Clunking sound when taking foot off brakes

What is your question?

Getting loud thumping or clunking sound from front end towards the bottom when I take my foot off brake after I was at a complete stop get same sound if I brake hard. If I brake gently no thumping when I take foot off brake

What makes this problem better or worse?

Braking hard thumping sound louder when releasing brake

How long has your 2002 Audi A6 Quattro had this problem?

6 weeks