The most common reason for a sudden empty fuel gauge reading in a Mercedes in the UAE is a failure of the fuel level sensor, often due to the sensor's float arm sticking or the sensor itself corroding from fuel contamination. In GCC-spec models like the Mercedes GLC or E-Class, this is frequently exacerbated by inconsistent fuel quality or sediment in the tank. According to RTA Dubai's vehicle inspection data, fuel system electrical faults are a noted issue in aging luxury vehicles. The MOI UAE also highlights the risks of driving with faulty gauges on high-speed corridors like the Dubai-Abu Dhabi highway. The typical solution is replacing the entire fuel pump sending unit module, a common repair in Dubai and Sharjah workshops costing between AED 1,200 to AED 2,500 for parts and labor, depending on the model.
A full diagnosis should start with checking for fault codes using an advanced scanner capable of reading Mercedes-specific modules, not just generic OBD-II. The average fuel economy for a Mercedes C 300 in UAE city traffic is around 8.5 km/l using Super 98. Driving with a faulty gauge can lead to unexpected breakdowns, which is a significant safety hazard during summer temperatures above 45°C. Ignoring the problem and relying on the trip computer is not a safe long-term strategy. The annual cost of a sensor failure, when considered as part of total ownership, adds a negligible amount per kilometer but is critical for reliability. Always use high-quality fuel (Super 98 is recommended) to minimize tank contamination, which is a primary cause of sensor malfunction in our region.
