Sashak87

Hi people

just started having trouble with my fuel gauge. Basicly one minuite it shows the tank as completely empty with no reserve light, then full, then 1/4 etc etc and never settles on a level. I have no idea how much fuel I have in my tank and its obviously causing alot of hassle. Any idea what would cause this, how much it would cost to fix?

Thanks

TJMJR

This happens on my 1998 C230 when I top-off the tank. Topped-off, the gauge will read empty until I burn a few gallons. It’s accurate from that point on. Erroneous fuel-gauge readings are often due to a bad potentiometer on the fuel-level sensor. I had the repair priced at a dealership. They quoted $400. I simply try not to top the tank off and it’s works great.

Sashak87

Mine only seems to play up on the last quarter, trouble is i want to sell it soon so i need to get it sorted. was it a MB dealership you had it priced up at?

thanks

Untertürkheim

It is most probably the fuel level sending unit.

Avid Edit

Try Techron Concentrate.
Worked for me.
Add to almost empty tank.
It took to fillups before the problem went away for me.