Why is the Mercedes-Benz car constantly making noise?
2 Answers
Here are the reasons why a Mercedes-Benz car may constantly make noise: 1. Normal noise: Due to the direct injection engine, the fuel injection pressure is more than ten times that of a regular engine. When the fuel injector operates under high pressure, it produces vibrations, resulting in a ticking sound from the engine. This is a normal condition. 2. Abnormal noise: The engine mount rubber may be aging or loose. The engine mount rubber is the rubber block placed between the engine and the frame, primarily to reduce the vibration and cushioning during engine operation, and to secure the engine. If the engine mount rubber becomes aged or loose, it can cause the engine to shake, and in severe cases, produce a 'ticking' noise. In such cases, the engine mount rubber needs to be replaced.
My Mercedes-Benz C-Class at home has been running for almost five years, and I often encounter such sound issues. Usually, the continuous sound is the Mercedes intelligent system reminding you that something wasn't done correctly, such as the door not being closed tightly or the seatbelt not being fastened properly. I've experienced the alarm going off incessantly because I didn't close the trunk properly. Sometimes, if the key battery is running low, the car might beep. Engine faults or brake system issues are even more dangerous, and the dashboard will light up with a red warning. Ignoring it for a long time might drain the car's battery. I suggest you quickly check the door handles and seatbelts first. If the sound persists, it's best to take the car to a professional repair shop for a diagnostic check. Mercedes sensors are highly sensitive, and the slightest oversight can trigger an alarm.
