The fuel level sensor, also known as the fuel sender unit, is responsible for measuring the amount of fuel in the fuel tank and transmitting this information to the gas gauge. If the fuel level sensor is faulty, it may provide incorrect readings, leading to an inaccurate gas gauge.
2. Faulty Wiring or Connections:
Loose, corroded, or damaged wiring and connections can disrupt the communication between the fuel level sensor and the gas gauge.
3. Faulty Gas Gauge:
The gas gauge itself may be defective, causing it to display incorrect readings regardless of the actual fuel level in the tank.
4. Instrument Cluster Issues:
In some cases, the problem may lie with the instrument cluster, which houses the gas gauge. A malfunctioning instrument cluster can affect the accuracy of the gas gauge.
5. Software Issues:
Modern Mercedes vehicles may have software that controls the fuel level readings and gas gauge operation. Software bugs or glitches can sometimes lead to incorrect fuel level information being displayed.
6. Faulty Fuel Pump Assembly:
In some cases, a faulty fuel pump assembly may affect the fuel level sensor's ability to accurately measure the fuel level.
To diagnose the exact cause of the malfunction, it's advisable to consult with a qualified mechanic or dealership that has experience with Mercedes vehicles. They will be able to perform proper diagnostics to determine the root of the problem and make the necessary repairs or replacements.
