I need to do this as my car has 140 00kms. But its shifting smoothly. I want to do some preventative maintenance.
I've done some research and it looks like a viable alternative to the ZF OEM LG6 fluid is
Liqui Moly ATF Top Tec 1800
The local Australian indy parts supplier is selling this with a pan kit. And its being used in other ZF boxes.
Heres the link:
http://www.liqui-moly.de/liquimoly/p...cument&land=DE
It's about half the LG6 ATF fluid cost in Australia. Might be a better bet that Castrol Transmax.
I offer no guarantees or experience though. So try it at your own risk.
I'm going to give it a go though.