Quote Originally Posted by DansB6 View Post
That is old practice. On a modern day German car nothing wrong with changing the transmission fluid.
There's a video on YT where a ZF engineer being interviewed said if you haven't done it by 125 or 135k (forget which it was), leave it and don't do it. ZF's recommendation for the 8 speed is to ideally change out the fluid and filter at 60-80k miles intervals.