I hate those piece of crap-lookin' suction cup sunshades you put on the rear window of the car to keep the kid from baking. If I wanted to roll with Pooh, I'd strap him to the grille, and if Safety 1st wants to roll with me, they can cut me a check. I was going to do some digging, hoping to find a cleanly designed--or better yet, cleanly designed AND custom-sized to my window--source for a rear window shade, when my father-in-law brought out the brochure for the BMW 7-series.
After recounting the scandalous debut of the latest redesign--the junk on the trunk [since toned down] and the iDrive user interface [six clicks to turn on the radio, etc.]--I settled into the glossy goodness. While contemplating the possibility of being allowed to special order green metallic with blue leather, I saw it. Them. Power rear- and side-window shades, and the sides are fitted in two pieces, even. Sunshade paradise.
Oddly, though, the power sunshades are only standard equipment on one BMW model: the 12-cylinder, 438-hp 760Li. Obviously, this is the car BMW intends for young families. Sensibly priced--with a few other goodies thrown in--at around $130,000. On other 7-series models, the shades are a $795 option.
For families on a budget, the compromises are harsh, so go with the 760Li except in the most extreme circumstances: 3- and 5-series wagons offer only manually operated side shades ($250), while the sedans split the difference with power-rear and manual-side shades ($575). The only option for the X3 is tinted rear privacy glass ($350). The X5 is an SUV, about which, nothing further [no offense, Josh!]