http://www.peachparts.com/shopforum/showthread.php?t=268050&highlight=replacing+ball+joints

http://www.peachparts.com/shopforum/showthread.php?t=264434&highlight=rear+end+unstable

FYI,

Creaks that are affected by water could be ball joints...

look at the boots on the ball joints, if they are torn then you found your problem. this is a very serious one and i would not delay it if it is the case ...

good luck

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1993 300E, 2.8 M104 .....