The GLC body style offers plenty of space within its cabin, so it’s down to whether you need the load space of the full SUV body or can sacrifice a few cubic litres in the pursuit of style. For the record, the SUV has 550 litres of bootspace which extends to 1600 with the seats down, while the Coupé manages 500 and 1400 litres respectively. Both models have an AMG body styling package with vertical vanes on the grille, larger front apron air intakes, Multibeam headlights and running boards.​

The GLC 63 runs on 19” AMG alloys while the 63 S takes it up a size to 20”. Inside, there’s a 12.3” digital instrument cluster, ambient lighting package, AMG multifunction steering wheel and memory package. The GLC 63 S adds AMG performance seats and steering wheel in Nappa leather and DINAMICA microfibre.


All models feature the MBUX multimedia system that can be controlled with ‘Hey Mercedes’ voice activation as well as touch input. Standard features include augmented reality navigation, wireless charging, smartphone integration and Dynamic Select drive modes with a choice of Comfort, Eco, Sport, Sport+ and Individual. The GLC 63 S specification includes AMG Track Pace, an iOS smartphone app that records vehicle-specific data including lap times.


The Mercedes-AMG GLC 63 and 63 S are kept on track thanks to an unobtrusive Electronic Stability Programme (ESP) with Curve Dynamic Assist and Crosswind Assist. Other safety features include Attention Assist, which monitors the driver’s behaviour for tiredness, Collision Prevention Assist Plus, which can autonomously trigger braking in certain circumstances, and Adaptive Brake system with Hold function and dry braking in the wet.


Immensely fast, or stupendously fast? With their shared specification of 4.0-litre turbo V8 engine, 9-speed MCT gearbox and 4MATIC+ all-wheel drive transmission, both models offer breath-taking performance. The 476hp GLC 63 4MATIC+ Coupé blasts from 0-62mph in 4.0 seconds, the 510hp 63 S does it in just 3.8s. Top speed for the GLC 63 is governed to 155, but the GLC 63 S with its AMG Drivers’ Package can run all the way to 174mph.​

These figures are identical for both SUV and Coupé body styles (rather counter intuitively, the Coupé weighs 5kg more than the SUV). Both the GLC 63 and GLC 63 S feature air suspension on front and rear axles with continuously adjustable damping plus the AMG electronic rear axle differential lock.