The fuel gauge on my '91 300d when full, will only go up about 1/2 way. Once the fuel starts coming down below that, it's accurate. It just won't go all the way to full. How can I fix this?
Thanks

jeff

Replace the sending unit. Straight diesel is a perfect inviroment for bacteria to form. So it cloggs up the sending unit, and the sending unit is an enclosed tube like the size of a paper towel roll. You can take it out and take it apart to clean it, or just replace it. You will need a 46mm socket. If I remember right, the unit is under the first aid kit box. If you start having fuel starvation problems, I would reccomend taking the car to a shop that can top the tank with gas and let it sit overnight then draining it. That will clear the tank up and with new filters you will be happy.

I took the sender out and apart. The inside center rod had rust on it. I used my Rotozip on it with a fine sanding tool, got that off, and now, all is well! A one hour job at the most, even for a lightweight like me!!

1991 300d, 90k