Servus from Northern Bavaria! I’m new here among the Phaeton riders After I tested a V6 GP2, which had already convinced me of the comfort, suddenly a very well-kept V10 TDI came down from the sky, 192 Tkm, checkbook, second hand, no rust, 4 seats, long version in dark blue (in my knowledge in Luna blue). So I am very happy owner of a V10 TDI EZ 31.10.2006. That the vehicle is not fault-free was known to me, however I have the consisting e problem pushed onto the comfort battery, which may have been wrong. As can be seen in the title, an unfunctioning infotainment system bothers me. As the inclined Phaeton driver knows, it is also not possible to use the heater or general heating use. Kessy also works sporadicly, electric tailgate despite new wire harnesses. Everything is very mysterious. After some research I am on the following possible error source Defected comfort battery (quiet current of 14.7 volts) -Defected chip in the infotainment system Already I tried to charge the battery with an AGM charger, even after 16 hours of charging, the device still displays “charging”. I am a little skeptical about whether the battery will collapse under load (or peak to start the vehicle) and then only works when all capacitors have their charge as well as k have an underspense more (yes, very academic view ) I am also happy to be open for further solution advice. Thank you in advance!