the auto system in the e46 and other bmws is quite impressive compared to any other car i've owned, including modern cars. it will maintain the temp, by controlling the fan location and air temp, regardless of what you do with the dial. so basically, you want the car to be 70 degrees always, but the sun is on you so it feels hot, dial the center dial to cold. now it's raining, you're wet, and it feels a little cold, turn the dial to warm, and your car stays at 70, but you can feel more comfortable. it's amazing i wish home HVAC somehow worked like this.Funny I've owned my e46 for over 3 years and never once have used the auto setting. I guess I'm a control freak.
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