pinging

I’ve had this sort of pinging/ringing noise when accelerating under load. Cannot really hear it when in neutral only when I gear I was able to get a video left foot on brake and accelerating, any clue what it could be? Thought maybe chain but mechanic said chain was fine.

Hi All Apologies for long winded chronological list below.....Effectively car shaking when idle, especially at cold, awful clatter accelerating between 1500-2000 rpm in any gear ... Details of all work I've done so far .. rang a Mercedes Independent specialist today May 4th 2023 Hopefully they...

Hi all, I drive a 2013 W204 C220 CDI. Been hearing a slight very quiet rattling sound during acceleration for a little while now but haven’t had time to take it anywhere to get looked at. Just today I popped the hood and took off the engine cover and I’m hearing metallic tinny rattle. From what...