Hi all, sorry to ask this question on a Sunday. I have a 307 with a bit of a problem, the car will not start or turn over after the tailgate had been left open for a long time. The battery was flat. Removed and replaced with a new battery and tried correct procedure but still locked in economy mode. There is no fault codes showing with diagnostic. I can get the relay to click for a short time before the system then goes back to economy mode. Any help would be very much apricated.