Chosen Solution
Occasionally my fuel gauge jumps left to right and right to left, then resets to correct position.
@lollygirl, David , Check the wiring/plug by the tank to see if loose/dirty/corroded and if able to check ground wire and loosen and retighten to make good connection, if all looks good the in tank fuel sending unit may be faulty or a bad actuator at the fuel gauge on your dash. . See links below for more info and trouble shooting ideas. Good luck. I hope this helped you out, if so let me know by pressing the helpful button. https://mercedessource.com/problems/elec… http://www.benzworld.org/forums/w126-s-s… Mercedes W123 Fuel Sending Unit Replacement
