2009 S550 4-Matic.

Clunk/creak noise from the front underfloor area when the vehicle accelerates/decelerates.

Video and audio of the noise here:-


Please help me, it's driving me crazy.

Sounds like a mount, possible tranny mount.

Thanks.

And you are correct sir!

Took it to my dealer and they replaced the mounts and all is now quiet.

Thank you, much appreciated.

My pleasure! Happy to point you in the right direction. Happy motoring!