Fuel Gauge Test
- Connect ohmmeter between terminal "G" and terminal No. 31 on fuel gauge sender. See Fig 1
. Resistance should be 2 ohms with float at "FULL" position and 70 ohms with float at "EMPTY" position. The higher the fuel level, the lower resistance will be.
- Connect ohmmeter across terminal "W" and terminal No. 31. Continuity should exist only if tank is empty (low fuel warning contacts). If sending unit is functional and wire harness is good, replace fuel gauge.
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.