Didn't see this posted (or couldn't find it) but I just went to www.cars.com and you can build the X5 and X6 M and see invoice.

The sun shades, even if only manual, are a MUST when having kids. We had them on our former Cayenne Turbo S and the kids loved them. Especially when the sun is shining bright and from a certain angle, it can get very annoying in the rear. Just imagine the kids are playing Gameboy or watching a movie (entertainment system or even iPod touch), the sun can ruin the whole experience.

With kids, the sun shades are a MUST have option.

This is not an obvious benefit (had them on a Mercedes and in 3 years used them once), but with kids and infants it is a must have option.