Cooling fan kill my battery. My doors won't open with the remote control. My key lock left front door not working. I can't find any solution about open tailgate manually with key. I need to charge, but can't reach the battery in boot. Anyone here have a solution

damn my cooling fan kill my battery. My doors won't open with the remote control. My keylock left front door not working. I can't find any soulition about open tailgate manualer with key. I need to charge, but can't reach the battery in boot. Anyone here have a solution?