When the suspension travels, the rear end of my 98 E300 squeeks. I replaced the shocks because they were shot but that didn't solve the problem. Oddly it was quiet for a day. It is both sides and I can push down on the car and get the noise. How do I trouble shoot it or is it likely to be one bushing?

Is there a 'How To' for fixing the proposed problem?

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03 SLK320
98 E300TD 320k Miles
75 914
02 Suburban