Any idea why my exhaust pipe hits the differential when I hit a bump making a loud "bell" sound?

I've replaced all 4 rubber donuts, then noticed the clamp by the engine was gone. replaced that, made it worse. Is there another clamp position somewhere between the engine and the muffler, or is it supposed to sway so much?
Thanks

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Paul
2004 E500 4matic; 72,000mi