1. Oil change is expensive but a little cost effective since you do it only every 7 K miles
2. XFIREX can hold very well in the rain...if in case it snows then I would use snow chains
3. Some can be a DIY maintenance like oil change but whatever you do, do it right and if you're not sure then go to the dealer.
4. If you're concerned about gas mileage and the cost...you need a Honda Civic for your every day car and leave your Crossfire in the garage.
5. I seldom use the FM or AM in my radio since I have my iPod to take care of it...10,000 songs should be enough for 112 miles. Cruise control indicator light is what they missed but you should know if you're in auto cruise or not anyway...you just have to get used to it.
6. Tell your wife you'll gonna have a car where others don't have and it's a Mercedes!