New Phaeton acquired and electronic problems

Hello everyone, my Phaeton for about 2 months is a V6 3.0 tdi. Built 03/2007. I have been able to find out for 3-4 weeks strange things about the electronics. Hope you can help me further. I have already posted one thing with the ACC. I have so far only changed the registration light on the car on LED and an MP3 player from Sololo installed. The following things are short or occur more and more often: ACC goes sometimes and sometimes not! In the on-board computer then ACC is defective. After a restart I can mostly use the ACC without restrictions again. In the morning the sliding roof went up once again from alone up to half. The bulb for standing light is defective. Today I have become dark on the highway once the ZAB for 10 seconds and has recharged itself. What can be the cause for the problems? What can someone tell me? I am actually very satisfied with the car up to the aforementioned dropouts. Can it have something to do with the LED lighting? CAN-BUS? Would I be very happy about your help.