What Causes the Chassis Noise in Mercedes-Benz W222?
2 Answers
Mercedes-Benz W222 chassis noise reasons are as follows: Loose chassis screws: It is necessary to tighten each screw of the chassis one by one. Checking all chassis screws is also a must-do during every maintenance. Applying chassis armor spray can also help prevent screws from loosening. Noise from chassis accessories: Such as loose oil pipes, improperly secured wiring harnesses, or loose spare tire fixing screws, which can be resolved by tightening. Noise from engine/transmission guard plate: This situation is quite common, especially with aftermarket guard plates. It is likely due to improper installation or loose screws, requiring re-tightening. Aging or loose ball joints: Such as lower arm ball joints or steering tie rod ball joints, which require replacement of the relevant parts.
When my Mercedes-Benz S-Class chassis makes abnormal noises, I suspect it might be an issue with the suspension system. For example, air suspension leaks can cause squeaking or clunking sounds while driving, especially noticeable when going over speed bumps. Worn-out steering components like tie rod ends may also produce squeaking noises during turns. I've checked the wheel bearings—if they're worn, you'll hear a continuous humming sound. Loose chassis bolts or aged bushings are common culprits, causing rattling noises over bumps. I recommend first testing on flat roads to locate the noise source (front or rear wheels), then promptly visit a professional shop for a diagnostic scan—Mercedes' electronic systems are complex, so avoid DIY disassembly. Safety first—address any issues early.
