Had the same front end problem on my last two cars and both times it turned out to be worn sway bar bushings. You could see some rusty stuff coming from around the bushings. I know rust from rubber? No it was from the bar. BTW the metal on both bars was also worn some.
Good Luck

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Ricali

03 C240 4matic wagon
95 300E 234,000
7 prior 240;s 5 still going
81 300sd gone
65 230sl gone
49 Studebaker Champion
90BMW convert.167,000
60 Dodge D-100