If it sound that good already im sold. Im just imagining it with an aftermarket exhaust right now. This is probably one of the best sounding turbocharged four cylinders from factory besides the iconic boxter engine from subaru.
I think when Mercedes was making the CLA 45 AMg they had in mind to make an exhaust system to be semi aggressive to suit those who might not want to spend the extra money on an aftermarket exhaust. So it would meet the stand of those who want to enjoy the CLA 45 AMG right out of the box.