Just fixed mine on 2006 W22. After messing around trying to fix it I cut the purple wire just in front of the gas tank, then cut it just forward of the last connected before it disappeared over the transmission into a bundle of a boatload of wiring. Jumped a piece of wire Between the two and Wala problem solved. There were a few spots I couldnít follow the harness in between so I figured there must be open or something there. I was able to see above the tank to trace that harness to be sure I was going after the right wires. Two black one gray which is the power for the pump and the purple which is the signal wire.