2018 Audi S6 7.5 Cete Active Exhaust Control HELP!!

[DiamondZ]

Can't leave well enough alone!! I had to try install the Cete Active Exhaust Control, and then it happened. No dash Lights, MMI still works, all the interior lights come on, and the car seems to crank, but does not roll over. Installation was straight foward, and did't have any issues, what did I do wrong?

[widebodyfx]

CAN BUS bridge connector fully reseated? Pins are correct orange/black orange/brown?


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[Dirt]

Have you tried taking everything back to stock? Otherwise you don’t know whether to troubleshoot the module/installl or the car itself.

[MadAboutCars]

What are you gaining in the S6 from this exhaust control anyway. A quieter start, and a bit more noise in comfort mode at higher rpm. In the S6, the exhaust valves are open most of the time. They only close when in 4 cylinder mode and at high rpm in comfort mode.