Hey X'ED, here look at this, then maybe you can grasp what the issue is. This is so unbelievably f'd up, So far I have called two Mercedes Dealers to get a part number and price, so I can replace the whole board. Both put me on hold and then eventually hung up. The boys at my Chrysler dealer didn't know what I was talking about, they kept thinking I was talking about the O2 sensor. So Like GoodEnough's experience, I to have a frustrating couple of weeks. I'm starting to get a bad taste in my mouth for Chrysler.