I have a great '01 E320 4matic wagon with 122k on the od. How will I know if the shocks-(struts) are worn out and need replacement? And, is it a big job, or will I be able to do it myself? Thanks for any help I can get from fellow members.

I have '97 E230 wagon, it is jumping upon passing over humps, the rear shock absorbers are worn, leaking hyraulic, any body can help on best way of replacing hydraulic shock absorber?