Hey Speed, don't panic yet. This happened to me and the dealership had to bring in a mechanic from Benz to finally fix mine. It was a temperature sensor...they had my car for a week. Their top mechanic, whom I know, does a lot of Viper work, couldn't figure it out...he thought what the others thought. Brought in the German mech, it was fixed. Same guy told me to bring it back to him when the warranty runs out, and he would tune it for me...got to like the Benz people...Doc
PS...the sensor was telling the motor it was still cold...so it wouldn't engage SC....so they told me...it runs better than ever now....Doc