Ok, I've read a lot of post that said not to change the fluid. I have 110k miles on my 2000 ML430. I think the transmission cooler lines might be leaking just a little bit... I can see the lines are a little wet, but not enough to drip onto the ground.

I want to make sure there is indeed no Torque Converter drain on a 2000 ML430? Anyone knows? Also, if no TC drain, how much trans fluid do I need to buy if I am replacing the line and draining the trans fluid?

I just don't want to buy 8 litres or fluid and only using 4 litres...

By the way, how much are the transmission cooler lines anyways?