metal tapping sound while idling and after turn off engine
I drive a 2018 S63 coupe (m177)
I get a metal tapping sound while idling and engine turned off also
I suspect it’s coming from the front brake disk area.
It’s coming from front left and right
(Check video 00:04:40)
Any idea why ? It started 3 weeks ago
Last edited by chamoda; Mar 13, 2026 at 01:52 PM.




There's a good chance that it is coming from the expanding and contracting heat shields around the catalytic converters or less llikely, the heat shields around the brake rotors.


