Since many of those driving this model are MB employees (so my impression) the question is whether someone is in possession of explosion drawings or assembly instructions, which could help to expand the dashboard without damaging it to find out the causes of the annoying crackling noises. Please do not answer the workshop should, because I have tried all this already. They cover themselves in ignorance and MB itself does not want to take it under the guarantee, although In the past, there was someone in the forum called Mackhak (or similar), from whom I got such material for my W211, which helped me a lot during repairs. As I am technically well-intentioned, I dare to get the wretched tinkering under control, if I only knew how to dismantle what without damaging sensitive edges and surfaces. Does anyone have any idea how to get to such material, because that would have to happen?