Can someone clear up a fluid question for me?

My 355 uses Shell Donax fluid in the F1 hydraulic system. My Gallardo uses Tutela CS fluid in the eGear hydraulic system.

I'm trying to find Tutela CS as I have a small leak in an eGear line and need to replace that line. It's hard to find in the US.

I believe Shell Donax is described as an ATF fluid and I used the Mercedes ATF fluid in the Ferrari based on the advice of someone here who compared the specs. I could use that same fluid in the Lamborghini but to be honest I care a little bit more about the Lamborghini and am more cautious about mixing the fluids.

I was told by a vendor that the Audi part G052171A2 is a direct replacement for Tutela CS, but if you look at the description of that fluid, it says manual transmission oil. That can't be right.

Does anyone here know if Tutela CS is the same as Shell Donax which is essentially the same as the Mercedes fluid?

 

Nevermind. I'm just going to order the right stuff from AMH although I'm still curious about the answer.