suspension Creak
 

My 1988 Mercedes 420SEL has a creaking noise comming from the right front suspension. The noise started as a slight noise but quickly has changed into a rather embarsing creak you can hear for quite a distance. The sound is like a boat scraping against a warf, more of a metal-rubber noise than metal on metal. But, mostly loud and very offensive. I have tried lubercating the rubber bushings I can find with silicone spray with no success, I have often heard this type of noise in a number of older cars. Does anyone have suggestions? Thanks.

sounds like it could be the upper shock mount. You'll should find quite a lot of info in the search about it. I think it's a fairly easy job to replace if that's it.

As I have redone the entire suspenion on my 126 I would like to help, but Perhaps you might tell us more - like is it constant ? driving only - as opposed to getting in and out of car, during turns, hitting bumps in the road, etc. Have you considered wheel bearings ? they too "do the scrape".

I had the same thing on my 92 300e. About a month ago I made a tiny hole in the top of the rubber boot on the ball joint and injected some 30 weight oil with a plastic syringe. Immediately stopped the noxious creek. This weekend I am replacing the ball joints, but only out of "preventative maintenace" (is hasn't creeked at all since getting lubed).

suspension creak
 

The noise is present on entry to the car, when turning, when going straight and , in general, constantly whenever movement is encountered either lateral or vertical.

If it is present upon entering use a helper to try and identify the source.
I once had something similar. Turned out to be a defective bearing bracket (front subframe mount) that was only discovered when you actually touched it and felt the vibration. Good Luck