In that case that is probably as good as it will get from trying that free, easy, quick, clean-hands trick and adding air-con and blower to steering load was just to strongly convince the very dumb computers that the battery state of charge was fine. I have no idea if all 10 fields(?) need to be populated but I did as it was easy just to change the tenth 1 to a 2. Perhaps your Car Scanner Pro can show you information to confirm the charging details have gone to a new replacement battery fitted. For the front assist unavailable have you tried turning it off via the infotainment menu, drive a short distance and then turn ignition off for a short time and then turn ignition back on and turn front assist back on via the infotainment menu and short drive back. Another form of 'turning it off and on again' and quick, easy, next to no-cost, clean-hands thing to try. Might save introducing another computer and computer programming to sort things (Car Scanner Pro, OBDEleven or others). Other than another member 'coding' my battery with OBDEleven I have never seen them so sorry I have no idea about adjustment or reset with it. I can well imagine the VW computer getting upset from a low or high voltage or having a brain-fart so just needing a programming reset without physical adjustment. Perhaps just disconnecting it (at the wire connector) for a while and reconnecting in a 'switching it off and on again' sort of way might sort it - but I don't know that for sure (and no doubt someone will say if you do that there will be consequences on the car and/or half the streetlights in Germany will go out). Perhaps the actual source of the ACC fault is elsewhere and just showing there but you have only had electronic child lock and digital radio antenna show on your Car Scanner Pro, with two computer systems, the car and the scanner, either or both could have errors presented. The scanner at least needs its program for the car to be fully up to date before use on the car and scanner batteries in reasonable state of charge. My wife's 2015 Fabia Mk3 (without ACC or cc , thank gawd) has at least twice had the front "assist" unavailable for very brief periods when my wife was of driving and I wasn't in the car, I guess the first something like a leave causing obstruction and second time, in town, my wife saw a paper bag blowing on the road, might have been coincidence or the cause.