Quite= quiet? Drove a Mercedes gullwing "many" years ago. You couldn't hear any noise outside, like it was soundproof - and soooooo smooth. It is the FINEST car I've driven, by far.
Drive over in France and Switzerland, and they let you air it out, and most are doing, even in the slow lanes, 130 km/hr.Much better than the QEW.
Yep, had one. only thing wrong was the lousy brakes.
'57 gull wing....