Here's a secrete. They will get your car from BMWFS at the auction price, which is way below your residual. My paperwork on my 2008 trade in for my 2011 showed the dealer got the car around $36,000 but it's being sold for $44,000. And they had minimal stuff to fix on my car. It was pristine.
Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."