Check the spec is correct, and all standard and optional equipment is present.
Check for Paint Defects, and small or even Large dents. I had a dent inside the rear Door near the hinge, didn't notice it for a couple of weeks, then had a bit of a battle to get it sorted.
Check the info read out is in Miles, and English, tho it is quite good fun to have it in Italian!.
Check the Aircon is reading in Centigrade, or Farenhight if you prefer. This is a dealer only adjustment, you can not do this one yourself.
Check the wiring loom is secured under the dash on the drivers side. Mine landed on my foot first time out. The newer Cars have a re-designed fuse box cover which doesn't break when you close the drivers door now.
Check your Tyre Pressure's they often pump them right up to 36-37PSI, it makes the ride even harsher, 32PSI is better.
Make sure the PDI stamp is done, and if it's not coming thro the UK Dealer network make sure the service book is present and in English.