Seems like everytime i take my car to a scheduled maintenance, the ball joint need to be tightened or replaced.

Is this an ongoing problem with all 1997 C36's? or even all C-classes? Or is it just me. I don;t drive the car all that hard. Regular driving i guess. Definitealy no wild cornerings and i try to avoid pot holes. (not that there are many in Toronto)

Any info would be appreciated.