There's a section that tames the exhaust note, removing it let's the exhaust sing away. A very common mod with the 6.2l AMGs, though I didn't know they fitted them to the smaller engines
In terms of noise, the improvement is a nice deep yet throaty roar but if you're driving economically/normally it's not intrusive/just a low rumble.
Pics for reference, on the left is the resonator on the right is the cross pipe delete...
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If you've had a car with a modified exhaust in the past, you may find that at times it's a bit annoying, e.g. there'll be a drone when cruising on the motorway, or you can't do anywhere without grabbing attention, the resonator delete seems to allow best of both worlds. Fun and noise when wanted, quiet and refined when needed...
Personally with a turbo aspirated car, I'd be looking to get the turbo singing instead...