Not much. I had the trunk wiring harness extended as it was crimping the weather stripping when closing.
Other than that, the car is perfect!
The car handles much better than the previous model. The additional power is very useful when on the highway and I haven't noticed any differences in the fuel economy from the previous model.
Very comfortable with the premium cream leather inside. Love the 4 disc CD changer in the dash!
Update on this wonderful car:
So far, it's at 64,500 miles in almost 8 years. Never left me stranded. Did have to replace the Transmissions Control Module and solenoid pack (over $700 at dealer), but other than that...it's been nothing but basic maintenance. Top still looks/works like new. Interior has held up well too.
I expect I'll be keeping this car forever at this point. Paid for, low mileage, loads of fun!