Unless you have a very special 380SEL, it doesn't have levelling suspension. Is there a reservoir with hydraulic fluid in the engine bay?

Lots of discussion on 126 sag in the archives. I never tire of telling folks to check the subframe mounts but a lot of people are content to put spacers in the rear springs.

Are you an allpar.com guy or did the merger mean MB and Mopar forums are now joined?

Sixto
91 300SE
87 300SDL
83 300SD