93 500sel/S500
123,500 miles

me and a (he use to work for a local owned benz repair shop) buddy are going to change out the transmission filter if i receive tommarow.

how much transmission fluid do i need?
and is there any special type or brand of fluid that i need?
is there any special tools that i need to do this???
can i put any additives such as Lucas stop slip?
is there anything else i need to know before doing this?

thanks in advance