Creaking and groaning on turns and/or large deflections at low speed is diagnostic for bad ball joints on these cars, especially creaking, groaning, or occasionally squealing when turning the wheels. Ditto for ball joints on just about any other car I've ever worked on.

Eventually it goes away, to be replaced with rattling or "knuckling" on rough pavement and sooner or later the suspension coming apart.

Not a bad job to replace (I need to do the other side on the 300d).

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!