I went into Diagnostics. It found the VIN and Car details - 2020 C43. Went to programming -> Control Module for Powertrain -> Coding -> View coding status
Got a list of all the options.
Found Eco Start / Stop marked with option Active.
Selected "Disabled" and clicked the Coding Button. It starts to update coding and then says coding failed with error. But no details on error or anything.
Any idea why it would fail?