Got 97 Renualt Megane 1600cc the key blip won't open car, so therefore won't take immobiliser off. Put new batteries in key still nowt, also the other day the yellow box did flash on dash, and wipers and indicators didnt work, charged battery and all's ok. apart from blip and when undo car with key it don't open fully no central locking.Won't can i try? done batteries in key looked at fuses?