caf

To the original poster: Your friends are wrong when it comes to BMWs and they're wrong when it comes to Audis also. As others have said, it's the thickness that's important. I use only OEM pads and rotors and I've never had to replace rotors more than every other pad change. Same applies to BMW, and I've done a lot of brake jobs on my BMWs over the years.

There is no need to turn rotors if they are in good shape and you're not having any warping or pulsation (if I had any warping or pulsation, I would be changing the rotors out, regardless). The pads will quickly mate to the new or old rotors unless there is excessive grooving or pitting of the old rotors.

Not to be too cynical, but dealers LOVE brake jobs. Easy work, lots of profit, and most customers seem to almost expect to pay out the wazoo for German brake jobs.