What is the correct tire pressure for Mercedes GLC?
2 Answers
According to the international GBT2978-2008 standard, the recommended tire pressure for Mercedes GLC standard tires is 2.4-2.5 bar. In winter, the tire pressure should be slightly increased by about 0.2 bar based on the standard tire pressure. In summer, the tire pressure can generally be about 0.1 bar lower than the standard to prevent tire blowouts due to high temperatures. Tire pressure reset method: First, turn on the ignition, then press and hold the tire pressure monitoring reset button until you hear a "beep" sound before releasing it. The tire pressure monitoring system will then store the current normal tire pressure data, automatically clear the previous data, and finally, the dashboard warning light will turn off, indicating the tire pressure reset is complete. There are generally three reasons for abnormal tire pressure: Abnormal tire pressure: The system will alert if the pressure is generally below 1.8 bar or above 3.0 bar. In this case, tire inspection and pressure adjustment are required. Tire pressure monitoring not reset: After inflating the tires, if the tire pressure reset is not performed promptly, the tire pressure monitoring system will still record the previous data, causing the tire pressure monitoring indicator to light up. Simply performing a tire pressure reset will resolve this issue. Damaged tire pressure sensor: The tire pressure sensor, which monitors tire pressure, is directly installed inside the tire and connected to the tire inflation valve. If the sensor is damaged during driving, it will also cause the tire pressure warning light to illuminate. For sensor damage issues, the only solution is to replace it with a new component.
As a seasoned mechanic with a decade of experience, I frequently assist car owners with tire-related issues on their Mercedes-Benz GLC. The standard tire pressure varies depending on the model year and load conditions. Typically, it's indicated on the label near the driver's door. For most GLC models, the recommended cold tire pressure is around 32 psi for the front tires and 35 psi for the rear tires. If carrying heavier loads or more passengers, the rear tire pressure may need adjustment to 38 psi. Measuring tire pressure when cold is crucial, meaning the vehicle should be stationary for at least three hours before measurement for accuracy. Incorrect tire pressure has significant consequences: too low increases tire wear, fuel consumption, and the risk of blowouts; too high results in a bumpy and uncomfortable ride. I personally use a tire pressure gauge for checks and advise owners to inspect monthly, especially during seasonal changes when temperature affects tire pressure values. Always refer to the manual for accurate figures—never guess. Seasonal adjustments can improve fuel efficiency and safety, and simple maintenance can prevent major issues.
