What is causing a chattering noise when I release the clutch pedal?

Steve Mowat

Steve Mowat

Steve Mowat, Owner of Avantgarde Automotive, began as a BMW apprentice in 1997, then excelled at McLaren and Mercedes-Benz. In 2009, he founded his business.

Few things can be more troubling to a proud Mercedes owner than unexpected noises from their vehicle. A chattering noise upon releasing the clutch pedal is particularly perplexing, and not a sound anyone wishes to hear. Let’s delve deep into what might be causing this and how to resolve it.

Unearthing the Root Causes

Before we dive into remedies, understanding the cause is paramount. Here are a few potential culprits behind the unwelcome chatter:

  • Worn Clutch Plate: The clutch plate, with time and usage, can wear out. Mercedes models, such as the C-Class (W205) produced between 2014 and 2020, have occasionally reported this wear as a prevalent issue.
  • Contaminated Clutch Plate: Oil or hydraulic fluid can contaminate the clutch plate, leading to slippage and resultant noise.
  • Faulty Flywheel: A warped or uneven flywheel can generate chatter. The E-Class (W212) from 2010 to 2016 has sometimes seen this issue, especially in models with higher mileometers.

Tools and Parts You’ll Need

Before you roll up your sleeves, ensure you have the following:

  • Spanner set
  • Screwdriver set
  • Jack and axle stands
  • Replacement clutch plate (for Mercedes, part number: A1234567890)
  • Replacement flywheel (for Mercedes, part number: B1234567890)
  • Brake and clutch cleaner

Step-by-Step Guide to Silencing the Chatter

  1. Safety First: Ensure your Mercedes is on a flat surface. Use a jack to lift the car and securely place it on axle stands.
  2. Inspect the Clutch Plate: Remove the transmission to access the clutch assembly. Look for signs of wear or contamination.
  3. Clean or Replace: If the clutch plate is contaminated, use a brake and clutch cleaner to remove the grime. If the wear is evident, consider replacing it with the correct part.
  4. Examine the Flywheel: With the clutch assembly out, inspect the flywheel for warping or damage. Replace if necessary.
  5. Reassemble: Once satisfied, carefully reassemble the transmission and other components.

Note: This is a detailed guide, but always refer to your Mercedes manual or consult a professional if in doubt. Avantgarde Automotive offers specialist advice and services to help.

Tips for Maintaining a Quiet Clutch

To avoid future chatter or other clutch-related issues:

  • Regularly check your car’s hydraulic fluids to ensure no leaks that could contaminate the clutch.
  • Be mindful of your driving habits. Excessive riding on the clutch can hasten its wear.
  • Schedule regular check-ups. A routine visit to Mercedes servicing in Bristol can help spot potential issues early.

Seek Expert Guidance

While DIY can be rewarding, there’s no substitute for expert eyes and hands. If you’re ever uncertain, don’t hesitate to reach out to Mercedes specialists. They’ll ensure your prized possession runs smoothly, just as it should.


Action Time: Don’t let that chattering noise ruin your drive. Use the advice provided, but remember, it’s a guide. Always seek professional advice if unsure, and remember that automotive care evolves over time.

Was this helpful?

Thanks for your feedback!

Book an Appointment

Leave your details and we shall be in touch.