At which level should the hydraulic fluid be in the reservoir?

[coupegt]

Yeah, probably stupid question , but im just confused.

When reading in the manual for the Audi Coupe type 89 it shows a picture of the filler cap with a dipstick with a min/max marking.

My newly bought S2 does not have a dipstick attached to the cap, and there's no visible marking on the reservoir it self. The S2 attachment manual mentions nothing of hydraulic fluid.

Was reading this guide on how to flush/clean the fluid (planning on doing very soon) http://www.20v.org/pentosin.htm and it seems like you should just fill the reservoir to the top, but this is not normal as for the other Audi's i've owned.

So is the solution just to fill it all the way up, and could a low level give the (!) warning at startup after left overnight, or is this the "bomb" loosing pressure?

[S2 Ant]

I think that a low level would give that warning yes. Also check the connection on the cap to ensure its clean etc.

On the side of the resevoir there are marks for min and max.

To test the bomb after the engine has been running count how many times you can pump the brake pedal before it goes hard. ooo er mrs

[jameswkr]

If the reservoir is too full, you will have hydraulic oil everywhere if you do the bomb test. The level should be mid way between the marks having run the engine with the wheels in the straight ahead position for about 2 min.

[Erikb]

The warning light will not blink that fast. I had it once, it was leaken on a lose nut on the top, the pump was already screaming before the warning light appeared.

[coupegt]

hmm, think ive been looking and looking, but im still not seeing any marks, but will have another look.