There are specs for the spring height both new and acceptable. The shim is based on the spring, which is identified by a color pattern brushed on.

Being that they are out, you can check your old springs height.

Someone that I think would know, once said in a posting, that he has never seen the springs on a Mercedes need replacing. There are however body to sub-frame bushings and shims that do wear out overtime. In most cases these are the parts that effect ride height.

Don

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1980 300TD-T (82 Turbo and Trans) 159,000 Miles "Jackie-O"
1983 300SD 272,000 Miles "Aristotle"
1987 Jeep Wagoneer Limited - keeps the MB's off the ice and out of the snow
1994 BMW 530it