I found this article for a 126 SEC http://skinnerbox.steaky.org/Service/W123/Index/MiscRef.htm#anchor4535117
He said he left the springs in-place while replacing the rear trailing arm bushings here's a quote: All through this job you'll be moving and changing the support points for the subframe and trailing arm. Best if none of the supports is also holding the weight of the car. The spring is still there and tightly compressed, but the hydraulic strut is the limiting factor, with the car supported, if you disconnect the subframe or trailing arm, the spring can't cause the assy to sproing out of control because the strut is in it's center and will not extend beyond it's full length. This all assumes the strut is still firmly connected at the top. Is the SEC with self-leveling suspension that different from my SD it would be unsafe to do it this way? Russ H.
