That is just stupid fast for a production car. But it would be interesting to see how the engine responds to the modifications.You got that right.
I find that with a car that's classified as "fast", 12 seconds is in the range of a good 1/4 mile time, anything less than that will make it seem like less of a fast and sporty car.
Can't wait to see tuners get CLA45 AMG's up to 10 seconds