Good afternoon, I own a 1989 420 SEL and need to replace the rear springs,only because teh left rear seems to be sagging, I'm a bit confused, upon lookinb and pricing the springs they make mentin of different size shims What,m if any size do I replace??? Why? Should I replace with same OEM shims ??
I am also going to replace all four shocks, cars has 117600 miles, rides OK but corners sloppy. Any help would be appreciared. Thanks in advanced,

Tim