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.

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1993 320TE M104
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past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
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"music and women I cannot but give way to, whatever my business" -Pepys

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).

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89 300te 222,222
92 300e 190,000

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