Very controversial, I have done much research on it, or the best I can find. I agree, and most will agree that the trans fluid like any other "Will" break down over time.
Changing the filter wouldn't be such a bad idea and keeping the old fluid and possibly adding just a little new...? The thought of a new filter would allow removal of old sludge and residual wear caused within that I have seen first hand.

I have also heard that if it isn't taken care of from the start compared to one that has, then changing the fluid while parts and fluid have broken down would be ok, however BMW strongly urges not changing the fluid or filter and also commented on potential leaks...?

I can only assume that new fluid would cause a higher pressure within the Transmission, and the springs and valves would be under a lot more stress that normal. Would that be a correct assumption?

Knowing that I have so many miles on the car, it runs outstanding even towing a Harley 1200 mile round trip once in a while. The concern is knowing what could ultimately happen much sooner then I'd like if changing the fluid at this time and stage of miles on this vehicle.

I think i'm better off by not taking any chances of changing the fluid or filter. And just leaving it alone. There's not leaks, shifts strong.

Thanks for the Input!

~Mud