Check this site!
Guys, there must be 100 threads on the squeaky brakes--including the service bulletin numbers that you have to bring to your dealer.
Most Caddy dealers don't know ANYTHING about the 1, 2 or 3 XLR's they've sold, and they appreciate your telling them what to do, and where to find the help! Mine actually thanked me for telling them how to get paid for replacing my front rotors and pads
This site has been invaluable to me, I've learned things (not in the manual) like holding down the TC button for 8 seconds while stopped, to get to the 2nd level of "no traction/stabilitrak control" so that you can smoke tires and get the best 0-60 times, etc. I think the tranny actually holds the gears longer in "high performance mode" but I'm usually shifting manually, when I turn off the Stabilitrak. I thought the tires were hitting the nose/cowl when I'd floor it to pull onto a highway from a right angle (sharp right at a "T") but it turns out the Stabilitrack was choking the performance!
Do some searching under technical, and you'll be amazed at what you'll learn about your XLR!