Do all 400E's have welded in ball joints? I have heard different things and when I look online at parts alot of the sites list the ball joints seperately from the control arm. My car was built in Jan. of '92 and is vin # WDBEA34E7NB 698319. Thanks for any help.

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1992 400E current
1988 300E sold
1973 280C totalled
1973 280SEL never got it running
1971 250C my first love but rusted out