My muffler hangars on the 560SEC finally let go, on a rural highway, and the exhaust system was dragging on the ground, and the CHP stopped me, and so I had the car flatbedded to the nearest muffler shop about 10 miles away.

After TWO more replacements (of Autozone type O ring hangars) that failed catastrophically, you get wise to the fact that the square OE Mercedes Benz muffler hangars, which are very cheap, are the way to go.

In your case, I'd check them and replace them with OE right away, also

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1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ...

1995 E 420, 170k "The Red Plum" (sold)

2015 BMW 535i xdrive awd Stage 1 DINAN, 6k, <----364 hp

1967 Mercury Cougar, 49k

2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive (sold)