what causes the knocking sound in my car? what do you recommend?

What is your question?

I have a 2007 C230 and there's this knocking sound coming out of the passenger side and I'm having trouble figuring out what it is. most of the time, i would hear the knocking sound when i press down on the breaks (coming to a complete stop) and when i go over road bumps i would hear a loud knock coming out of the front right side of my car. sometimes i would hear it when i turn my steering wheel all the way to one side. I took it to a couple of mechanics and no one could figure out what the problem is. some people recommended that i change my sway bar link. so i went ahead and replaced the sway bar link on the right side but that didn't fix the problem. i would really appreciate if someone could help me with this