Thanks for your help so far guys, it's been great. I have one other question though, and it should be an easy one. My red indicator light for the auto function stays on all the time on my 98 C280, but it doesn't say auto on the AC display. If I hit the auto button it functions like it should with auto on and the auto logo appears on the AC display, and if I hit it again, it cuts off like it should, but the red light stays on. Just want to know if this normal, or if anybody else has had this problem. Thanks for any help you can offer.