HELP.. wheel & tire size fitment 245/45/18
 

I became a proud owner of a 2004 A6, 3.0L.....But the wheels & tires that came with the car sucks, it is 205/55/16, so i have decided to upgrade to a 18" and found a local selling a set of wheels & tires 245/45/18......So i need your advice, if this is going to fit the front wheel well or i mean it won't have problems while turning ???? and also the total height of the wheels are are higher than 225/40/18...
Anyway any advice for not going with this set ????