2021 Mercedes-AMG GLA45 S review

There’s little doubt that when Mercedes-AMG created the world’s most powerful four-cylinder engine (internal code M139), it created an instant classic. While ripe for cramming into hot hatches, it should come as no surprise the bean counters at AMG HQ would look to amortise development costs across a broader range of product. Enter the 2021 Mercedes-AMG GLA45 S, the three-pointed star’s take on the hot performance SUV.