I was driving my 300D through Kansas on a cross country trip once and noticed a banging noise with some scrapping sounds. I pulled over and did some checking and found all four muffler hangers were missing. Luckily a PO had installed some coat hanger wire in place of one of the hangers, so my exhaust system remained in place for the remainder of the trip. Could be something that simple. Or not. YMMV.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.