Some CBU models blower unit 'fail' after some time, so most of the owners change to the local units, much cooler too i suppose, as for the 3 sliders it really doesn't make a difference on our weather although one could modd to make it work especially good when you use the fan blower without AC but need air circulation from outside of car ( good when in Genting,Cameron Highlands or Melbourne),and to blow air on your feet to chase away mosquitos......:smokin:
For me i just open my rear quarter windows as i have automated window controls, no need to climb to the back to open and close it .....:rock: I'm guessing my e30 is the only one in the world that has auto rear vent windows..........:rock::rock::rock: