Hi all

Thank you for allowing me on this forum
I live in the UK and own a 2001 C class 240.

There is a sharp knocking /slapping sound that has developed whilst the car is under heavy braking. This seems to come from around the drivers side engine area but I maybe wrong.

I have checked the wheels and tryes all seems fine, there are no loose bits hanging in the engine bay.

A local non mercedes garage tested it and says its the ABS mechanism failed.
The car brakes fine.
The sound is intermittent.
This weekend though after a three days of heavy rainfall, the BAS brake assist light has now come on and I am worried this is something big!!!

Any ideas on what this could be?

Thanks you in advance

Worried C class driver!