To be honest, if you're buying a car for sound, go for a Mustang or an Integra with a Mugen exhaust.
The C230 is quiet on the inside. The exhaust tone is definitely not one to wax poetic about. It's more like the rest of the car - efficient, composed, respectable.
When idling, the supercharger has a cheap, 'tinny' sound to it, which tends to make the car sound like a Hyundai (although this sound is completely inaudible in the interior). On the road, the 'tinny' sound disappears.
Contrasting the Benz with the Accord, you'll notice a world of difference:
- Solid structure of the Benz compared to relatively 'flexible' structure of Honda
- Firmer control action in the Benz, compared to very light steering, brakes, throttle, clutch, shifter in th Honda
- Much more composed ride in the Benz, compared to relatively 'bouncy' ride in the Accord (especially from the rear)
- Much better handling of the Benz, compared to the varying measures of understeer in the Honda
- More trips to the dealer for service with the Benz (even though the problems are relatively minor . . . more like annoyances), compared to the almost zero-defect delivery state of most Hondas
- More expensive aftermarket parts (and limited availability) for the Benz, compared to a massive aftermarket for Honda parts.
- Valets will park your new Benz closer to the door than they would the Honda
Both are fine cars, but for completely different reasons.