I have a set of genuine Audi new style S-Line 5 spoke alloys that came of A4 2008/9 model, they are 18" 8J with 47 offset with 245/40/18 tyres. I was advised by Audi dealer they would fit my A6 2.7 TDI Quattro 2006 before I purchased them.As I was about to change the existing 17" standard alloys for these new 18" wheels I found out there is play in the centre around the hub bore so I was worried about possible vibration at high speeds due to the wheel being centered on the bolts rather than the hub so decided to hold the fire.Does anyone know if Audi sell centre rings / adaptors to make these wheels compatible with A6? Any info on this would be greatly appreciated.