How to Solve the Resonance Grunting Sound During Mercedes-Benz Acceleration?
2 Answers
Solutions for the resonance grunting sound during Mercedes-Benz acceleration: 1. Address the high and low-pressure fuel lines. For the low-pressure fuel line, lift the vehicle, remove the underbody panel, and fill the fuel line channel with foam padding to dampen vibrations. 2. For the high-pressure fuel line, open the front hood, remove the air intake circulation system, loosen the screws, start the engine, observe the level of vibration, and tighten the screws while the engine is running to minimize vibration to the point of no shaking. The Mercedes-Benz B200 is a compact model under the Mercedes-Benz brand. Taking the 2021 Mercedes-Benz B-Class B180 Fashion model as an example, its body dimensions are 4423mm in length, 1796mm in width, and 1555mm in height, with a wheelbase of 2729mm. The body adopts a 5-door, 5-seat hatchback structure, and the powertrain is equipped with a 1.3L turbocharged engine paired with a 7-speed dual-clutch transmission.
Having driven a Mercedes for so many years, the most annoying thing is the buzzing resonance sound during acceleration. First, you need to identify the source of the noise. If it's coming from the engine bay, it's likely due to worn or cracked engine mounts. Last time I replaced them, the noise disappeared immediately—rubber components should be replaced every five years or so. If the noise is from the chassis, you'll need to get under the car and check if the exhaust hangers are loose; a loose exhaust pipe can cause a rumbling sound. Deformed tires or rims can also produce similar noises, especially noticeable at high speeds. Don’t overlook the driveshaft—if the center bearing is worn, it can cause severe shaking during acceleration. My advice is to take the car to a repair shop, lift it up, rev the engine, and have a mechanic use a stethoscope to inspect each part systematically. That’s the most reliable way to diagnose the issue.
