You can tell which pad you have by counting the number of "bumps" on the pad. 1=thinnest and 4=thickest.
It comes from the factory with whichever pad produces the proper ride height. Mercedes has a specific ride height spec for the US market, for example. Since springs are not exactly the same, the pad is used as a "shim" if you will, to produce the proper ride height.
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Bill Wood - Webmaster
MercedesShop.com, LLC
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