Hi I was wondering about using the gauge check by pressing the trip buttom for 8 seconds. I noticed that on my 07 CC There is a digital speedometer readout in the lower left side of the LCD. Is their a way to turn this on? I also noticed that there is a truck with the backup sensors to. I have the RSS but I only get the beep. Is their anyway to get these two things operational? I know you can view the speed in the diagonstic test mode but I was just wondering why the digital speedo doesn't work all the time?