Hello, I have a 2012 Panamera Turbo S and recently the sport exhaust vales have been giving me trouble the past few days. Initially when I start up the car the valves remain open then shut off after a few seconds as a part of standard procedure the car does. When I press the exhaust button in the center console the valves remain shut, and there is no light that appears on the button after I've pressed it. I have a bidirectional scanner and could not open the valves that way either. Would make me think that it would be the actuators however the other day it worked perfectly normal, after even giving me trouble that day before yesterday. If anyone has any insight or experienced this problem I would appreciate it. Thanks in advance!