I need a ball joing on my 1991 300D. It has 81k on it. New England roads finally killed one ball joint, and I have been told it is easier to just have the whole control arm changed out, which has new bushing and the ball joint itself.

My question is, should I have both changed, L and R while they are in there? Is this more efficient to do this- i.e. is there a labor savings to do both? Thanks friends. John Peterson

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1994 E420 43k (pickup, solid)
1990 300D 2.5 127k (sold) (now driven by friend)
1991 300D 2.5 73k (sold) (incredible car)