So as title says, the fuel level in the cluster is out by about a quarter of a tank, consistently. Then the gauge stops at last quarter until your empty! I know as I just ran out on the M6!! Just bought this car so.. The fuel warning light came on, just below half a tank, so i think that was about right, just the level seems to be too high by said amount. I took out the sender and cleaned up the contacts but that hasn't changed anything. So i'm wondering if the level in the cluster needs recalibrating (if that can be done) or is faulty or the sender unit is at fault! Anyone with any experience of this? Thanks in advance.