Mercedes-Benz S-Class vs Peugeot 508

What's the difference?

Mercedes-Benz set out to restore the S-Class' place amongst the greatest sedans in the world.

In the heavily-optioned, near-$250K-plus S450 as well as the extended S450L at $300K as tested (the sweet spot of the range for now), we reckon the Germans have succeeded, pushing safety, comfort and technology boundaries, in a package that is true to the heritage of the series.

Tax-fuelled sky-high prices will certainly keep the S-Class niche in Australia, but the car is more than good enough to dominate its tiny corner of the upper-large luxury car sphere.

The best new car in the world? We reckon it's highly likely. Mission accomplished, Mercedes.

The Peugeot 508 Sportswagon GT PHEV proves wagons can be extremely stylish but looks aren’t everything and it is an expensive option compared to its luxury rivals. It earns its place with the premium interior but the safety could be improved on and the tech is more confusing than it needs to be. But this wagon offers an alternative for families who are sick of being in an SUV yet still need a little extra space. 

My son didn’t go nuts over this and complained about his view.

Most Mercedes models have followed the Russian Doll-style cookie-cutter styling theme, and the heavy family look continues with the W223.

Still, the flush door handles do add a touch of Tesla-esque modernity, while the elegant silhouette and clean lines are in keeping with the luxury aspirations. Larger in every dimension compared to the old W222, the S450 is some 71mm-longer in wheelbase (3106mm) than before while the LWB's has stretched out by 51mm (3216mm), benefiting proportions as well as interior packaging.

AMG-branded wheels look sporty but – in the S450 at least – they're perhaps a tad too gangster. A set of flush alloys would give it a more-modern and techier appearance, in our opinion.

Overall, however, the S-Class ‘7' possesses the prerequisite richness of design. It isn't as bold and mould-breaking as models like the W116 were back in their day, but the styling is still a success.

By the way, the latest S-Class is the first Mercedes to employ the MRA2 longitudinal platform, which is rich in lightweight steels (50 per cent aluminium), is correspondingly stronger than before but also 60kg lighter.

With a drag co-efficiency rating as low as 0.22Cd on some overseas grades, the W223 is one of the most aerodynamic production vehicles in history.

The design of this wagon is what wins it the most points. It is a damn fine specimen with the sleek lines in the body panelling and the sexy rear that looks well-proportioned for its 4790mm length.

Dark, narrow windows, 18-inch alloy wheels and a minimalist-looking nose, with fang-like daytime-running lights, all enhance its sporty look.

The rear lights have Peugeot’s signature ‘claw’ design and there’s something suggestively fun about seeing a twin-exhaust on a wagon!

On the interior, the multimedia system takes centre stage and the dashboard looks quite sleek, despite all of the deep cutaways.

The steering wheel is in the compact style that Peugeot is known for but it makes the cockpit feel driver orientated.

The quilted Nappa leather trims and shiny piano-black accents (with the piano-key controls) make for a refined cabin space.

For the beginning of our day with the S-Class, we were chauffeured from home to a mansion in Kew, a blue-chip Melbourne suburb. Our heavily-optioned S450L featured most of the aforementioned extras – including the Business Class Package and Rear Entertainment Package – and the experience was predictably, sumptuously memorable.

Reclining individual rear seats with easy-reach tablets, armrests offering access to all multimedia and available climatised and massaging cushions and backrests... we're no longer in our normal ride, Toto.

Yet, all these trinkets and gizmos are mere add-ons, that can turn a stretched Caprice into a flash hen's night carriage if enough money and glitz is thrown at it.

No, the new S-Class must impress in an altogether less tangible and more philosophical manner, involving all the senses, and not just what we see, hear and touch. It must appeal beyond the superficial. Otherwise, it is not a large Mercedes-Benz luxury sedan in the classic manner.

This is a Herculean task for the Stuttgart designers and engineers. By and large, though, the Three-Pointed Star has succeeded in achieving something special.

In its perception of peerless quality and engineering, the W223 is striving to move forward and look back simultaneously to the glory days of the seminal W126 (1980-1991). This is through meshing traditional virtues like solidity and quality materials while dazzling its passengers with technology that is still friendly enough to want to enhance your experience.

You can sink into the soft lounge seats, watch the world pass by silently outside and never be aware of the road underneath or the engine ahead. Double glazing, exquisite and aromatic fabrics and materials and lush tactile surfaces work their magic inside the car, while an airtight and aero body, solid platform, air suspension and a muted yet muscular powertrain all do their thing underneath. The atmosphere is special and rarefied. That's what an S-Class needs to be and that's what is happening in our $299,000 (as tested) S450L.

The same more-or-less applies up front, as the same trim, leather, wood and technology surrounds the driver and passenger. The spectre of the car that is surely The Car of the Last Decade – Tesla's Model S – is evident in the portrait touchscreen and sparse, almost wallflower dashboard design and layout. No big imposing architectures here.

Yet, while the American upstart actually takes stuff away, the S-Class packs the cabin with subtle features that – like when the planes stopped flying last year and the birdsong subsequently returned – only become obvious once the cabin's design simplicity clears all the white noise for you to be in a better frame of mind to enjoy them.   

Take the haptic interface, for example, as it is perhaps the best we've experienced; the sense of well-being garnered from the cumulative effects of profound seat comfort (the massaging function was never switched off), cocooning micro climate environmental control, orchestral levels of audio entertainment and the theatre of light and vision performed by the two available screens; it is an automotive experience like no other. And the eye-tracking 3D-effect navigation set within the electronic instrumentation. No need for cinematic glasses to get the effect. The driving position itself, by the way, is also first class.

Room to stretch and grow for sure, and in every direction. But room for improvement? You betcha.

Your tester had a headache after a little while staring at that woozy 3D map. The central vents – four at the front, two in the rear – look and feel cheap, leaving us mentally redesigning them; they are frightfully out of place here; the carryover column-stalk auto lever should have been binned in 2005. And, even though the digital instruments have a number of options, none are elegant enough for the S-Class. That's an especially subjective criticism, clearly, but one that – in the context of classic Mercedes luxury sedan contenders – is justified given how timeless the Bruno Sacco era of Daimler design was. Look him up, kids.

Still, after a couple of hours behind the wheel, with our senses reset to calm, it is obvious that the S-Class cabin is a unique and wonderful place – as it should be at a cool quarter-of-a-million dollars.

Job done.

PS At 550 litres (20L more than before), the boot is massive and luxurious enough to sleep in.

The front row gets the most space and you’ll be able to get into a comfortable position even if you’re tall.

However, it is a low car with its 142mm ground clearance and there may be a few grunts as you get in and out (or is it just me?).

My seven-year old loves how easy it is to climb in, though he didn’t have the best view out of the windows because the sills sit high.

The footwell lip also sits quite high, which isn’t an issue until you can’t open your door very wide and then it’s clumsy in a tight parking space.

The electric front seats are very comfortable and the extendable under-thigh support helps to minimise leg fatigue on a longer journey.

Surprisingly, for my 168cm (5'6") height, I have to sit much further back than I ordinarily would to get a comfy driving position.

In the back, you have plenty of headroom but behind my driving position, the legroom could be better.

An adult would still find it fairly comfortable on a longer journey so long as they aren’t behind someone tall. The seats themselves are well-cushioned and you sit in, rather than on top of them.

Individual storage options are good for this class with a dual-opening middle console, glove box and a great utility cubby next to the transmission shifter.

There is also a shelf underneath the centre console that houses the wireless charging pad and two USB-A ports but it’s a tad awkward to use and even see the ports when you're seated.

The amenities are good in the rear but for a top-spec model it’s lacking the luxury items you might expect, like heated seats and climate control but you’ll enjoy map pockets, reading lights, two USB-A ports and directional air vents.

It also has a fold-down armrest with two shallow cupholders, that in a quick turn, might spill their cups!

The boot is a great size at 530L with all seats in use and you can bump it to 1780L with the rear seats folded.

You get a level loading space and a 60/40 split with a ski-port in the back seat, which opens up your storage options.

There is a tyre repair kit rather than a physical spare but the tailgate is powered, which I always like.  

The technology is a mixed bag. It looks sharp and the touchscreen multimedia system is responsive but isn’t as easy to use as others I’ve sampled.

It doesn’t have a lot of accessible information or customisations available but it is easy to connect to the wired Apple CarPlay. There is also wired Android Auto for those users and built-in satellite navigation. 

The 12.3-inch digital instrument panel is the prettiest piece of tech in the car and there is more customisation available to make it feel yours.

Considering its price point and top-model status, it's more obvious that you miss out on premium items like three-zone climate control, faster USB-C connections and a head-up display.

Keeping things simple, there are only two variants for the 508 Sportswagon and our test vehicle is the top GT plug-in hybrid model that will cost $82,915 before on road costs.

That’s a $1000 price hike from last year and sets it well above its rivals with the Audi A4 coming closest at $78,169 (MSRP).

Given its rivals are well known for their luxury, the 508 has a fair bit to live up to but its styling and use of premium materials, like the quilted Nappa-leather trims, help it earn its position within the ranks.

The interior gets some other lovely big-ticket items with the eight-way electric front seats and a two-way memory position function on the driver’s seat.

Both front seats feature a heat function, adjustable lumbar support and a fabulous massage function. The ‘Cat Paw’ option is particularly nice!

However, the back seat misses out on these ‘top-end’ creature comforts.

There is a sunroof optioned on our test vehicle which adds $2500 to the price tag but creates an airy cabin in what would ordinarily be a bat-cave-esque space with that black headliner.

Only one colour is included in the price and our ‘Pearl White’ costs an extra $1050.

Technology has been revitalised with a new 10-inch touchscreen multimedia system and a 12.3-inch digital instrument cluster.

Dual-zone climate control, push-button start, keyless entry and a powered tailgate all add some practicality to every day life, too.

Phone mirroring tech like wired Apple CarPlay and Android Auto are easy to connect to and there are a bunch of charging options available throughout the car, including a wireless charging pad up front.

All-in-all, though, the features list isn’t as long as the price point might suggest.

Where are the V8s?

Right now, the only W223 you can buy is powered by an all-new 2999cc 3.0-litre in-line direct-injection six-cylinder turbo petrol engine dubbed the M256, complete with double overhead cams, an electric compressor intercooler and assistance from a 48-volt mild hybrid system and integrated starter-generator, adding 16kW and 250Nm to the 270kW of power at 6100rpm and 500Nm of torque from 1600-4500rpm.

The 9G-Tronic torque-converter automatic transmission and 4Matic all-wheel drive system combination is a first for the S-Class in Australia.

Top speed is limited to 250km/h, while the 0-100km/h sprint-time takes just 5.1 seconds in both models. Impressive for a two-tonne-plus luxury limo.

The GT plug-in hybrid model has a 1.6-litre, four-cylinder turbo-petrol engine, as well as an electric motor that sits on the front axle. It has an eight-speed automatic transmission that produces smooth gear changing driving the front wheels.

The combined outputs are 165kW and 360Nm which means you have a good amount of power for this sized car but it’s not a performance wagon as its 0-100km/h sprint time is 8.3 seconds.

The lithium-ion battery has a small 11.8kWh capacity and will get from 0-100 per cent in three and a half hours on an 11kW system. On my standard house plug, it took closer to six and a half hours.

With the aid of the mild-hybrid system, the S450 returned a combined average of an impressive 8.2 litres per 100km, which translates to 187 grams of carbon dioxide emissions per kilometre. 95 RON premium unleaded (or higher) is recommended. In the urban run it consumes 11.3L/100km (11.5 for S450L), and just 6.4L/100km (6.5 for S450L) in the extra-urban result.

At 76 litres, the fuel tank will allow a combined average range of about 927km between refills.

Peugeot says you can travel up to 55km on pure electric function, however my morning (return) school run is 38.4km and the electric range was spent by the time I parked in my garage after starting on a full charge. 

Under optimal conditions, where you’re utilising both the engine and motor, the GT PHEV has an official fuel cycle consumption of 1.5L/100km.

After charging it three times, travelling 444km on a mix of open/urban roads and using 33 litres of fuel, my real-world usage came to 7.4L/100km.

You absolutely get the best economy when you regularly charge it but sometimes you just don’t get the time to!

You'll need 43 litres of premium 95 RON unleaded fuel to fill the tank which, using our real-world average consumption figure, translates to a driving range of around 580km.

In former times, as the Germans say, a ‘450' on the boot indicated V8 power. In the W116 S-Class era it was one of the world's most evocative badges when ‘SEL' was also attached.

As mentioned earlier, though, it's the M256 3.0-litre turbo-petrol with a 48-volt ‘mild hybrid' electrical system that's doing the driving, to all four wheels. The real V8 W223 will probably surface later this year or in early 2022 with the S580L flagship. Bring it on.

This is not to say that S450 isn't good enough. With that electrified assistance, the blown straight six is smooth and swift off the line and rapid as the auto seamlessly steps up through all nine gears. Because it's so hushed and refined, it doesn't feel 5.1s to 100 clicks quick, but watching the speedo says otherwise – acceleration is assertive and strong right up way past the legal speed limit.

All that's missing is the burbling soundtrack of a classic Benz bent-eight. Oh well. Outstanding economy is a price we're literally willing to pay in lieu.

Even more impressive is the S450's ability to hustle along mountain roads like an overgrown sports sedan.

Now, for Australia, all S-Classes are fitted standard with an adaptive ‘Airmatic' air-suspension set-up, including air springs and self-levelling tech. In Comfort up to 60km/h, the ride height can be raised by 30mm, or lowered by 10mm under the standard 130mm baseline in Sport at any velocity, while in Sport+ it falls another 17mm.

With that in mind, yes, the standard air suspension performs a magnificent job smothering out most surface imperfections around town. Yet its real other party trick is to tighten up the chassis when corners get interesting and Sport mode is selected. Aided by progressively weighted and reassuringly responsive steering, the Mercedes tips into turns with precision and poise, slicing through with virtually no discernible body lean or understeer.

Now, we're not talking a leisurely drive on rural highways here, but Healesville's famous Chum Creek Road, where even a Porsche Cayman would feel like it's had a strenuous dynamic workout. The S-Class can be hurried along with confidence and finesse, displaying outstanding handling and roadholding for a 5.2-metre long limo. And the fact that the ride quality only suffers marginally when the red horns are out is all the more remarkable.

Back in the cut-and-thrust of inner-city peak-hour traffic, the Benz in Comfort mode continued to reveal its driver-orientated yet passenger-focused twin-personalities, zipping in and out of gaps while remaining comfy and composed inside.

Only when parking in tight spots are you truly aware that the W223 is longer than a Mazda CX-9. The optional four-wheel-steering system is claimed to slash the turning circle to A-Class hatchback levels. 10.9 metres is the claim.

The 2021 S-Class never ceases to amaze and delight.

The 508 Sportswagon is an odd car to drive. Around the city, the steering makes it feel like you’re in a go-kart and you may over-correct until you get used to it. 

On the open-road, it feels like it gets into its groove but the power reserves feel a tad too shallow as the engine can complain with only a light load. 

The suspension is well padded and you won’t notice too many bumps but you do get a fair bit of wind and road feedback at higher speeds. 

Because of the narrow windows, I am surprised by how great the visibility is but you feel tiny when you sit next to a big SUV in traffic!

That said, it corners beautifully and taking this on a winding coastal road is super fun.

The brakes are very responsive, which is great in stop-start city traffic but can make it feel a little jerky while navigating a car park.

And on that note, because of the funky steering feel, it takes a moment to calibrate your senses with what the car is doing.

Once you get used to it, it’s simple to park but the quality of the 180-degree camera system is pretty rubbish for where this car sits in the market.

The 508 has most but not all of the safety features you expect to see in a family car.

The active bonnet is a great feature as it lifts up in a collision to help minimise pedestrian injuries. 

However, in the modern market and this being a top-spec model, I am surprised it's lacking a few safety features, namely rear cross-traffic alert.

Other standard safety equipment includes blind-spot monitoring, LED daytime running lights, forward collision warning, lane keeping aid, lane departure warning, intelligent seat belt reminders, front and rear parking sensors, a 180-degree view reversing camera, traffic sign recognition, a driver attention monitor, and adaptive cruise control with stop and go functionality.

The 508 has a maximum five-star ANCAP safety rating from testing done way back in 2018 and it only sports six airbags, which is low for a family vehicle.

The 508 has autonomous emergency braking with car, pedestrian and cyclist detection and is operational from 10.0– 80km/h (5.0 – 140km/h for car).

There are ISOFIX child seat mounts on the outboard rear seat positions and three top tethers in the second row but two child seats will fit best. Front passenger comfort may be compromised when a 0-4 rearward facing child seat is installed.

Unlike many luxury brands that persist with a sub-par three-year warranty, Mercedes-Benz offers a five-year/unlimited kilometre warranty.

Intervals are every year or 25,000km, with a capped price service plan starting at $800 for the first year, $1200 for the second year and $1400 for the third year, totalling $3400. Alternatively, there is a Service Plan starting at $2700 for the first three years (saving $700 from the normal capped-price service plan), $3600 for four years and $5400 for five years.

On the 508 you’ll enjoy a five-year/unlimited km warranty and the battery is covered by an eight-year or up to 160,000km warranty, which is great.

You can pre-purchase either a three- or five-year servicing plan and the five-year plan costs a flat $2100 or an average of $420 per service which is very reasonable for this class. 

Servicing intervals are at every 12months or 20,000km, whichever occurs first.