My xdrive48i had ad.... And my X5m (or the damper) has it... But my xdrive35i sport pack doesnt have it and it feels like there is more body flex and squeaks/rattles. I fixed about 85% of it by putting pads and black sponges... Now the rubber part on the door is squeaking. I drove my friends Xdrive50i with sport pack and ad... It was perfect..