Someone suggested this should be posted, so it can be linked into the 'How To' sticky:

1. Connect the battery cables and tighten to 5 Nm. Ground cable must be connected last.
2. Install the battery cover and close the luggage compartment lid.
3. Start the engine and allow to idle until the engine reaches normal operating temperature.
(n.b.: when you first switch on, the display will ask you to press the brake pedal & apply the electronic handbrake, to recalibrate)
4. Switch the engine off.
5. Restart the engine and allow to idle for approximately two minutes (this will allow the ECM to learn the idle values).
6. Apply and hold the brake pedal, select drive and allow the engine to idle for a further two minutes.
7. Drive the vehicle for approximately five miles/eight kilometres of varied driving to enable the ECM to complete its learning strategy.
8. Reset the audio unit and climate control assembly to your settings.
9. Reset the door window motors (wind down & hold until there's a click, wind up & hold for another click).
10. Store your current seat positions in M1, then adjust & store any other positions you used to have.

I believe that the 5-mile drive, while recommended, is not vital - the ECM will learn the correct settings as the car is driven, even if it is not done immediately.