Clunking noise that moved from right to left??? First thing I'd be suspicious of..... the sway bar!!

This is something nobody talks about replacing, but it makes sense to me - as it acts as gigantic spring that stabilizes roll from one side to another..... alot like replacing coil springs, new swaybar can drastically improve handling characteristics.

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'80 300SD/ w116
'79 240D 4-spd
'71 750cc Guzzi

previously owned:

'83 240D 4-spd
'77 280SEL 4-spd
'74 280/8
'72 250/8
'65 220Sb 4-spd
'63 220Sb 4-spd
'63 190c 4-spd
'61 220Sb 4-spd
'60 190b 4-spd