Sorry to potentially hijack... I have searched and have found no answer yet. I am an older M3 owner and a new 2007 X5 (as of yesterday) owner and I have a couple of questions about the towing package.

First off, very clean install. It looks very nice.

Second, I want to know about the tow package.
Are there transmission or oil coolers for towing?
Are they needed?
I traded my Suburban for the X5 and I need to add the towing package to continue pulling the boat.
Would you be so kind as to list all of the parts and install things needed to add the towing package after-the-fact?
Is it more than hitch, bumper cutout and trim pieces, wiring harness, and programming?
What, exactly, is the reprogramming changing?

Thanks in advance.