Kgm Rexton vs Mercedes-Benz S450

What's the difference?

The KGM Rexton Advance is a large 4WD wagon packing an adequate amount of appeal.

It’s nice to drive on the open road, it’s comfortable and it signals continued incremental progress for KGM in terms of quality and functionality.

It’s fine for light off-roading but its 4WD efficacy is lacking. While it's not in the same class as something like the Ford Everest in terms of refinement, comfort, and general quality, ultimately, a lot of its rivals represent greater value for money and all-round driveability as family vehicles.

And even though it does offer owners a chance to take their urban-focussed SUV into the bush, its price is climbing, and other rival vehicles offer a more refined overall driving experience.

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 Rexton remains essentially unchanged from the previous generation and so it stays pleasant enough but generically inoffensive as are most other SUVs on the market.

Even for a city-focussed SUV, the body-on-frame Rexton looks low and while its 203mm of ground clearance is okay for daily driving it’s less than ideal for off-roading.

The only change to this Rexton over the previous generation? Pull-up sun blinds on the rear doors. Not a design change per se, but worth mentioning.

Does it set itself apart enough from other similar SUVs? Not really, but does that even matter to you?

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.

This Korean SUV has a nice but unspectacular interior, although it does have a low-key premium look and feel about it and the cabin is comfortable.

It has a familiar ease of functionality and there’s a family-friendly mix of durable plastic and soft-touch surfaces throughout the cabin.

The 2026 KGM Rexton range is a seven-seat 4WD wagon in a two-, three- (second row) and two-seat (third row) 50/50 configuration.

The leather-look seats are comfortable enough and the front seats are heated, ventilated and power-adjustable; the second-row outer seats are also heated.

The multimedia system with its 12.3-inch screen is okay to use, but I had no luck getting Apple CarPlay paired to my not-so-smart phone. And, believe it or not, that hasn’t happened to me for a long time. Note: other people were able to pair their phones to this Rexton with no problems during my week of testing.

Otherwise, functionality, storage and charge points around the cabin are satisfactory, including two USB-C ports up front (centre console) and a 12V power outlet.

The second-row seats – a 60/40 configuration, which folds, reclines and tumbles – are supportive without being overly so.

In the second row, as mentioned earlier, the only changes evident to this Rexton over the previous generation are the pull-up sun blinds on the rear doors.

There’s actually a decent amount of space for passengers in the third row here, but an adult still wouldn’t love to spend too much time back there.

The rear cargo area space of the 2026 KGM Rexton range is listed as 236 litres (with all three rows of seats in use), 641 litres (with third row stowed away), and 1806 litres (with second and third row stowed away).

There’s a 12V power outlet in the cargo area.

This new Rexton offers reasonable practicality but rivals such as the Mahindra Scorpio and LDV D90 offer just as much, sometimes more, all-round family suitability but for $5000-$10,000 less, depending on the variant.

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.

Right now, only two S-Class models are available – the S450 from $240,700 plus on-road costs and the 110mm extended-wheelbase S450L (LWB) for another $24,900 on top. Most buyers overwhelmingly opt for the latter.

Despite what the numbers may suggest, both are powered by a 3.0-litre in-line six-cylinder turbo petrol engine, delivering 270kW of power and 500Nm of torque to all four wheels via a nine-speed torque-converter automatic. Greater choices are coming later, including an all-electric version known as the EQS.

Almost every conceivable safety item is standard on the S-Class, including world-first rear-seat airbags located behind the front seats in the LWB model, taking the surround-airbag count to 10.

You'll also find route-based Speed Adaptation (adhering to the posted speed limits), Evasive Steering Assist (a sophisticated form of crash mitigation), adaptive cruise control with active stop/go, Active Lane Change Assist that automatically moves the car into the lane you indicate to), Mercedes' PreSafe crash-preparation tech that primes all the safety systems for impact, electronic stability program that encapsulates all the active driver-assist tech, Active Emergency Stop Assist, Autonomous Emergency Braking front and rear (including for cyclists and pedestrians), Traffic Sign Assist, Parking Package with Active Parking Assist and 360-degree camera and tyre pressure monitors.

On the equipment front there is the latest iteration of Mercedes' MBUX multimedia system with (another) world-first 3D display, complementing an OLED central display, powered closing doors, leather upholstery, air suspension, leather upholstery, velour floor mats, a multi-beam LED headlight system with adaptive high beams, heated and folding exterior mirrors, heat and noise-insulating acoustic glass for front side windows, dark privacy glass for rear windows, sunroof, roller sunblinds for rear windows, metallic paint and 20-inch AMG alloy wheels on runflat tyres.

Want cutting-edge multimedia? There's MBUX II's augmented reality for navigation and fingerprint scanner, as well as a more natural-speech Mercedes-Me Connect voice activation with global search.

Plus, predictive navigation with live traffic, parked vehicle locator, vehicle tracking, emergency call, maintenance management and tele-diagnostics, digital radio, Burmester 3D surround-sound system with 15 speakers and 710W amplifier, remote door locking/unlocking, geofencing, speed-fencing, valet parking, head-up display, Smart Phone integration with Apple CarPlay/Android Auto, wireless charging, ambient lighting, two-zone climate control, poplar wood trim, electric adjustment for front seats, steering column with memory function, climatised front seats, keyless entry/go with flush-fitting door handles offering hands-free access (including for the electric boot),

Besides the ‘forward facing' airbag for the rear-seat occupants, the S450L also scores electrically adjustable rear seats with memory and automatic rear climate control.

Key options – and the list is massive – include an $8700 Rear Entertainment Package, that brings rear-multimedia access, rear tablets with wireless headsets and rear-seat wireless smart phone charging, an AMG Line pack with a body kit, different alloys and larger front brakes ($6500), Business Class Package that includes aircraft-style reclining rear seating and tray tables ($14,500), Nappa leather ($5000), augmented-reality HUD ($2900), 21-inch wheels ($2000) and four-wheel steering ($2700). There's also a $14,500 Energising Package with contoured seating, heated-everything and massaging seats.

Please keep in mind our test cars featured many such extras. Tick all the boxes and you can add nearly $100,000 to the price of your S-Class.

So, is the S450 good value? Given some of the breakthrough safety and luxury features it offers, it is unique. Too bad the Federal Government's Luxury Car Tax makes them so much more expensive than they need to be.

The entire KGM Rexton line-up has a 2.2-litre four-cylinder turbo-diesel engine producing 148kW of power and 441Nm of torque.

It has an eight-speed automatic transmission, part-time 4x4 with high and low range, and an auto-locking rear differential.

This is a sluggish combination and not a particularly efficient powertrain, but it does the job, albeit in a lacklustre fashion.

Drive modes include Normal, Sport and Winter modes.

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.

Official fuel consumption for the Rexton is listed as 8.7L/100km.

On this test, I recorded 10.6L/100km, but I have done a chunk of high and low-range, four-wheel driving.

The Rexton has a 70-litre fuel tank. So going by that on-test fuel figure from a full tank, you could reasonably expect a driving range of about 660km.

But remember, I'm travelling with just me and some vehicle recovery gear. You'll be traveling with your kids, your mates, your pets, your camping gear, your sporting gear, all that sort of stuff. And that extra weight will have an impact on the vehicle's fuel consumption, so just keep that in mind.

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.

The Rexton is 4850mm long (with a 2865mm wheelbase), 1960mm wide and 1825mm high with a listed kerb weight of 2136kg.

With a turning circle of 11m, the Rexton is quite nimble around town.

On road, it’s okay. It's reasonably quiet and comfortable, and though it’s not particularly dynamic – the engine and auto make for a sluggish pairing – the Rexton is sufficiently driveable all round.

Its suspension – double wishbones and coil springs at the front, independent multi-link and coil springs at the rear – is firm, mostly controlled, but ride becomes jittery on irregular sealed surfaces and that characteristic is only amplified on even mildly corrugated dirt tracks.

And it’s in the dirt where the Rexton’s limitations are quickly exposed.

The Rexton is best considered a light-duty four-wheel drive: it is quite low; its stock tyres – Nexen NPriz RH7 (255/60R18 108H) – though marketed as “all season” aren't well suited for four-wheel driving. And the Rexton’s 4WD mechanicals and off-road traction control feel dated in operation, they just don't feel as effective as they should in a very competitive SUV market.

It doesn't have a lot of ground clearance or wheel travel and its shallow off-road angles – approach (20.5 degrees), departure (20.5) and ramp over (20) – are best suited to light-duty off-roading (i.e. well-maintained tracks in national parks in dry weather).

There's a decent spread of revs here, but there's not a lot to work with in terms of how effective the Rexton is as an off-road package so if you are here for a hardcore 4WD review with tyres-ripping-the-dirt action you're in the wrong place, because the Rexton just isn't up to that. And that's perfectly fine because people won't be using it for that purpose.

Having said that, the Rexton does reasonably well with what it has on board: there’s a decent amount of torque across a spread of revs; steering has a direct feel and nice liveliness to it; throttle response is quite sharp; and there is plenty of visibility forward over the bonnet.

Its auto rear diff lock is clunky in operation, disengaging abruptly, sometimes when you’re not even up, over or through the particular off-road challenge you’re tackling. I’ve noted similar issues with the Mahindra Scorpio in the past.

But driven with careful consideration the Rexton may do – at a stretch – the type of terrain you might not think it would be capable of.

And a decent set of all-terrain tyres would also help the Rexton, but it is what it is: a light-duty, four-wheel drive.

If you're thinking of using your family go-mobile as a touring vehicle, it’s worth noting the payload is 824kg, gross vehicle mass is 2960kg and gross combined mass is 6460kg.

Towing capacity is 750kg (unbraked) and 3500kg (braked).

The GWM Tank 300, Mahindra Scorpio and LDV D90 have similarly old-school type powertrains and 4WD set-ups, but the Tank is more comfortably capable off-road and yields a better general driveability than the Rexton and those others.

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 W223 S-Class has not been crash-tested yet by ANCAP or European affiliate EuroNCAP, so does not have a star rating. However, Mercedes-Benz claims it has striven to create one of the safety vehicles on the planet. Who are we to argue?

Almost every conceivable safety item is standard on the S-Class, including world-first rear-seat airbags located behind the front seats in the LWB model, taking the surround-airbag count to 10.

You'll also find route-based Speed Adaptation (adhering to the posted speed limits), Evasive Steering Assist (a sophisticated form of crash mitigation), adaptive cruise control with active stop/go, Active Lane Change Assist that automatically moves the car into the lane you indicate to), Mercedes' PreSafe crash-preparation tech that primes all the safety systems for impact, electronic stability program that encapsulates all the active driver-assist tech, Active Emergency Stop Assist, Autonomous Emergency Braking front and rear (including for cyclists and pedestrians, at speeds from 7km/h to over 200km/h), Traffic Sign Assist, Parking Package with Active Parking Assist and 360-degree camera and tyre pressure monitors.

The Active Lane Keeping Assist works in a speed range of between 60km/h and 250km/h while Active Steer Assist helps the driver follow the lane at speeds of up to 210km/h.

The MY26 Rexton range is covered by a seven-year/unlimited kilometre new-vehicle warranty, and five years of roadside assistance.

A service is required every 12 months or 15,000km, whichever occurs soonest with cost per service either $418 or $522.

KGM Australia has more than 50 dealerships across the country with a decent spread across metro and regional areas. Rextons can be serviced at those dealers or at approved workshops.

The Rexton offers a competitive warranty when pitched against the likes of the GWM Tank 300 (seven-year/unlimited kilometre), Mahindra Scorpio (seven-year/150,000 km) and LDV D90 (seven-year/200,000km warranty).

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.