5x115 is the proper bolt pattern. but since it isn't as popular as the 5x114.3 there aren't as many wheel choices. in my personal experience (i have 22x9.5 sacchi w/ a 5x114.3 bolt pattern) i have had no problems running the 5x114.3 bolt pattern on my 300. there is more than 0.7 mm of play in the stock wheels so mounting them was no problem (no adapter plates needed).