What does it mean when Mercedes-Benz detects tire pressure loss?
3 Answers
When the tire pressure check warning appears on a Mercedes-Benz, it indicates there may be an issue with the tire pressure. According to the international GBT2978-2008 standard, the recommended tire pressure for standard tires is 2.4-2.5bar. In winter, the tire pressure should be slightly increased by about 0.2bar based on the standard tire pressure. In summer, the tire pressure can generally be about 0.1bar lower than the standard to prevent tire blowouts due to high temperatures. There are generally three reasons for abnormal tire pressure in Mercedes-Benz vehicles: Abnormal tire pressure: The system will usually alert when the pressure is below 1.8bar or above 3.0bar. In this case, the tires need to be checked and the pressure adjusted. Tire pressure monitoring system not reset: If the tire pressure is not reset after inflating the tires, the system will still record the previous data, causing the tire pressure monitoring indicator to light up. Simply reset the tire pressure monitoring system to resolve this issue. Damaged tire pressure sensor: The tire pressure sensor, which monitors tire pressure, is installed inside the tire and connected to the tire inflation valve. If the sensor is damaged during driving, it can also trigger the tire pressure warning light. In case of sensor damage, the only solution is to replace it with a new one.
I've also encountered the tire pressure loss warning light in my Mercedes while driving, which basically means the system detected low tire pressure. This usually happens due to slow leaks like a small nail puncture or pressure drops from sudden cold weather causing air contraction. Ignoring it carries significant risks: unstable driving, increased chance of blowouts, and higher fuel consumption. Last time it happened on the highway, I immediately slowed down and pulled into a service area to check with a tire gauge—found a tiny leak in the left rear tire. Topped it up temporarily to reach the repair shop. My advice: make it a habit to manually check pressures every 1-2 weeks, maintaining the manufacturer-recommended 32-35 psi. Keep a portable inflator in the car, and if the alert triggers, stay calm—handle it safely first, then get repairs.
As someone who frequently focuses on automotive safety, I find this warning from Mercedes-Benz to be crucial. It indicates that the pressure in one or more tires is below the standard value, as detected by the TPMS sensors. This low-pressure condition can increase the risk of tire blowouts, cause uneven tire wear, and affect braking distance, especially on slippery roads, making it even more dangerous. My advice is to immediately reduce speed and pull over to check the tire's appearance as soon as the warning appears—look for obvious deflation or foreign objects embedded in the tire. If there's no major air leakage, inflating the tire can provide temporary relief; otherwise, get it repaired promptly. Don't forget preventive measures: check tire pressure monthly, especially during seasonal changes, to avoid small issues accumulating into major hazards.
