Please tell me what it could be? Car has only 49k.This is connection the shaft of the rear.
Thanks
Tom

What kind of noise?
From where exactly?
What you have there in the picture is the entrance to the Haldex coupling. Generation 3 of Haldex coupling.
The black cylindrical object is the Haldex electrical pump/motor and the dotted box (with 2 connectors, one going to the pump) is the Haldex ECU.

It is hum, sough like a bearing in the wheel.

Could be this:
https://www.freel2.com/gallery/albums/userpics/11383/LTB00342.pdf

Thanks very much

Hmmmm, I might quote that when I take mine back for the rumbling sound when changing down from 4th to 3rd!

Thanks Alex

Any gear's down-change generates a reverse torque.
Accompanying this hardware (bearing) change, there is a software update which address the reverse torque limitation inside Haldex clutch to reduce the bearing's static load. So in your case too, this could solve the problem.
But because the noise is already heard, then the bearing must be changed too. It could already be a goner.

Thanks again Alex, going arrange another meeting with the service dept tomorrow.