From £69,1259
More complex C63 S seems at odds with previous versions but retains an engine that embodies the pure essence of AMG

What is it?

Line four of the technical specification for this facelifted Mercedes-AMG C63 S is peculiar. It simply states ‘503bhp at 5500-6250rpm’, which is no more than you got in the old Mercedes-AMG C63 S.

Hang on a second. Power – specifically, more power than the outgoing model – is AMG’s oldest, dearest friend. So what's going on?

It’s possible that the German power wars are finally drawing to a close. More probable is that giving the C-Class any more clout would result in it treading on the toes of the mighty Mercedes-AMG E 63 in terms of power-to-weight and performance, and today’s strict model hierarchies simply won’t permit this.

Or perhaps Mercedes has decided that 503bhp and 516lb ft are enough for a junior saloon and has instead trained its expertise on making such explosive force more usable in the real world.

The truth is somewhere between those second and third scenarios. In any case, no rival punched harder than the C63 S when it launched in 2015 and three years later, even after the arrival of a new B9-generation Audi RS4 Avant, the Ferrari-engined Alfa Romeo Giulia Quadrifoglio and a BMW M3 CS honed to supreme heights, this is still the case.

So, what has changed? Little in terms of chassis hardware. Both the C63 and C63 S continue to use a wet-sumped 4.0-litre twin-turbocharged petrol V8 and multi-link suspension with adaptive dampers and steel springs. Both also get an e-differential previously reserved for the S, although the more expensive car now also benefits from dynamic engine mounts that are said to improve steering feel and response.

Things aren’t nearly so straightforward when it comes to the software. In fact, C63 S ownership now seems a voyage of discovery where the ultimate destination is a distant realm in which you’re not constantly tempted to tinker with the electronic chassis settings.

Mercedes’ familiar Dynamic Select programme remains, with modes ranging from Slippery through Comfort, Sport, Sport+ and Race. These alter engine and transmission response, steering weight, the firmness of the damping and the all-important exhaust tone.

Additionally, there's an AMG Dynamics programme that optimises (or otherwise, as we shall see) traction using the car’s ESP co-ordinated with a brake-based torque vectoring system. There are modes for this, too. Unambiguously named, they range from Basic through Advanced to Pro and finally Master, which programmes the differential to lock up early and aggressively.

And you can't miss the new AMG Traction Control system. Gone are the days when such software was either on or off, perhaps with a third option yielding a smidgen of slip but nothing potentially calamitous. Long gone. This C63 S has a nine-stage setup borrowed from the GT R supercar, which itself uses a derivation of a system found in Mercedes' GT3 racers. Alterations are made using a digital rotary dial on the steering wheel, which looks slick but feels as though you might accidentally knock it off. 

In short, a car whose colossal appeal always sat atop relatively simple pleasures now seems to be an extraordinarily complicated device.   

Back to top

C63s 0536g

What's it like?

An aural phenomenon? You might even wonder how the thing meets statutory noise limits. Even at idle, the eight-cylinder woofle escaping the four exhaust tips is so dense that you can almost see it. This is the essence of AMG, a central factor in the decision to buy a GT R instead of the equivalent supercar from Porsche and McLaren, and yet here it is in a junior saloon. The noise is glorious – the best at this level. You'll laugh like a fool.

But it isn’t mandatory to have the Performance exhaust activated. Closing the system’s three flaps via a switch on the transmission tunnel sedates the V8. It’s still up there, not too far ahead of your kneecaps, lurking and far from silent, but it doesn't drone at a cruise. 

Put some miles under the wheels and you'll also notice less evidence of the coarse ride quality that has, in the past, threatened to undermine the C63 S's status as the lavish super-saloon option. On the spectrum of body control versus refinement, the needle still rests firmly in favour of the former, as it should, but the suspension no longer labours cat's eyes, road corrugations and the like quite as stubbornly. And the body control really is excellent in light of this, being closely metered out by steel springs (no air here yet) and adaptive dampers but never crashing. This car still can’t match the M3 Competition for outright composure, but then the BMW can’t match the ambience of its compatriot. It was ever thus. 

Back to top

Maybe the fun now feels a tad more prescriptive in the Mercedes, though. Netflix subscribers addled by the selection of films at their fingertips will sympathise with C63 S owners. You question whether a fractionally better combination of the electronic settings might exist for the precise conditions at hand. You must then probe away at the limits of adhesion to ascertain the ramifications of your selection and how tame, or otherwise, the chassis is in that particular state. In fairness, with a bit of familiarity, the nine-stage traction control is a useful tool when you're sight-reading wet roads and so on, and it allows the driver to more confidently lean on a chassis that doesn't develop quite as much grip as some rivals.

Or you can deactivate the traction control entirely, set the Dynamics programme to Master, with the differential tightly wound, and live on your wits. The rear axle can break away rather decisively in this setting, but you wouldn't call it snappy. Working a chassis this balanced with a glorious surfeit of torque is heaven, in fact. The process just isn't as quite as intuitive as in the similarly hip-swinging Giulia QV.

A big hardware change we haven't yet addressed is the transmission. Where the seven speeds of a torque converter once existed, now there are nine with a wet start-up clutch. Despite this, the Speedshift unit is actually the lighter ’box and – hallelujah – also programmed to upshift only on command when in manual mode.

It is a bit of a mixed bag, though. Neither is it as quick as the dual-clutchers of the class, nor as unflappable when you’re attacking a road. Left alone, the shifts slip through nicely enough (but perhaps too frequently) and are especially slick in Comfort mode. However, in manual mode, there’s just enough hesitation between paddle-pull and that fresh ratio taking effect for it to stifle the driving experience a touch. The imprecision frustrates.

Furthermore, this gearbox will simply throw its hands in the air should you dip so much as a toe into the soft limiter before initiating an upshift. By the time it finally comes to its senses the chassis’ centre of gravity has careened forward and that fresh the slug of torque then clobbers you back again. 

Back to top

In truth, the ’box is a metaphor way the C63 S conducts itself in broader terms, though it feels unreasonable to expect scalpe-sharp precision from what, in spirit, is a posh muscle car. Its talents lie elsewhere. We shouldn't bemoan the fact the whipcrack agility of the Giulia QV and the perfectly geared off-centre steering precision of the M3 Competition are absent.

And where those cars double down near the limits of adhesion, in the C63 S the lines of communication begin to run dry. It's best to enjoy its superb balance and the consequent ability to generate either tremendous stability and predictable oversteer on a whim at seven or eight tenths.

In a nutshell, the C63 S works best when you're merely late for work; the others excel when you risk missing the arrival of your first-born. 

C63s 0535f

Should I buy one?

Are you swapping an outright sports car for an alternative with usable rear seats? Are you patient? If so, we might be tempted to wait for the all-new BMW M3 due in 2020. Not only is the outgoing M3 already a sharper tool than this C63 S, but talk is that the next-generation model will weigh less than even the 1585kg of the £90,000 M3 CS. 

But why wait at all? The Giulia QV is remarkably pliant for something so agile, and gosh it sounds dreamy with that twin-turbo V6. It's a wonderful sports saloon, and we've said so many times. But its interior now trails that of the C63 S by a decent margin. The digital makeover for the Mercedes' cabin yields the kind of superficial appeal that a £75,000 four-door needs, and frankly the German car uses nicer materials more often. As for overall rolling refinement, we'd need a back-to-back test to say for certain but reckon the C63 S has a better showing.

Back to top

And then there's the M178 engine. In fact, test-drive a C63 S and you risk getting blinkered by it. Alongside the chassis and interior updates, it makes this car the most complete junior super-saloon that money can buy.

Mercedes-AMG C63 S specification

Test location Hampshire, UK Price £75,408 On sale Now Engine V8, 3982cc, twin-turbocharged, petrol  Power 503bhp at 5500-6250rpm Torque 516lb ft at 2000-4500rpm Gearbox 9-spd automatic Kerb weight 1680kg (DIN); Top speed 180mph 0-62mph 4.0sec Fuel economy 28.5mpg CO2, tax band 227g/km, 37% Rivals Alfa Romeo Giulia QuadrifoglioBMW M3 CS

C63s 0549t

Richard Lane

Richard Lane
Title: Deputy road test editor

Richard joined Autocar in 2017 and like all road testers is typically found either behind a keyboard or steering wheel.

As deputy road test editor he delivers in-depth road tests and performance benchmarking, plus feature-length comparison stories between rival cars. He can also be found presenting on Autocar's YouTube channel.

Mostly interested in how cars feel on the road – the sensations and emotions they can evoke – Richard drives around 150 newly launched makes and models every year. His job is then to put the reader firmly in the driver's seat. 

Join the debate

Add a comment…
Chelsea Khan 17 April 2019

Thanks for the review

Thanks for this review! You described everything in great detail. It helped me a lot with the choice. I want to go on tour with the troupe zumanity cirque du soleil. I hope a long relocation will be postponed well. I want everything to go with comfort and safety.


abkq 7 December 2018

On the one hand Mercedes

On the one hand Mercedes places a gem of a classic analogue clock on the centre concole, on the other hand it chooses 'futuristic' digital instrument graphics. This is an inexcusable clash in 'design language' 

FMS 7 December 2018

abkq wrote:

abkq wrote:

On the one hand Mercedes places a gem of a classic analogue clock on the centre concole, on the other hand it chooses 'futuristic' digital instrument graphics. This is an inexcusable clash in 'design language' 


Lord, you must be awful company if you are as dreary in life as you most surely are in print.

lamcote 6 December 2018

Double down!!

A distasteful phrase. And surely used in completely the wrong context in this article???

beechie 6 December 2018


lamcote wrote:

A distasteful phrase. And surely used in completely the wrong context in this article???

Bloody irritating, isn't it? These people write for a living - you'd think they'd have the gumption to avoid clichéd, trendy, and otherwise hackneyed phrases.

A few of the many others I can't stand are: 'full-fat', 'architecture', 'design-language', 'future plans' (when would the plans be for? The past?), 'side profile', price point. I also deplore those interminable opening sections which attempt to 'explain' what type of car it is, where it sits in the maker's range and what part of the market it occupies.

We can see for ourselves!

abkq 7 December 2018

beechie wrote:

beechie wrote:
lamcote wrote:

you'd think they'd have the gumption to avoid clichéd, trendy, and otherwise hackneyed phrases. A few of the many others I can't stand are: 'full-fat', 'architecture', 'design-language', 'future plans' (when would the plans be for? The past?), 'side profile', price point.

What's wrong with 'design language'? 'Design' is too general a description. 'Design language' or 'design grammar' describes the way a design is constructed (its rules, its formal, thematic material etc.) or it articulates the theoretical basis of design cf. Deryck Cooke's "The Language of Music", Christopher Alexander's "A Pattern Language"