This is a job I have never had to do (did have to do a control arm bushing on my Audi), but now that I own a late model Merc will need to probably do this
so on a curse scale from Crap to F*CK! where did this fall? 
AutoZone.com | In Our Stores | Loan-A-Tool Program | Steering And Suspension
You can rent them from most autopart stores as well.Very nice! Where did you purchase the Ball Joint Removal and separator tool?
AutoZone.com | In Our Stores | Loan-A-Tool Program | Steering And Suspension