There is one idler arm and one lower control arm bushing on each side. The car has ~ 215 K miles. The indie tried the adjustment screw and all that does is make turning the steering wheel harder or easier. The play I would say is about 10 - 15 degree of play.

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2010 ML350 Bluetec
2012 Mustang Convertible

check the steering damper and see if t needs replacing. It is possible that the steering damper may have went bad.

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http://i148.photobucket.com/albums/s...titled-1-3.jpg
1981 300d

There is a flex joint (coupling) in the steering column that could be contributing to the problem.

http://catalog.peachparts.com/ShopByVehicle.epc?q=1982-Mercedes--Benz-300d-Steering&yearid=1982%40%401982&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6190%3AMBC%7C1504%3AED%7C10000135%40%40300D&catid=241580%40%40Steering&subcatid=241649@@Steering+Coupling&mode=PA

I doubt that he adjusted it correctly. To take away slack on a mb you must turn the adjusting screw anticlockwise.

Its pretty simple, loosten the locking nug (19mm) and use an allen 6 or 8mm to move the adjusting screw.

My 83 has over 330k on it and its adjusted to no slack whatever.

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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.