Hello,
I just changed my transmission filter after 273,000km. The pan screws all came off easily except the rear one. I had to loosen off (and almost completely remove) the transmission mount to get to the bolt head. This added about 2 hours to the job (had to support the rear of the transmission before removing the mount).
The mistake I made, was forgetting about the amount of oil left in the filter and it ended up all over me and the floor.
Otherwise it worked out fine. The vehicle certainly goes better with the new oil. After many weeks discussons with the dealer mechanics and reading many Landy Zone forum experiences, I concluded Dexron III was the appropriate oil to use on my vehicle (1995 TDI Disco Auto).
Jason