Hi, thanks for the feedback, are there any markings and/or signs on the seats themselves that would indicate the "active" function?There were like 5 different combinations of seats, Standard (Sport) and Comfort. Then climate controlled or not (only on Comfort), then active bolster or not. But yes the sport seats did have active bolsters available, 2 of mine have that. but one has the M embossed head rest the other doesn't. I think it may be a difference of Merino vs standard leather. I have not looked and compared that closely and all 4 of mine were different colors anyways. Good luck trying to figure out the matrix.