OM642 350CDI Noise while accelerating…

Hello Starfriends, I hope you can help me. Have the following problem with my W164 350CDI BJ 2011, when speeding up and turning off, in working warm condition, between 1400-2500 u/min strange and unhealthy noises from the engine compartment (rat, clack). Good to hear between 30-80km/h in the 2nd to 4th gear! With a recording from the engine compartment and a link at youtube with the same symptoms! Was already teny times at MB, but the guys could not help yet!!! thanks for your supporthttps://youtu.be/x4YEiJQBLdQ