Hi Neil... had a similar issue myself, one day all is OK, the next upon start-up I get ESC, TPMS, Adaptive Lights & Sports Diff warning lights. Checked on the forums, which suggest that maybe my battery was the culprit - which sounds plausible. Anyway, my RS5 is in with my local independent at the moment for some investigation & diagnostics, so far it's not the battery 😳