Can anyone recommend a good Chicago area stereo shop for my 07 MCS?

 

By the letter configuration, I'm guessing it's not a convertible? As far as I can tell you, I'm not sure the aftermarket world has caught up with the 07 and later MCS. I've seen a couple of them come through my shop, and the best thing so far is sat radio. I had to price out an entire radio interface for a customer, all because best buy shorted out the entire radio. Not a cheap repair...

Hope some of this helps.