I am looking at some used 2009 G6 4 door sedans and cannot find out what should come standard on the base model and the SE. I have seen a few listed but the dealers do not list the equipment very well. If I knew what is standard then at least I would be a step ahead. Is there a window sticker that would tell this? Is there any advantages of another year model over the 2009? Any problems that should know about? Any options that would be a must? I do want the V6 engine! Thank, BG