Using the part number, my MB parts list states a list, wholesale and "cost" at $30.50

Not sure why the list, wholesale and cost is the same (first time I have seen that) but the price at the dealer for this item is not bad.

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84 300DT Puke Yellow. Totalled after 438,000
84 300DT Orient Red. 169,000 (actual mileage may vary)
2002 Explorer EB (wife's)