I recently purchased an X5 and am just now noticing an A/C issue with the warmer weather. With the A/C on and the automatic button engaged, there is hot air blowing at the drivers feet while somewhat cool air is coming out the drivers vents. With the auto button disengaged, there is no heat at the drivers feet, but both heat and cold is blowing out the drivers right vent and warm air is blowing out the drivers left vent. How can this be? Please help!