Weird suspension/bearing noise?

[ForceIndia]

Cars a 2011 c class. Makes this sound, only when turning left. It’s sounds like metal on metal, and it’s intermittent. Can go several days without hearing it. Only noticed after having a wheel changed (the offside rear, which is where the noise seems to come from).
Any ideas?

 

[Bluebeard]

I’ve had it before where the tyre fitter clipped the brake dust plate behind the disc when they were putting the wheel on and it was rubbing on the disc.
Wheel off and a tap back with a plastic hammer and life was good again.

 

[Martin_172]

Likely as dan says above, he will have caught the back plate when removing or fitting the wheel, on the OSR when turning LEFT a tiny bit of play in the wheel bearing is just enough for it to catch, probably find its touching the disk at the bottom you should be able to see it if you look underneath