Hey all I just recently bought a 04 clk55 amg and it developed a very strange sound when slowing down, so I made a video. Around 5 seconds you can hear the noise I was going over a bumpy road which made the noise sound much worse than it is but basically I hear a knocking sound under the mid section of the car when braking. I've been searching for days and can't really find any info and would appreciate any insight on what that noise could be

 

actually the noise starts around 7 seconds

 

Alright so quick update for anyone who has this problem don't freak out just reset your tcu and you should be golden. I just reset my tcu and the noise seems to have gone away I'll know for sure when I take the car out on the open road for a day, hope its gone