Hello dear community, After about 2 months of service I ran again to my beloved Phaeton 3.0 Tdi from 2013. Unfortunately this one was completely powerless. Not even the doors could be opened by FB. Because it pressed as always, opened the trunk at the back by key and started off at the starter battery. That was all so far as it went. Car then also started again and again days later. Certain things make me stubborn. The voltmeter in the instrument panel shows despite Lan In addition, the DWA optically shows me an error (long red flashes then fast). Therefore, measured at the rear of the batteries times. Comfort battery (95aH AGM) shows 11.7 volts in retirement. Starter battery (60aH no AGM) shows about 12.7 V in a resting state. Exciting, however, this voltage collapses short-term under 9V. I find that not normal. We also seem to have too little of the 11.7 V of the comfort battery. . Unfortunately, you can’t get a muk from the heater. However, I don’t know where the power is coming from. So the question arises, do I really have 2 defective batteries at the same time? I’m looking forward to your answers. Thank you and greetings