I just replaced the door pins of my sister-in-law's 2005 CLK 350. The original pins and rings are some cheap plastic parts, unworthy of a $50K car. The pins look and feel like a sheetrock wall anchor of the worst kind. Production cost maybe 10 cents or less.

What a different the chrome pins and rings make.

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1996 E320 since 1/16/08, 171K miles as of Feb 2011

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1989 300CE - R.I.P. Dec 29 2007
Other MBs (sold): 1992 300E-24 - 1979 350SLC - 1984 230E - 1990 300CE