i'm interested in buying this 735i i saw but i told the seller i want to know how much it's going to cost to get it fixed none of the auto climate control features seem to work. i think it's just one chip or computer thing that controls it all. what my question is it common for climate control to go out on this car and is it just one thing to replace and how much is it and where i can buy it.(pardon my bad grammer). if you know where i can order the parts then e-mail me the links and awnsers to my questions thankx.