My wife and I just purchased an '05 3.0 X3.

-Can anyone lend any insight into good "break-in" practices

-Also, I noticed that it likes to shift into higher gears VERY quickly, and that you must really pushed down on the pedal to make it downshift. Has anyone else noticed this?

-Has anyone added any performance software to this vehicle? I was told that the engine may not gain measurable HP, but it will gain 'umph'. Can anyone explain this one also? I'm looking for better pedal response, not MAX HP.

Thanks,
Jude