1984 Mercedes 300D Euro Spec
My fuel gauge for the past few days has showed I only have a 1/4 of a tank left so I went to fill it up today. But it only held 10.4 gallons. I had put about 11-12 gallons in it about 2 weeks ago to fill it up and the gauge that time showed about half a tank. Both times after I filled it up the needle went to full. Could this be a problem with the sending unit or a voltage problem?