Thanks for asking my advice.
But as usual it comes with plus.
I think any good quality brake fluid that meets dot 4 and manufacturers requirements is OK by me.
I am not a Mercedes parts fanatic, I go for the after market but with careful choices,
I go for the Mercedes parts makers, but with out the star mark on them.
I go for Bosch on electronic parts, Febi on fluids, Bilstien struts. Etc.
As long and it mixes with the existing fluid/
I also have used Castrol dot 3-4 with no problems.
You mentioned that you have posted it in R129.
( That's us.)
I wonder where else have you posted it in, may be in one of the P#$% sites? Haha.
You bad boy you.
I would not install the silicone stuff in............
It is OK for fun clutches, tits and nipples.
( Oops, did I misspell something? )
But I will keep it away from ABS and the suspension mechanics.
Like msbarsi and Chris have said, I go along with them.