approaching a 1/4 tank. I added roughly 14 gallons, which brought the indicator to full. I assumed 3/4 of a 21 gallon tank would be roughly 15 gallons. I reset the odometer and recorded the purchase into my logbook.

I have driven roughly 200 miles and the indicator is already pointing to a half tank. I was expecting better milage. 10 gallons * 30 mpg should be closer to 300 miles at half tank.

I have read there are some known problems with a fuel level sensor. Could this be my problem and if so, how do I rectify? Is this something that can be done by someone with limited mechanical skills, or do I need to get a dealer / local shop involved?

I will know better once I refill the tank and measure the actual mpg, but I am nervous because I just purchased the vehicle and there is no warranty since it is past the 4 year mark.

Any hints will be appreciated.

SpannMan