The central locking can be intermittent. Especially if the unit in the door has got wet.
Door alignment has a major impact on noise. My series 3 didn't suffer from the wind noise, just water ingress. My series 4 suffers from the wind noise and is at the factory at the moment having the door adjusted along with some upgrades.
As Asbo says, rack up the miles, discover all the little glitches that can then be resolved and have fun. Put 22,000 in a year on the S3 and just shy of 30,000 on the S4 in 9 months of driving. Looking forward to possibly being the first to roll over 100,000 miles in an Aero!
