audi s4 b6 avant tiptronic ....power steering

[tramper39]

Hello folks , my s4 has thrown all the power steering fluid out all over the drive while ticking over on sunday its lost it from underneath somewhere didnt have time to have a look just stopped it locked it up went inside and sobbed . Has anybody any suggestions as to what its likely to be ? any ideas of cost ? ( please be gentle i am 48 and my heart isnt what it used to be so break it gently )