My bimmer is well serviced and carefully driven and whenever I start the car nowadays I hear a whining noise little after I start moving the car from engine that stays for a short while and get disappear after few seconds. Sound is whistling and whining mix together. It doesn't come after that during whole drive and comes only once after the car start moving. Though it doesn't bother me much, but better ask and see the issue in case if I can fix the bigger problem in advance. Thanks guys, have a great week ahead.