As said, my X6 50i is won't start. The starter wows for about one second and the engine won't start. I was pretty sure that the issue was a drained battery, and I recharged it. After 1h recharging, the battery recharger says that now the battery is full. Unfortunately my car still won't start. There are no error codes visible. Does anyone have any clue what might cause the problem? (Battery/Fuel pump/Alternator)?