I was quoted $500 labor alone to install two bilsteins (with my parts) on a 1985 190D. I did the job myself in 3 hours total (first time , too) with a floor jack. Oh, yeah, Bilsteins cost me $99 each on line (free shipping).

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1985 190D 2.2l Sold-to Brother-in-law
1996 Mustang 3.8l -"thinks it's a sports car"
1988 Grand Wagoneer - Sold (good home)
1995 Grand Cherokee Ltd -"What was I thinking??!!"