Component description of the fuel level sensor - GF47.10-P-2010CY

MODEL 204.0 with ENGINE 272.911 up to Model Year 8

MODEL 204.0/2 with ENGINE 272.921 up to Model Year 8

MODEL 204.0/2 with ENGINE 272.947 up to Model Year 8

MODEL 204.0 with ENGINE 272.948 up to Model Year 8

MODEL 204.0/2 with ENGINE 272.961 up to Model Year 8

MODEL 204.0 with ENGINE 272.971 up to Model Year 8

Location

Fig 1: Identifying Left And Right Fuel Level Indicator Sensor

Courtesy of MERCEDES-BENZ USA

One fuel level sensor is mounted in each fuel tank chamber.

Design

The fuel level sensor consists of:

Lever
Float
Double potentiometer (two sliding contacts)

Both sliding contacts of the double potentiometer are switched in parallel.

Function

The float changes the position of the lever (with the double potentiometer) in line with the fuel level. This changes the resistance value of the double potentiometer and thereby influences the output voltage, which is a measure for the fuel level.

Voltage signals from both fuel level sensors are transmitted separately to the rear SAM control unit with fuse and relay module (N10/2) which processes the signals accordingly and transmits them to the instrument cluster (A1) via the interior CAN (CAN B).