Car Audio/Alarms/UConnect/Navigation
Hi Everybody,
I'm not entirely sure how to word this, let alone search for it, so forgive me if it's a common issue.
Couple years back, I had an aftermarket Pioneer deck with a PAC SWI-PS and C2R-CHY4 installed in my 2005 300c. Over the years, the function of the steerwheel controls has...