My Z4 30i auto 2003 plate starts beeping when the temperature hits 3.0.degrees and below. any ideas and is this normal? also on the odd occasion, usually in the middle of the night outside my caravan, the alarm goes off (in a low tone) and the indicator lights begin to flash. This can be stopped by opening the car with the fob, but when locked, it begins again? i end up leaving the car unlocked! any ideas pls!