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Team California
Join Date: Jul 2001
Location: los angeles, CA.
Posts: 41,506
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w123 wagons have both vacuum and hydraulic systems. The rear SLS is hydraulic. Other Mercedes models, from the 1950s up to the present, have pneumatic SLS systems. They truly mix it up, in the same year you can find pneumatic SLS on one model and hydraulic on another, i.e. SL vs. S-class. An S600 has hydraulic and an S500 had pneumatic, IIRC, in the w220 line. (Early 2000s).
SLS= Self Leveling Suspension.
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Denis
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