I too have creaking rear struts on my 99 ML 430. My truck only has 57k on it, and the problem has been around for a few thousand miles. The dealer wanted $1100 to replace the struts, and I said no, I would do it myself (they already got me on a few other things that trip, so I thought I had paid them enough). But, I am still confused as to what in the strut can be making the noise? I would think it was a bushing or mounting point, not the actual strut. Anyone ever change out their rear struts that can give me some tips on how to do it? Also, anyone know a good place to order the new shocks/struts from?