i'm kinda noobish when it comes to AC and vacum, it's my first merc, and my first car with AC :-) I got the haynes DIY manual for it, but it doesnt say to much about AC and faultfinding :-) It's kinda hot from middle of the "scroller" and all the way to hot, cant say i can feel any diff from middle to very hot, but on the "white" area it's a mix, but the "cold" feels just like the outside air... If i wanna check the AC comp how do i go around doing that... And i cant feel any diff with EC on or off running AC on cold air :-)