My megane is the 1.6dci GT-line with stop start 2012 with 120,000 miles. The original battery was starting to fade and I got the battery low start engine message on the dash display. Purchased a direct like for like AGM replacement from Halfords and fitted it no problem. However I now have an orange warning on the dash saying CHECK VEHICLE followed by CHECK STOP & START. Needless to say the stop start is not active and the red light remains on the disable stop start switch. I guess I've been a bit of a dummy here and not followed a correct procedure. Everything else is working fine. Can anyone advise best course of rectification? I understand the software probably needs to be linked to the new battery but how? Many thanks Tony.