inconsistent

I've never reset my trip meter since the car was new, and it's always been less than a mile difference to the total for the car. I had the Brabus D6S fitted, and when I filled up yesterday (440 miles later) I noticed that the trip is now ~20 miles less than the total for the car - that's...

I've noticed that the fuel gauge on my recently acquired C250Td is very erratic to say the least. When you fill the tank, the needle does'nt move off full for a good 70-80 miles. However, once it does move it flies down. then sometimes it appears to stay at one level for 50 miles, and then...