I think it would be helpful for those of you who are experiencing an issue to post the following:
1. Build date
2. Do you have Sport Auto Trans (option code 2TB) or regular Steptronic?
3. Do you have the same issue when the transmission is placed in "Sport" as when it is in "Drive"?
4. Does anyone else (wife, child) use the same key / profile? Or do you each have your own?
I suspect the issue may be the adaptive transmission learning your driving style. Or it may be an engine management issue - throttle position sensors (TPI's) have been problematic in several BMW models, causing the vehicles to "bog" under acceleration.
2014 328i Sport Wagon
, Glacier / Black, ZSL, ZD2, ZD3, ZDH, ZLP, ZPP, ZTP, and H-K
2011 535xi M Sport
TiAg / Black, ZPP, ZP2, ZCV, ZCW, ZDA, 2TB, 6NR, 465, 5DL, and a Partridge in a Pear Tree
2011 X5 35D
2008 ///M3 Vert
2008 X5 3.0
2007 X5 3.0
2006 X5 3.0
2006 550iA SP
2003 540iA M-Sport