What's The Most Useless Feature On Your Car?

Yesterday's QOTD dealt with the fact that like Leon, cars are getting larger. And they probably ain't going to stop. Besides the bloat due to perceived safety, a good chunk of you felt cars are packing on the pounds because of more and more junk features. Why have one sunroof, when you can have two? My peeve for today: auto-dimming mirrors. Are we that lazy? Also, do you know that these things leak? And, in the case of Acura TLs, frigging explode? The chemicals used to make the mirrors dim all on their own tend to pretty toxic, too. Mercury anyone? End rant. You?