Did a search- no luck-

I am pretty sure my W126 needs a tranny fluid and filter change. Are these pretty straight forward, or better left for a specialist? I changed the tranny fluid and filter in my old 83' Oldsmobile 98 when I had it (about 14 years ago) and it was simple. Remove the pan, remove the old filter, then install the filter, replace the pan and fill the tranny. Is it as simple on the W126, or are there any other "steps"/precautions that have to take place?

Thanks!