The dark and battery intensive season makes for a lot more desire to strengthen the battery(s) of the Phaeton externally for short-haul or low-haul drivers. It is clear to me that you need a decent charging capacity, which also provides the charging voltage for the (AGM) comfort battery. But how and where do you connect the energy dispenser correctly? The car offers some possibilities for this (also danger and error sources?) and it would be nice to know how to do it right. – K omfortbattery (back left) directly at the plus and minus pole? or – ” at the plus pole and minus over a mass point? (allegedly the on-board electronics only recognize the refresher) – connection of the charger to the socket on the center console? (which is – with me – however switched off, if the ignition is off – and which battery(s) is charged or then, if at all)? – connection to the contacts in the engine compartment? (are both batteries charged, or only the starterbatts rie, and which loading setting, AGM or normal, is to be chosen?) For me as a layman questions about questions – do the experts have mercy on themselves?