Hi, drove my f12 Few months ago Gear failure light ups and engine control system. My transmission can only shift to 1357 gears only. After i restart the car for few minutes it works again no light, i just notice its hard to start. Anybody knows whats wrong brought the car to service They told me it could be a sensor problem, It was there for few months they cant find the problem. They said it working ok. I got the car again last week. I drove it. After 30mins the gear failure lights up again. 1357 shift again. But after driving it striaght for few km. It works again, but light is still on. Tried to restart the car. I notice hard start again. Called up service again they told me it could be the battery for replacment. Bec its been 6years already. Anyone has the same experience?