Mainly wear and tear on the car over the past 4 years or so.
The throttle body sustained a fault at around 40,000 miles and was replaced under warranty.
Shock absorbers were replaced around 80 - 90,000 miles (the rear shock bump stops had disintegrated! so worthwhile check to make each year)
Wheel Bearings last around 40,000 miles and the gearbox had to be replaced recently as it developed a whining fault - it had around 100,000 miles on it - which is extremely good as the car is driven hard.
The engine has hardly seen anything replaced at all and as any VW engine seems to go on and on - although the head gasket blew around 75,000 miles.
General wear and tear items such as plug leads & the battery have been replaced. I currently use Mobil 1 15w/50w.
The coil pack went around 80,000 miles after it had been serviced - luckily I had only just driven out of the dealership when it went! I had this replaced free of charge!! wooohoo.
The front seats had to be replaced as one of the drivers seat welds had broken, these were replaced with sports seats which are far more comfortable on longer journeys.