[s-cars] Brake system/hydraulics system Warning

[Carlos Fangmeier]

Hi everybody, this is my first post to this list, I hope somebody can 
help me.

I own a audi S4 '94 and for a time ago I'm getting the Brake 
System/Hydrulic System warning. I checked both fluid levels and they are 
ok. How can I check if the "operanting pressure of hydraulic brake 
servo" (instruction manual ) is too low?
Another information about this warning, it always goes on when the 
temperature reach around 95ºC

Best regards


Carlos F.