What causes the abnormal noise in GLC shock absorbers?
3 Answers
GLC shock absorber abnormal noise is caused by the sound of loose screws leading to component collisions. Below is relevant information about shock absorbers: 1. Working principle: When relative movement occurs between the frame (or body) and axle due to vibration, the piston inside the shock absorber moves up and down, causing the oil in the shock absorber chamber to repeatedly flow from one chamber to another through different pores. At this time, the friction between the pore walls and the oil, as well as the internal friction between oil molecules, creates damping force against the vibration, converting the vehicle's vibration energy into thermal energy of the oil, which is then absorbed and dissipated into the atmosphere by the shock absorber. 2. Purpose: To accelerate the attenuation of frame and body vibration and improve vehicle ride smoothness (comfort), most vehicle suspension systems are equipped with shock absorbers.
I remember experiencing shock absorber noise when driving a Mercedes-Benz GLC. That creaking sound was particularly noticeable when going over speed bumps or rough roads. At first, I thought it might be a tire issue, but as it became more frequent, I looked into it and found there are quite a few common causes. Aging of the shock absorber itself is the main reason—for example, internal hydraulic fluid leakage drying up, causing friction noise when the piston operates; or the rubber bushing at the top mount cracking, producing noise when the car jolts. It could also be due to loose spring tray connection points or unsecured screws, which rattle over bumps. My advice is not to delay—first, try to identify the source of the noise yourself (front/rear wheels or the side?). Take it to a reliable repair shop for a lift inspection; replacing the shock absorber usually solves the problem. Don’t ignore it, as it could lead to more severe suspension damage, affecting comfort and driving safety. Now, during every maintenance check, I remind the mechanic to inspect these components to avoid unexpected expenses.
GLC suspension noises often stem from several key issues. During repairs, I frequently encounter shock absorber seal aging leading to oil leakage; insufficient hydraulic oil causes internal valve plate impact noises. Cracks in the top mount bushings or thrust bearings create squeaking sounds when turning or going over bumps. Loose connecting rod bolts or deformed spring seats are also common causes. I recommend prompt inspection: lift the vehicle to check for oil stains on shocks and retighten any loose components; for serious cases, replace with genuine parts to avoid problems from inferior aftermarket components. Left untreated, this issue may compromise chassis balance and increase accident risks. During every service, I remind owners to regularly replace rubber components - though inexpensive, they have limited lifespan. Don't let minor issues escalate into major repairs; a small investment can ensure safety.
