Hit me up if you need a new one (or new used) a buddy of mine has a smashed A6 2.7T that he is parting out. I can ask him for the part if you wish

 

Hey Bob,

If the tank has a big leak he should not spill washer fluid all over himself.

All My Audi's have the headlight washers bypassed. They are a PITA

 

When he removes the tank there will be fluid at the bottom of the tank that will come rushing out of the hole from which the windshield pump was removed. It sounds more like he does have a crack high up in the tank since the low fluid light is not coming on. In which case there will be even more fuild coming out of the pump holes.

Bob

 

Bob,

Your right - the crack is most likely high up so the light stays on.. I was hopeing he would not wet his pants when removing the tank....

 

Back to the OP:

Back in Febr 07, the job was around $ 127 at a Firestone shop (I found this in the car's maint records):

with the info from hcaudikeed - just the tank being $ 110, I bet you look at over $ 200 easily if you go to the dealer.