My 2018 Alltrack Wolfsburg (First reg 28 Feb 201 has 50k on it and lately I've noticed that the start stop won't allow the engine to stop when at traffic lights etc. I thought this was because of driving less due to Covid19 but even doing over 90km in a day (over half hhighway running) 3 days straight it is still not allowing the engine to stop. The centre unit says "Power consumption is high" when all I have on is the HVAC on auto and the stereo. I was at the dealer for another issue and asked them to check, they said the battery is fine but "needed charging" which they put onto a fast charger for 15 min and then it allowed the stop start. I drove 70km highway home and then two days later drove to work and stop start was normal, however the following two days (with 100km each day driven) the start stop is refusing again. Surely either the battery or alternator isn't working well?