Page 40 in the 2006 X3 manual is where it says you can turn on the 3 blink turn signal feature. Dealer said his computor won't allow him to turn off the 37 degree warning, even though it says you can in the manual.

So the TCU (bluetooth unit) is replaced. Dealer returned the X3 to us today. It is spotless, waxed with somthing they put on every 6 months for 3 years. The service manager was extremely apologetic. He gave me two bottles of windshield washer concentrate (the BMW washer fluid is awesome stuff) and offered to put in a 6 disc CD changer, or an iPod adaptor for free, or to give us the 100,000 mile extended routine maintainance warranty (which we already purchased at time of sale). Wow! My wife won't give up the space in the center console for the CD changer, though that's a generous offer. I'm not gonna push it, because I respect the service manager, (and we did have the 530i as a loaner for the last 6 weeks), but I may ask if the Homelink mirror or a Sirius receiver is a possibility (since both cost less than either the exteded warranty or the CD changer).

The oil service indicator was not reset. I'm guessing we'll get another oil change in about 4500 miles and have the cabin airfilter replaced then (they didn't replace the microfilter, even though I thought they would).

Turns out the NAV was OK. They just put it in some mode and drove it in a circle 5 revolutions and recalibrated the gyros. Nice to have our X3 back. Sorry to see the 530i go back. I think one of each is a great combo to have in the garage, especially since my Probe GT is 14 yrs old this week and has 199,000 miles on it (it only has a cassette deck and no CD player!) Hope everyone is having a fine holiday season.