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Why does the Mercedes fuel gauge suddenly stop displaying?

2 Answers

LaRebecca

07/29/25 4:06am

Generally, when a Mercedes fuel gauge suddenly stops displaying, it is often due to the loss of the fuel level sensor signal in the fuel tank. The reasons for this situation include: damage to the fuel level sensor; software or hardware failure inside the fuel control computer; or a short circuit in the wiring harness of the fuel control computer or fuel level sensor. Here is some additional information: 1. Fuel gauge sensor failure: The issue could also be caused by a malfunctioning fuel float (fuel gauge sensor). The fuel gauge relies on the fuel float to detect the fuel level, and if the detection signal is distorted, the fuel gauge may not display. 2. Problems with the fuel gauge circuit in the instrument panel: If the fuel level sensor is functioning properly, the issue might lie with the fuel gauge circuit in the instrument panel.

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ElliottDella

08/12/25 7:52am

Last week, while driving my Mercedes-Benz S-Class, I suddenly noticed the fuel gauge wasn't lighting up, which was extremely frustrating. Common causes include a faulty fuel tank sensor, which might be stuck by debris and unable to float to measure the fuel level; loose or poor contact in the dashboard wiring, leading to signal interruption; or a blown fuse. I recommend first checking the fuse box, usually located under the dashboard in the cabin, and replacing the fuse corresponding to the fuel gauge with a new one. If that doesn't work, it might be a deeper issue—don't try to fix it yourself and head straight to the 4S shop for professional inspection. A non-functional fuel gauge affects your ability to estimate refueling time, and you could risk stalling midway, which is dangerous. Always keep an eye on the remaining fuel and mileage. Regular maintenance can prevent such issues, like periodically cleaning the fuel tank to reduce dirt buildup. Ignoring such minor problems could lead to bigger troubles if they spread to the electronic systems. Safe driving is paramount—don't take chances.

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