On my earlier E85 Z4 it was easy enough to just pull off the old gear knob and replace.
I have just tried the same on my E89 and the whole thing came off and all I want to change the leather end bit....
How to I pull the end bit out of the leather bag without causing any damages?
If you turn the gaiter inside out you will see a plastic bit right at the top, this clips into the gear knob, if you can wiggle the clips free the two parts come apart