hi all, has anyone encountered this problem, i have had 2012 panamera for 3 months now. done 73k mileage and good condition. i recently used the car for school run and when i took the key out of ignition the start/stop deactivation come up and the engine kept running. when i did eventually manage to turn the engine off 24 hours later the battery was dead and not enough power to turn the engine back on. AA come out and said the battery needs changing but something within the engine is holding power and draining the battery. wether that’s ignition or something within the main board. everything interiorly shuts off fine. he’s said never seen anything like it and very freaky that engine stays on after taking key out