Not sure how to do it, does it appear my car needs a software update?

Hello, I own a 2015 200 S with 9k miles. Driving home from work Wednesday at highway speeds I got a message that said "Service Transmission" as well as a check engine light. When I tried to accelerate it would not shift out of 8th gear and the paddle shifters would not shift either. I came...

Upgraded my uconnect from the 5 inch touchscreen to the 8.4 inch, works perfectly now I just don't know what to do with the old radio, I tried Craigslist and ebay with no luck, any suggestions??

On a 2012 Limited convertible, top stuck between up and down. Error message says "convertible top not secured". Switch is dead any suggestions. Cargo shield is up and locked.

Since I haven't seen one yet I figured I would start a thread for people with questions or ideas to do with modifying our 200s' audio systems. As of the time of this post I have installed an Alpine 1100w amp, 2 Ten inch Type R subs, and a PAC In line converter. I have also replaced my door...