Hello Scotty . I heard a very very bad noise from engine and tire while i turn the wheel 1minute after i turn the car on and evenin low speed it had that sound. Someone told meto check the fluid of steering wheel and wheni saw it it was empty . 

Ive a audi a6 2007 2.7 fwd 178hp . Didnt know which fluid to refill in the cap of car has  a writing only mineral hydraulic oil G002000  . Someone told me to add an oil named chf 11s  ,is this for my car  i was trying to look the color i put my fingerin the hole and it was like a yellow , the oil i buy this chf 11s is green , i did fill it and it only take 100gram . Tell me if this is the good oil for my car and is this a big leak or not . I never change the oil sincei buy the car in a year ago