I am a new owner of a 2004 S60. I recently had some electrical issues. I received random messages. I reworked the battery connections and all seems better (I still have an SRS airbag warning). After starting the car, I hear a lot of noises I believe are the blend doors. The noise continues for several seconds. Since this car is new to me, I am not sure if this is normal. I suspect the computer does not know the correct position of the doors. Is there a calibration procedure that is needed so this does not happen every start up?