Ventilation panel in the middle via RNS810 without function

Good day and hello to everyone. I’m reading with you for a long time, but I haven’t written anything myself until today, but I’ve been able to get some useful tips. For 2 years now, I’ve been allowed to call a Phaeton GP 2 from January 2010 my own. It’s a dark blue short 4-seater, 3l Diesel 4Motion,with everything you need (no TV in the back, it doesn’t need…for a big fridge in the trunk……). A really nice car…. The good one now has 160 tkm au f the clock and runs absolutely perfect. A few little things were/are unfortunately to be done (climate condensator exchanged, xenon bulbs exchanged, a heater that simply does not want to run….). Everything still to be hurt. And exactly now that it is so beautiful outside and not wet and damp at all, just the adjustment of the middle air outlet above the ZAB says goodbye. The wood cover went half up this morning, and end. Somehow the wood cover also edged up, nothing more… Air comes out, but the thing doesn’t want to move anymore…. Now my question: How can I expand the part…?? I guess the ZAB has to go out and who knows what else…. Has a guide (I can read, pictures are still beautiful ;-)…) which he can provide me?? How the side motors and apertures are to dismantle, I found, but not the great middle part. I know the much praised and well-known workshop, but these are good ones. 300 km from me…. I’m grateful for tips. I’ll probably get on to the repair as soon as it’s a little warmer outside. Thank you in advance Dirk