i suspect my rear springs may have sagged a bit.possibly needing replacement.does anyone know a quick and easy way to measure.BTW the manual shows a proceedure which involves some kind of protractor used on the rear suspension.what im looking for is say a measurement from the center of the rear wheel to the wheel arch.

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michael cole 1980 300SD gone now but not forgotten,87tdt,90 300te 4matic 95 e320 wagon