While driving my 2000 E320, when the right front tire hits a bump, it boobles as if the ball joints are gone. I took it to a local Firestone who said they didn't see anything wrong. What would make the tire bounce like that ?

What is your question?

The front right tire bounces as if it has a bad ball joint, but was when checked by my local Firestone, they didn't see anything wrong. I saw on the internet about the spring perch. Could this be what my issue is?