I'm estimating but not guessing. Yes, I did have it done this past February. A local indy did the work and after consulting the incoice, the bushings were $42 each and labor was $59 each. From what I understand, once the accumulators and upper bushings have been replaced they should be good for another 100-150k miles.

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1996 SL320 97K miles
1996 C220 130k miles
1992 500SEL 170k miles <---sold
1986 300E 216k miles <---sold