Removal of boot trim and squeak resolution for S205 C63S estate

[Blu_Ray_UK2007]

My 2020 S205 has acquired an annoying squeak, which I have identified as originating from behind the N/S boot trim, located right behind the rear seat beneath the 3/4 panel window (circled in red). Applying pressure on it allows me to reproduce the squeak. Interestingly, when I park the vehicle with the brakes off and strike this place with my fist, the electronic handbrake engages.
I assume that electronics or a kind of sensor are concealed inside.
I am unable to determine how to detach the carpeted trim, since the clasp for the folding seat back obstructs my ability to remove the panel. I would really appreciate guidance or advice on the contents behind the panel and the procedure for its removal. A components diagram for the region would be beneficial.

[AMG33D]

Highly intriguing A few weeks ago, I test drove an E63S estate and noticed a rattling, rather than a squeak, emanating from the back, which I suspected was due to the detachable and retractable boot lip component. while I agitated and shook that component, it rattled similarly to while I was driving it. However, it seems that your squeak originates from behind that trim piece, of which I possess no knowledge about its concealed elements. Apologies

[Blu_Ray_UK2007]

Upon pressing the red region, it emits a squeaking sound, and when I strike it gently, the EPC activates. I am eager to discover what is concealed there and rectify the problem simultaneously.

[clk320x4]

https://mb-teilekatalog.info/view_GroupAction.php

[clk320x4]

Insert your vehicle here.

[Blu_Ray_UK2007]

Thank you! That is really helpful. It seems that the Keyless Go and 360-degree camera systems are present there.

[developer]

I own an S205 (C43). Upon removing the parcel shelf device, a little screw will be revealed, facilitating the detachment of the plastic trim piece that accommodates the parcel shelf tang. By elevating the rear seatbelt where it traverses the top of the seat on that side, you may also discover an additional bolt securing another plastic trim piece. Upon their removal, you will get far more access to advance the carpet ahead. It may also be necessary to detach the rear door weather seal and the plastic trim along the side of the door to completely free the carpet. I had to detach the same section on my vehicle to remove the back seat belts, and I remember that carpet piece was rather troublesome. I cannot recall what was behind it, but I will review my photographs today, and if I discover anything pertinent, I will share it. There were occasional pieces of foam that had been installed by the manufacturer, undoubtedly to reduce the squeaks.

[Blu_Ray_UK2007]

Thank you. That is really helpful. I believed that the plastic component for the roller bling needed to be removed. However, while examining the rear of the carpet trim where the clips are located, I regrettably found that I cannot use a tool to mitigate the danger of damaging the clips.

[developer]

Exercise caution with the last plastic component that forms the upper section of the boot next to the back seats. The clamps securing this component are quite rigid. Upon reflection, I believe there exists a more effective method to completely retract the carpet. Perhaps starting at the midpoint of the boot? I have never explored this path. I recall having access beneath the carpet before completely removing the plastic trim. I believe it is compressed downward from the trim above and then inward towards the boot, namely in the central region where more flexibility is seen. It should enough to provide an opening for observation and photography.