The reason that the one-touch sunroof stops 2-inches before going fully open is because Volvo has determined that is the optimal open position so that there is no wind buffeting inside the cabin of the car. You can of course open it all the way.
The reason that some Volvo's do not come with a sunroof spoiler is that Volvo was having problems with owners complaining that the spoiler was vibrating at high speed and also causing more wind buffeting inside of the cabin. This is why they removed the spoiler entirely for a time period. I am not sure, but they might have redesigned a new one and they are showing up on some 01' cars.
I hope this helps to clear up some things a little!
-Drew
The reason that some Volvo's do not come with a sunroof spoiler is that Volvo was having problems with owners complaining that the spoiler was vibrating at high speed and also causing more wind buffeting inside of the cabin. This is why they removed the spoiler entirely for a time period. I am not sure, but they might have redesigned a new one and they are showing up on some 01' cars.
I hope this helps to clear up some things a little!
-Drew