I was having some back problems once so instead of doing the work myself, I took my car to Pep Boys, just down the street to install front shocks. When I got it back, it was obvious that one shock was very loose. I checked the other and it was overtorqued. I couldn't figure out how this happened until I looked at the installation instructions that came with the shocks. It had a picture of an overtorqued bolt and and undertorqued bolt. The 'mechanic' who installed the shocks apparently mistook these pictures to mean install one shock this way (overtorqued) and the other this way (undertorqued). I'm assuming the mechanic couldn't read.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13