Metallic rattle behind headrest

[Larry C]

Has anyone noticed a metallic rattle from the area behind the driver’s rear headrest in a 718? I have a 2022 CGTS 4.0. The weather has recently warmed up and I’ve noticed an irritating metallic rattle / squeak noice from the area directly behind my headrest. It seems to becoming from the brushed aluminum stabilizer bar (or whatever it’s called) that is just behind the headrests and about three feet long.

I took the car to the dealership and went for a drive with the shop foreman. He immediately identified the noice as coming from the bar and said they will tighten it up and add some felt padding. The car goes into the shop Thursday morning.

Does anyone know what the bar is called and what it’s function is? I’m assuming it attaches to the chassis to increase torsional rigidity but I am not sure.