Mysterious Clicking in Your CLS55? Here’s What That Noise Might Be

If you own a Mercedes CLS55 AMG (or an E55 with the same drivetrain), you might have noticed an unsettling sound lately. One owner recently reported a loud clicking noise coming from what they believe is the driveshaft. The issue started suddenly about three days ago and only happens intermittently, making it tough to track down.

A short video clip posted online shows the noise in action, and the owner is asking for help: Could this be a flex joint problem? Is it the driveshaft itself?

At Boca Auto Care, we’ve seen this kind of complaint before. The intermittent nature of the clicking often points to worn-out flex discs (also called giubo joints) or a failing center support bearing. These components connect the transmission to the driveshaft and absorb vibration.

When they start to crack or separate, you’ll hear a rhythmic clicking or thumping, especially during acceleration or when the drivetrain is under load. The sound can come and go depending on temperature, humidity, or how the car is driven.

It’s also worth checking the driveshaft’s universal joints and the differential mounts. A loose bolt or a failing CV joint can mimic driveshaft noise. The best way to diagnose it is to get the car on a lift and inspect the drivetrain while it’s under load. If you’re in the Boca Raton area, bring your CLS55 or E55 to us.

We’ll pinpoint the source and get you back on the road quietly. Don’t let that clicking turn into a costly repair.