You're going to have to do a little more research but I thought there was a reset procedure during which the vehicle learns the parking brake position. Or maybe that was the sunroof. Or something else. I can't be sure of what I read or if it pertained to the E70. It might depend on the type of parking brake also. My X5d has a drum-in-hat style but some actuate the caliper and have to be reset when the pads are changed.

__________________
8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim