My phantom does not start sometimes. I would use my phantom once every forth night . I would switch off my battery switch when I don't use my car. The car will start straight away but sometimes when I drive to a nearby location and off the engine. It does not start after that until maybe half an hour time. I have change the battery about few months back but it still have this problem. But sometimes the car is working perfectly well.

Cars & Trucks - Rolls Royce - Phantom