[steve 300c]

After reading through this entire thread again ive com to a conclusion that if you want to super size your wheeel package be prepaired to be brushed off by the dealer as far as any warrnty work goes. If you have a car crazy service manager he/she will probally bend over backwards to try and help you but to still rember not all are like this. I happen to have one of these managers at my dealership and he told me that going big isnt a problem and even gave me the max wheel allowance for the "C". He also stated the the main problem with the wheel tollerance was the wear of the tires and not so much the accutual wheel its self. He said the if the differance between the front and rear were basicly noticable and left unattended "not rotated or replaced" it would infact affect the transmission during shifting due to the ESP sensors.
To this day iam still not sure why this affects it so. but according to DC it does.