General Sudden wastegate (?) rattle?

[Zacman110]

Hi all, wondering if anyone (maybe with BMW experience) has seen this before. My grenadier has developed a very loud rattle with the engine off and the ignition in “accessory”. It’s worse with the engine cold/cool and doesn’t do it 100% of the time. I’ve had a dig through the B57 (diesel) manual and a bit of a poke around and it looks like the turbo wastegate actuator is jumping back and forth by itself. Again, this is without the engine running - video and photos below. I’ll be taking to the dealer Monday for them to have a look.

 

[Zacman110]

Video of down next to turbo

 

[Zacman110]

Noise next to turbo. Again, engine is NOT running.