When I try to add gas to my tank, the nozzle clicks right off as though it was full. I've tried several different pumps, as well as several different stations, just to make sure that the nozzles weren't the culprit. I know that my gas gauge is working, because I was able to add around 1.5 gallons and it moved up the appropriate amount. I also religiously reset my trip odometer every time I fill up, and I still have over 300 miles on it. The car is a 2000 C230 Kompressor. Anyone have any ideas? I'd hate to have to spend a couple of thousand at a dealer for a new tank.