[V6-12v] Replacing brake fluid

[clive young]

Hi Guys 

Have any of you tried replacing your brake fluid? On previous cars I would "vacuum" out the brake fluid from the reservoir with a syringe taking most of the crud with it to the bottom of the reservoir , top up with new fluid and do the old foot pump techique to push the old fluid out of the lines until the clear stuff came through.
    The Audi has a small filter screen in the reservoir that I just can not remove. I suppose I could push all that old fluid through the sytem but I hate doing that if I don't have too. Is there something I am missing here ?

Any info would be helpful

Regards

Clive