Clonking sound rear BMW F11 when accelerating

[rbmm]

He Experts,

Tried it on two different fora but hopefully you guys no the answer.

For approximately a couple of months I have an extremely annoying clunking sound and feeling coming from the back of my car when accelerating. It's an BMW F11 530D production year 08/2010. Hopefully I can find the problem, although I already tried a lot of things.

The sound is the most pronounced when you accelerate with the car from standing still with the steering wheel turned completely to the left. I think I feel and hear the sound the best on the left side in the back of the car. Until now 4 different garages couldn't pin point the problem. The problem is best hearable in this movie filmed from the underside of the car pointed to the left side of the car https://photos.app.goo.gl/581yLps66VoFuuAGA

The things I have tried so far:

1) Replaced both shock absorbers (fairly expensive because they are active shocks) problem still persists

2) Replaced the 3 differential rubbers (hell of a job) rubber 11 and 8 see link https://www.realoem.com/bmw/enUS/sho...MW-530d&diagId =33_1454

3) One of the garages found a little bit of play in the central part of the right wheel of the active rear steering. The suggestions were that it could be the bearing in this axis. I placed a GoPro under the car to film this HSR system https://photos.app.goo.gl/FscAGVZm6w7A4rpB8 I don't think I can see any play in this joint as you can see in this movie.




4) The garage told me that the problem could be the ball joint number 13 https://www.realoem.com/bmw/en…1-BMW...diagId=33_1453 but that he couldn't find the play in the joint because of the pressure that the air suspensions puts on the rear axle. So I removed the air out the air suspensions and tried to find any play in the rear axle but couldn't find anything even with the air removed.

5) Checked both guibos some small hair pin tears but not as worn as the differential rubbers

6) Replaced number 10 one of the garages was thinking this was the problem. A lot of work but absolutely no change in symptoms.

Started filming again because it is such a pronounced feeling there has to be a possibility to catch it with a GoPro before replacing random things.

Number 11: These movies (https://photos.app.goo.gl/TpBHstoKKbCBbsNC6 and https://photos.app.goo.gl/Mji9pfnKnhVpZkAz8) are from bushing number 11. I replaced number 10 but was thinking that maybe there could be play in the HSR unit. You can see the working HSR unit and no play. So I can guess I can rule out is?

Number 16: These movies (https://photos.app.goo.gl/CDru9u99Yj4SiuCk6) are from number 16. There is a little bit of play but doesn’t seem to be the problem I think do you guys agree?

Number 13: These movies (https://photos.app.goo.gl/7WNfoN7PYm14AEna) are from number 13. I don’t thinks there is a lot of play here. The most interesting is that you here the sound the most pronounced in this movie (https://photos.app.goo.gl/dVqj3G8SfLNhkWQc7). The GoPro is attached to number 10 to film number 13.

Plan for now is film number 15 and number 9 although this is new because I replaced number 10.

I tried a lot of thing but the problem is still persisting. Hopefully one of the experts here has an idea how to continue from here because I am a little bit stocked.

[rbmm]

​Finally found the problem. It was a complete broken engine mount on the left front side. It felt 100% that it was coming from the back. I thought to share it with you guys maybe somebody else will be helped with the solution.