I think I need some power steering fluid and don't know where to fill it? Is it the resevoir with the green top and labeled hydraulic? That's the only thing close that I could find. Also, is the stealership the only place to buy it? If so, that is a complete ripoff because it's 30 bucks per liter there. Thanks for the help!

 

Oh yeah, I have a 2001 A6 4.2 Quattro.

 

In my A4 it has a green cap. You can buy a small container
from a VW dealer for $11.

 

the power steering resivoir is the one located near the drivers side fender closer to the front of the car. read the cap it will say this. if it dosent do process of elimination read the other cap and it should say brake fluid. VERIFY THE CAP AND OWNERS MANUAL BEFORE ADDING ANY FLUID.