Thanks Kirk. I think the procedure is similar with the e39, which I did a few years ago. New fluid > old fluid in my books anyways. And close to 100 k miles I think is still OK. This is the recommended ATF change interval for ZF trannies in N America (as published in some owners manuals). Funny how ZF recommends 100 k Km, which is 60 k miles......
I believe the people who had issues after an ATF change, screwed things up by either using the wrong ATF, or the wrong fill procedure. Some catastrophic tranny failures were caused by using a cheap non-OEM filter element (usually ZF uses "Filtran").
Thanks