I have deleted both cats and resonator then changed the amg muffler to a remus one on my C32, now my exhaust note comes strange for me, if car windous are closed an air condition swiched on making hiss sound which suppresses ugly metalic part of exhaust notes, sound is good, like you drive G55 amg.
But if windous are open exhaust note comes like from lorry truck and too loud

. I think i can find a solution in resonator. but which i need to use in the aggregate with my custom exhaust to make a good deep bassy exhaust note, i do not know, remus does not provide resonator for my car. even if it does for any other models of cars.
Want to hear your adviseces.