The tie rods are advisable to replace as a unit per each side. They typically need doing every 100K or so.

I have never replaced an idler arm on a Mercedes that I can remember and I have had about 30 benzes over the years, mostly with lots of miles on them.

I would ask him if my idler actually wiggles or if he is suggesting it because on most cars they wiggle at this mileage.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.