[sk546]

I think it varies, mine came on Pirelli P-Zero PZ4's (which I have found superb, especially dry grip & handling) but I think it depends on which factory it comes from and what tyre supply they are installing at the time your car is going through as I think some have had the same as me, others have had Continental and there has also been the odd Michelin mentioned too.
Its kind of a lucky dip.