Okay, if we're doing embarassing MB related moments here's mine: Driving the first leg of the journey home yesterday having just bought and collected the car it was a lovely sunny day and getting a bit warm in the cabin. I 'turned on' the A/C and was most annoyed that it didn't work. I even went so far as to text the dealer who sold me the car and had assured me that the A/C was fine. Thankfully he did have the foresight to ask "you do know that when the red light is illuminated on the A/C switch that the A/C is actually off don't you?" Oh well, I do now!