Squeaky noise on suspension
 

I have a 99 E 430 that in the mornings makes a squeaky noise hen passing over speed bumps in my neighborhood. At the dealer they replaced some bushings,the rack & pinion and plates.The only front suspension parts that have not been replaced are the shocks and springs. Any ideas?

I had a squeeking noise in the left front suspension. I narrowed it to the shock. I took the shock out, squirted some rubber lube on the top and bottom rubber mounts and the noise went away.