Your local shops should have the information. I would recommend that someone that is familiar with Mercedes Benz alignments perform this task. I am speaking from experience. The shops that didn't know Mercedes didn't do it to my satisfaction.

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1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T