Why did you have to bleed the brakes in the first place ?.Have you had the system apart for some reason or was it just because they were a bit spongy ?.Have you changed the front pads and if so what make/type did you fit.
Sorry for all the questions but if your car idle's o.k. and engine runs smooth and there are no obvious air leaks then maybe it is'nt the servo.Just trying to save you the job of changing it coz it's a pain to do !.
Is this car new to you ?.What were the brakes like before you did whatever it was (if anything) that required the bleed ?.More info needed
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Iv'e never had a problem with a servo on a Golf so i'm not sure if this applies to a one but on another car i had years ago i had a similar problem and it turned out to be the one way valve on the pipe that goes from the inlet manifold to the servo.It was'nt working one way,it was leaking and allowing the vacuum to return to the inlet.I don't even know if a Golf has a one way in that pipe but i suspect it has.
