Hi. Ok so I have this same problem. Battery is 7 months old. Started with a tailgate "pushing" to open but the lock jammed. Tailgate warning light on the dash. Now my tailgate is used twice a day generally so I get it if the lock needs replacing, its well used! Friday last week I came out to a dead battery (after the tailgate issue had been there for a few days). I boosted the battery and the car started ok, and the tailgate cleared. Used the car Sunday (yesterday) and the tailgate worked great 3 times, then wouldn't unlock again. Put the battery on charge overnight but still the same issue. Battery reads 12.4v with the car off, but charger takes hours to bring the battery up so not discounting that. Cannot yet manage to open the tailgate manually through the circular hole. Where do you aim it when you inset the screwdriver? I cycle to work so not sure if the car will start when I get to it today, but I carry a booster. How the hell do you disconnect the ground on the battery as its all the way back there!?
