Inspect all the tie rods, pitman and idler arm, and the whole steering setup in general. If you don't find the slop there, it'll be the steering gear, or the steering column flex discs.

If somebody drove the car for any length of time with a front end vibration, chances are the steering gear is worn out. Seems to happen pretty quick from what I've seen.

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition