Removal of the boot trim and addressing the squeak in the S205 C63S estate

[MercedesMan98]

My 2020 S205 has acquired a bothersome squeak, which I have identified as originating from behind the near-side boot trim, located directly behind the rear seat beneath the quarter panel window (circled in red). Applying pressure on it allows me to reproduce the squeak. Interestingly, when I park the vehicle with the brakes disengaged, striking this location with my fist triggers the electronic handbrake.
I assume that electronics or some 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 schematic of the components for the region would be beneficial.

[generic_user2]

Highly intriguing Several 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. When I agitated and shook that component, it produced a rattling sound similar to what I experienced while driving. However, it seems that your squeak originates from behind that trim piece, of which I possess no knowledge about its concealed elements. Apologies

[MercedesMan98]

When I apply pressure on the red spot, it emits a squeaking sound, and when I tap it gently, the EPC activates. I am eager to discover what is concealed there and rectify the problem simultaneously.

[sherlockHOME]

https://mb-teilekatalog.info/view_Group ... 0&group=82

[MercedesMan98]

Thank you very much! This is quite beneficial. It seems that the Keyless Go and 360-degree camera systems are present there.

[jameswright77]

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 have much enhanced 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 remove the same section on my vehicle to detach the back seat belts, and that carpet piece was very challenging. 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.

[MercedesMan98]

Thank you. That is really helpful. I believed that the plastic component for the roller bling needed to be detached, and online, I saw the rear of the carpet trim where the clips are located; however, I am unable to insert a tool there to mitigate the danger of damaging the clips.

[jameswright77]

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 very 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 to the area under the carpet before completely removing all the plastic trim. I believe it is compressed downward from the trim above and then inward toward the boot, namely in the central region where more flexibility occurs. It should enough to provide an opening for observation and photography.

[MercedesMan98]