Well, I now have appointment with Mercedes of Knoxville next Tuesday. I have pulled my hair out, and so has my son I'm afraid, on the Intake air temperature sensor voltage too high code. We have checked everything and replaced the MAF and no change. I sent the ECU of to G7 computers, they fixed a hardware problem, but didn't change anything. G7 said it still could be the ECU but it tested good at their facility. G7 REFUNDED ALL MY MONEY!! I was only out shipping to them. G7 computers is a GREAT company, just wish they could have fixed my ECU. Mercedes should be able to tell me what is wrong, which I still believe to be ECU. I'll let you all know when I know. Blessings to all who commented.