2021 Mercedes-AMG A 45 S track review

Mercedes-AMG has rolled out a semi-slick tyre option for the A45 S and CLA45 S to improve track performance – is it any good?

We put our resident race driver, Chris Atkinson, in charge of a Mercedes-AMG A45 S to find out what it's like as a track car.

Wondering how to contain the world's most powerful four-cylinder engine? Give it to the engineers at AMG. But don't be fooled into thinking the new A45 S is tame...