Mercedes-Benz S-Class review: seventh-gen limo tested

By topgear, 18 December 2020

OVERVIEW - What is it?

It’s impossible not to think of the previous six generations of Mercedes S-Class as you approach this seventh iteration. Think of them and pity such piffling technological world firsts as anti-lock brakes (1978, on the W116) or airbags (1981’s W126). Remember the awe you experienced the first time you saw a car with double-glazed windows (1991’s W140 behemoth)?

It’s tempting to fast-forward four decades and ponder what might lie in store for future masters of the universe, because this all-new S-Class – W223, if you’re so inclined – is arguably the biggest reset since the Sonderklasse first arrived in 1972. It’s a head-spinner, a car that looks further ahead than ever, and takes contemporary obsessions such as connectivity, digitisation, electrification and autonomy and gives them the mother and father of all Mercedes twists. Given that this is the company that has installed a very handsome (if glitchy) user-interface in its entry-level car, expectations are clearly sky-high for the vehicle that sits at the pointy end of the product hierarchy. On the other hand, the path to hi-tech Nirvana is beset on all sides with potential pitfalls, as anyone who’s grappled with the steering wheel touchpads on an E-Class will confirm. Mercedes has at times tested the hypothesis that it is possible to have too much of a good thing.

Corporate pride should keep the hubris at bay. Where to begin? Perhaps with the new S-Class’s Drive Pilot hard- and software, which has the ability to call on level four autonomy so the car can locate a space and park itself, assuming the garage is networked to cope.

Germany is also close to signing off on stretches of autobahn that will allow the S-Class to run its level three automonous functionality at speeds up to 60kph (conditionally automated, they call it). That means hands-off driving and the freedom to check your emails.

Although you could argue that this, the ultimate in chauffeur-driven cars, has been autonomous for years, and any email checking will likely be done by whomever is in the back. (Chinese customers, who accounted for a third of the 500,000 current S-Classes sold, apparently like to drive their own cars at the weekend; soon they’ll be able to sit behind the wheel and not drive).


For all its tech firepower, the new S-Class still relies on internal combustion for its motive power. The car we’re testing is the S500 4Matic, another of those 21st century German cars whose nomenclature bears no resemblance to what’s under the bonnet. What we have here is a turbocharged 3.0-litre in-line six, making 429bhp and 520(Nm) torques, whose efficiency and performance is boosted by a mild hybrid which adds 22bhp and 250(Nm) torques. There will also be a 2.9-litre, 282bhp turbodiesel good for 599(Nm) torques and wearing a fallacious 350d badge, an S400d 4Matic with 325bhp and 700(Nm) torques, while a new mild hybrid 4.0-litre V8 petrol is coming down the pipe, and a 580e plug-in hybrid version that adds a 28kWh battery to deliver a claimed range on electric power of 62 miles (approx. 100km) is due to arrive later in 2021.

The S-Class hasn’t always demonstrated an ability to ‘read the room’, that double-glazed early Nineties incarnation arriving into a global recession with a bluff charmlessness that its successor swapped for a near-invisibility just as the good times got rolling again. This version underwhelms somewhat in the pictures but has the sort of restrained elegance in the flesh that you know its creators will have pored over forensically. (There’s always the new Maybach for those parts of the world and people impervious to pandemic and economic strife.) In the UK, 80 per cent of S-Classes sold are the long wheelbase version; the new car has grown by 34mm in length to almost 5.3m, and it’s 1.92m wide. The longer wheelbase itself now measures 3216mm. Elbow room for the driver has increased by 38mm, there’s 23mm for rear passengers, who also get 16mm more headroom.


The grille, as usual, has grown, the body-sides and flanks are simpler but still magnificently surfaced, the head- and tail-lights simpler to look at it but now containing the most phenomenally complex illumination technology. Multi-beam LEDs are standard, with Digital Light available as an option; this set-up uses three hugely powerful LEDs whose light is refracted and directed by 1.3m micro mirrors, equivalent to 2.6 million pixels of light overall. And it’s intelligent: if the car detects road works up ahead, it’ll project a road sign onto the road ahead as a driver warning. Or shine a light onto a pedestrian if need be. It’ll be like Close Encounters of the Third Kind.

The detail execution on this car is crazy, and even runs to two different types of door-handle. The standard ones are similar to the current and frankly passé set-up. Then there are the flush-fitting handles that detect the key-fob and glide into view to greet you and your hands as you approach. You may think that this is rather a lot of trouble to go to. Until you try them. They’re also a factor in optimising the car’s phenomenal aerodynamics: in its slipperiest guise the S-Class cleaves the air with a drag co-efficient of just 0.22.

No stone in the greater Stuttgart area remains unturned.

DRIVING - What is it like on the road?

The original launch plan was foiled by Covid, so Mercedes has parachuted a few left-hook S-Classes into the UK. We’re told the spec is faithful to what we’ll be able to order here, but the specification sheet and options list on this thing are so complicated Crick and Watson surely had an easier time unravelling the secrets of human DNA than the S-Class’s product planners.

We’re in the S500 4Matic, its 3.0-litre six making 429bhp, boosted by its 48v electrical system and integrated starter motor (all-wheel drive is standard for the first time in the UK). The S-Class uses a re-engineered version of Mercedes’ large-car Modular Rear Architecture (now called MRA2) platform, which has additional aluminium in its construction (more than 50 per cent by weight) to complement the hot-formed high tensile steel used in the car’s safety cell and elsewhere. There are rigid extruded aluminium sections for the side members in the front, rear and sides. Needless to say, the new S-Class’s active and passive safety is off-the-scale, with airbags in places you didn’t know you could fit them and a Driving Assistance Package that adds the Mercedes -Tronic suffix to an extremely lengthy list of tech. This is either the world’s most paranoid car or the best protected, but it certainly moves us closer to the utopia of accident-free driving.

The S500 4Matic weighs 1,990kg, a substantial figure but perhaps less than you might imagine for such an imposing car. Clearly, the S-Class’s sweet spot is at autobahn cruising speed, and on the loop of our test run that encompassed the non-autobahn M1 it’s as quiet and majestic as you’d expect. At lower speeds the engine is a little more vocal than is ideal, and although it moves rapidly the S500 isn’t a full-bore bahn-stormer (full fat AMGs are coming to fulfil that need). As is the Mercedes way, there are four different drive modes: Eco, Comfort, Sport and Sport Plus, as well as an Indivdual one to tweak steering, throttle and damping. Unsurprisingly, Comfort is the one that suits the car’s character best, but if you do investigate the limits of the handling ‘envelope’ you’ll find grip and poise to spare, greater responsiveness from the primary controls, and a harder though far from thuggish edge to the car’s overall character. The nine-speed automatic does its thing as imperiously as ever, although if you do flick into Sport mode and take control via the steering wheel paddles you quickly lose track of which gear you’re in, and the display that tells you is a bit small.

There are a few other things to note. Our car was fitted with the active rear axle, an option Mercedes UK is still pondering. Mercedes offers two steering angles on the rear-steer, 4.5deg or 10deg, the former being enough to make a dramatic difference to the long wheelbase S-Class’s ease of use at low speeds. Ponder no longer: it’s a no-brainer and many hotel valets will be eternally grateful. This is also a wonderfully quiet car; for the first time, Mercedes is using an acoustic foam in key parts of the body, which is fitted early in production and then expands in the oven during cathodic dip painting. The area around the C-pillars – ie: beside the rear occupants’ head – is particularly well-suppressed.

Finally, the ride on the standard air suspension isn’t quite as peerlessly smooth as you might expect, at least not on the UK’s notoriously gnarly surfaces (E-active body control is an option the UK won’t be getting). Nor are the brakes quite as well modulated as we’d like. But these are minor grumbles, and the fact is you have to search long and hard to find faults.


ON THE INSIDE - Layout, finish and space

Plenty of us have argued about what constitutes the ‘best car in the world’, a debate that always seemed a bit reductive and silly. But we can now categorically confirm the best car interior, such are the lengths Mercedes has gone to with the new S-Class. Nobody has ever managed to blend high technology with traditional – though remixed, for want of a better word – ideas of luxury so convincingly. Here’s the key: the S-Class’s second-generation user interface is easy to use. Fearsomely complex to get your head around, simplicity itself in action.

It’s also the heart of a cabin of bold new shapes and forms that’s almost concept car in its execution. The screens ‘float’ above a dashboard that’s dominated by an expanse of polished wood, pin-striped in this car, that flows into the door trims. The window buttons live in a panel on the doors that also appears to float. Ahead of the driver is a 12.3in instrument display, complete with 3D functionality. Two different types of HUD are available, the larger one using augmented reality; it projects animated turn-off arrows if the navigation system is operating, for example, the information appearing to hover in your eyeline up ahead. The instruments can be displayed in four different guises (discreet, sporty, exclusive or classic), and three modes (navigation, assistance or service), using the wheel-mounted trackpad to change the configuration. The full-screen nav display uses data from five cameras, five radar, and 12 ultrasonic sensors to render a real-time overhead view of the car’s position on the road. On paper this all sounds like a recipe for distracting overload, but the speed with which you get used to it is incredible.

Now packing 50 per cent more processing power, Mercedes is also proud of the way the second generation MBUX is networked, to the extent that its Interior Assistant recognises eye-direction, hand gestures and body language. Voice activation is available via ‘Hey Mercedes’ which can learn the timbre and other characteristics of an occupant’s voice, and now supports 27 languages. This all sounds fantastic, but one wonders how often it will actually get used. Mercedes is also first to bring biometrics into the equation, with authentication for the main system, and Attention Assist that recognises driver drowsiness.

Fortunately, the central portrait display manages to convey the right degree of futurism without driving the driver insane with its complexity. The absence of a rotary controller or touchpad might sound foolhardy, but you simply swipe across the main modes – including media, navigation, radio and so on – your touch elicting a gentle haptic buzz on the crystal clear 12.8in OLED screen. Even the climate control is blessedly straightforward.

Less successful is the sliding control for the audio, neither the one on the base of the screen or the smaller one on the wheel moving totally smoothly. Mercedes’ boast that the car features 27 fewer analogue controls than the outgoing car could have struck terror into my being, if it weren’t for the fact that here, at long last, is a car that doesn’t turn the word ‘capacitive’ into a mild form of torture.


Then there’s the S-Class’s ambient lighting, which uses 250 LEDs to bathe the interior in a genuinely comforting warm glow drawn from a big palate of colours (some less comforting than others, unless you’re a regular at infamous Berlin nightclub Berghain). The light also encircles the interior and it’s hooked up to the safety systems, so it’ll pulse, for example, if the blind spot assist picks up something. Could be irritating, but isn’t.

What else? The seats are absolutely magnificent, whether they contain the 19 massage motors that are available or not (ours had them, and they really are something – 10 different massage programmes can be specified). A nod, too, to the most pillowy soft head-rests in the game. And also to the audio system, up to and including the optional top-flight 1750 watt Burmester 4D system, which incorporates 31 speakers and eight exciters, with subwoofers built into the back of the front seats. The rear compartment can be confgured in various ways, all of them incredibly comfortable. And this car also comes with an optional Energising Comfort programme should you be feeling fatigued. Say the words ‘I am stressed’ to the Hey Mercedes voice assistant and prepare yourself to be… energised. It’s actually really good. And effective.

OWNING - Running costs and reliability

This section is unlikely to detain prospective S-Class owners for too long. Indeed, Mercedes claims that 80 per cent of buyers in Western Europe are repeat customers (70 per cent in the US) and nothing cost related is going to stop them getting on board. Prices start at £78,705 for the standard wheelbase S350d in AMG line trim, the first of five levels culminating in the Premium Plus Executive iteration. Prices for the the S500 4Matic long wheelbase as tested here range from £100,035 to £110,325, whose 3.0-litre petrol engine delivers a claimed combined fuel consumption of 7.2-7.4 litres/100km, and CO2 emissions of 199-202g/km.

The car is future-proofed, with in excess of 50 electronic components capable of receiving over-the-air updates, including the MBUX, driver display, and driving assistance systems. Mercedes also makes some bold claims about the new S-Class’s use of sustainable materials, but with the pure-electric EQS waiting in the wings this is most likely the last hurrah for internal combustion in this generation of S. Are you worried about fossil fuels and the depletion of the world’s oil? C’mon, if you’re in one of these, you own the oil. And probably a subterranean bolt-hole in New Zealand for when it does finally run out.


We said at the beginning that this seventh generation S-Class might represent the biggest leap forward since the model arrived almost 50 years ago. It’s an astoundingly complete vehicle, one that manages to conjure up a truly contemporary vision for automotive luxury without over-dosing on technology. The second-generation Mercedes user interface is as easy to operate as it is beautifully designed and rendered, every detail masterfully managed.

But this is also still a car, and whether you’re behind the wheel or sitting behind the person doing the driving, the experience is deeply satisfying.

Words: Jason Barlow

High technology and sumptuous luxury merge in spectacular fashion to deliver a car that lights the way forward


The interior is an extraordinary achievement, new operating system is seamless, motorway refinement Exterior design errs on the side of caution, some of the materials are a touch showy
SCORE 9/10