Folks,I am thinking of changing my 16' rim to a 18' M-Sports rim. Will this affect my warranty. According to AB, if I buy the rims from them, then the warranty (for related parts) will still be in place. Is this true? Or are they just trying to sell me their rims????I have gotten a quote from them....it cost me RM11800 just for 18' M Sports rims without tyres. I think it's too expensive and really tempted to just change the rims elsewhere and pay RM13k for a 19' M5 rims.Appreciate if anyone out there can give me some suggestions?RegardsRicky 