Modern forced-induction engines have made remarkable strides in efficiency and performance, yet the introduction of the 5.5-litre twin-turbocharged V8 in the Mercedes-AMG CLS 63 S evokes a sense of cautious anticipation. The reason? It replaces the naturally aspirated 6.2-litre V8, an engine that won over enthusiasts with its raw power and distinctive character. However, the new unit not only surpasses its predecessor in terms of sheer performance but also boasts a 32% improvement in efficiency.
This powerful engine feels particularly at home in the CLS, a four-door coupé that masterfully blends luxury and performance. For those seeking additional practicality, the shooting brake variant offers a compelling alternative. Given its premium positioning, the CLS 63 S is better equipped than most to justify its formidable 576bhp output, making it an executive vehicle with genuine high-performance credentials.
Yet, brute power alone is not enough to make this model a success. For the CLS 63 S to be truly remarkable, it must strike the delicate balance between exhilarating performance and refined grand touring comfort. Achieving this equilibrium is no small feat.
2014 Facelift Enhancements
In 2014, the CLS range received a facelift, bringing subtle yet meaningful updates. These included a redesigned front grille, revised bumper, and modernised headlights, while the interior benefited from mild enhancements to refine the cabin’s premium feel.
The CLS 63 S also received a technical upgrade: a new wet-clutch version of AMG’s seven-speed automatic transmission. This modification was aimed at sharpening shift times and extracting the full performance potential of the powertrain. The result? A more responsive driving experience that enhances both acceleration and overall drivability.
Strengths and Weaknesses
Strengths:
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Outstanding engine performance
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Thrilling exhaust note
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Efficient and responsive gearbox
Weaknesses:
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High starting price
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Underwhelming standard equipment
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Firm ride quality at low speeds
A Bold Yet Familiar Design
According to Mercedes-AMG, the CLS 63 S draws styling inspiration from the SLS supercar. While certain design cues—particularly at the front—echo the high-performance flagship, the overall impression remains unmistakably that of a CLS that has undergone a dramatic transformation.
The aesthetic enhancements contribute to its bold presence without straying into excessive aggression. The test model featured the optional AMG carbon trim package, which includes carbon-fibre door mirrors and a rear diffuser. While these elements add an extra layer of visual drama, they may be an unnecessary embellishment on an already muscular and well-proportioned design.
Final Thoughts
The Mercedes-AMG CLS 63 S successfully merges high-performance engineering with executive-class refinement. The revised engine delivers exceptional power with improved efficiency, while the updated gearbox enhances driving dynamics. Despite its premium price tag and somewhat firm low-speed ride, the CLS 63 S remains an alluring choice for those seeking a performance car that does not compromise on luxury.
For enthusiasts who value both speed and sophistication, this AMG-badged coupé stands as an impressive testament to what modern performance luxury can achieve.
