Ignition does not work 3.0 tdi 2008

Dear friends of the commuting guide, with my well-kept and unproblematic Phaeton the ignition no longer works: -doors and tailgate open and it also locks, -interior light and door display in the cockpit go, -Navi unit lights up, -Zündschloss can be rotated with both keys and it buzzes with the right and left turn, -batteries have 12,2V and 12,9V, -timers do not rotate and without ignition a -reading about OBD is not possible. Neither with the ignition It can still be started with the start button (Keyless-go). There is enough diesel in the tank, it hasn’t rained (controllers down) and I drove it without any problems the day before. Has someone already fixed a advice or such a problem?