Greetings in the round of the freshling! Bernd is my name… Have there to the cracks of you a question regarding instrument cluster. Problem: expansion AI. I found and read the basic things about this here. I.e. 4 screws loosen and KI slowly pull out of his cave, turn and solve the three plugs, twice by levering the holding clamp and once pull together the two clamps of the third plug in front of it – so far so well… Now I notice a not described wired fourth part (centered on the back of the AI) – probably a … lamp? To at least two cables go to the plug, are also secured with tape against accidental release (soldered). Now I stand on the tube. Is it a light, whose socket I can possibly turn out – pull out?! The socket can not even be turned. To illustrate a few pictures: Ki from the front.