Does it matter when I switch from Sport/Mid/Green mode to a different mode? Should the car be moving or stopped?

 

You can change on the fly; the car does not need to be stopped.

 

Yes, and don't be concerned if there is a little lurch - that is becasue the change in throttle mapping means the engine's power is different at a particular throttle position in different modes.

 

I've noticed that if I am at a light and I change from Mid to Sport the car will start to barely creep forward unless I press the brake a little harder Love that extra power!

 

Sport Mid and Green can be changed on the fly. Most aggressive to least aggressive, yea throttle position , steering, and tune changes ( i think for the noise ). You can notice the sport gives you exhaust pop much more.

 

I use Sport to merge on the interstate then shift into Green once I'm cruising.