The W123 chassis covers 240D's, 300D's, 300TD's, 280E's, and several other models of Mercedes coupes, sedans and wagons from model years 1977 to 1985.

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fuel gauge erratic behavior

Occasionally my fuel gauge jumps left to right and right to left, then resets to correct position.

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@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

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David will be eternally grateful.
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