Mercedes-Benz GLS-Class vs Lexus LX

What's the difference?

The GLS63 is an intimidating beast from afar, but it rewards its occupants in almost every way. Yep, there really isn’t a box it doesn’t tick without serious compromise, such is its breadth of capability.

If there was ever a Swiss Army Knife of cars, the GLS63 is definitely a contender for the title, one that makes it very hard to wipe the smile off your face. Just make sure you can fit it in your garage first…

The Lexus LX500d is a genuine seven-seater with impressive levels of refinement, comfort and even off-road capability.

The interior borders on being chintzy and it’s price-tag is the wrong side of bloody expensive, but there's no denying this Lexus is packed with stuff.

It’s more city than country, more bling than bush tourer – it’s like a tarted-up 300 Series – but that’s absolutely fine for the people who buy these.

I wouldn’t blame anyone for cross-shopping a Toyota LandCruiser 300 Series with this – and then opting for the 300 Series! For one thing, you’ll save a stack of cash.

If the GLS63 was a Marvel superhero, it would undoubtedly be the Hulk. Simply put, it has road presence like few others. In fact, it’s frankly menacing.

Of course, the GLS is already pretty intimidating due to its sheer size and blocky design, but the GLS63’s full-fat AMG treatment takes it to another level.

Naturally, the GLS63 gets an aggressive body kit, with its purposeful bumpers, side skirts and rear spoiler serving as instant reminders of what you’re dealing with, but it’s AMG’s signature Panamericana grille insert that really hammers home the point.

Around the side, the GLS63’s 22-inch alloy wheels with staggered tyres (front: 275/50, rear: 315/45) make their presence known, positioned below the wheelarch extensions.

That said, some fun’s also had at the rear end, where the GLS63’s diffuser element integrates the foreboding sports exhaust system with quad tailpipes very neatly.

The focused Multibeam LED headlights also look the part, while the opposing LED tail-lights tie everything together outside quite nicely.

Inside, the GLS63 stands out from the GLS crowd with its sports steering wheel with Dinamica microfibre accents, and multi-contour front seats, which are covered in Nappa leather alongside the armrests, dashboard and door shoulders and inserts.

Of note, the doors bins are unfortunately of the hard plastic variety, which is very disappointing in a vehicle that costs this much. You would expect that cow hide would also been applied to them, but alas it isn’t.

The GLS63’s black headliner serves as an obligatory reminder of its sporting intent, and while it makes for a dark cabin, metallic accents are prominent throughout, while the optional trim (our test vehicle had carbon-fibre) mixes things up, alongside the ambient lighting.

And let’s not forget the GLS63 is still loaded with plenty of cutting-edge technology, including a pair of 12.3-inch displays, with one the central touchscreen and the other the digital instrument cluster.

Both are powered by Mercedes’ class-leading MBUX multimedia system and feature Apple CarPlay and Android Auto support. This set-up arguably remains the best there is today thanks to its speed and breadth of functionality and input methods.

In firmly keeping with its target market, the LX500d is a premium-looking SUV.

This is a big unit and everything is slick and in-your-face impressive. Inside and out this Lexus looks a lot like a tarted-up LandCruiser 300 Series that’s been on a recent cycle of steroids. 

The optional 22-inch alloy wheels (part of the $5500 Enhancement Pack, as mentioned above) add to the overall look. 

The interior is a tasteful blend of woodgrain, leather accents, soft-touch surfaces, plush seating, and even comfortable arm-rests.

Measuring 5243mm, 2030mm wide and 1782mm tall with a 3135mm wheelbase, the GLS63 is an upper-large SUV in every sense of the term, which means it’s also very practical.

For example, cargo capacity below the load cover is decent, at 355L, but stow the 50/50 power-split-folding third row via the boot and it’s very good, at 890L, or drop the 40/20/40 power-split-folding middle bench, too, and it becomes a cavernous 2400L.

Better yet, the boot’s aperture is almost square, and its floor’s flat, while there’s no load lip to contend with, making loading bulkier items even easier. Up to four tie-down points are also on hand (depending on seating configuration) to secure loose cargo.

Under the false floor is the space-saver spare, which is to be expected, but what isn’t expected necessarily is the fact there’s also enough room there for the cargo cover when it’s not in use, which would be the case if six or more passengers are regularly onboard.

Moving into the power-sliding second row, the GLS63’s practicality is once again brought to the fore, with up to six-plus inches of legroom available behind my 184cm driving position.

There’s also two inches of headroom with the panoramic sunroof in situ, not to mention just enough toe-room. The GLS63’s small transmission tunnel and sheer width also mean three adults can be seated on the middle bench with few complaints.

Amenities-wise, the second row has map pockets on the front-seat backrest and a small fold-down cubby below the rear climate controls, with it containing two slots for smartphones and a pair of strategically placed USB-C ports.

The rear door bins can take one large bottle each, while a fold-down central armrest is also on hand, featuring a shallow tray and retractable (and flimsy) cupholders.

Alternatively, the $2800 Rear Seat Comfort Package fitted to our test vehicle subs in a tablet that can control the multimedia system, a wireless smartphone charger and a small cubby into the former, as well as a heated/cooled cupholder atop the rear of the centre console.

In the third row, it’s not quite as roomy if you’re an adult. With the middle bench in its most accommodating position, my knees still brush up against its backrest, which is to be expected given it’s primarily designed for children. I also have an inch of headroom there.

Nonetheless, getting in and out of the third row is relatively easy as the power-operated middle bench tumbles forward and provides just enough space to make entry and exit somewhat graceful.

When seated, rear occupants are treated to two USB-C ports and one small cupholder each, so they’re arguably taken better care of than those in the middle.

Child seats are well and truly accommodated, with four ISOFIX and five top-tether anchorage points fitted across the second and third rows, although the latter will inevitably prove to be a much tighter fit.

The driver and front passenger are still taken care of, with a front cubby taken up by two heated/cooled cupholders, a wireless smartphone charger, two USB-C ports and a 12V power outlet, while their door bins take one large and one small bottle each.

In-cabin storage options include the large central storage bin, which hides another USB-C port, while the glovebox is on the smaller side, with about a third of it taken up by the fragrance, which is pumped into the cabin to ensure the interior always smells its best.

Everyone is well catered for inside this Lexus, in terms of, well, everything.

The tech is easy to use – it was simple enough to get Apple CarPlay working – and the screens are big: the horizontal 12.3-inch multimedia unit upfront, an 8.0-inch screen (to monitor air-con, air-suspension height, the four-wheel-drive system, and other vehicle information), a head-up display, plus a 7.0-inch touchscreen for rear passengers.

Heating and cooling are via the 'climate concierge' and everyone can keep themselves as comfortably hot or cold as they like with separate controls.

Storage is plentiful with the usual array of door pockets, cupholders, big glove box etc, but there’s also a cavernous centre console (with multiple ways to open the lids) as well as map pockets for the second row, cup-holders in the centre fold-down armrest and even cupholders for the third row.

The Lexus has a Qi wireless charger as well as front and rear USB-C charging ports – one upfront, two in the second row, and two in the third row – so that should keep any whinging about devices to a minimum – but, knowing kids, it probably won’t. 

There’s also a 12V DC socket (front and rear) and a 220V socket in the rear cargo area.

Power-adjustable seats upfront make life easy for the driver and front passenger and these pews are as good as what I’d imagine a massage chair is like. Even the second row is on the right side of plush, but the third row is not quite there.

Second-row passengers have their own air con and entertainment controls, and there’s also an HDMI port.

The moon roof – an Enhancement Pack inclusion – is power-adjustable and allows plenty of welcome natural light in through the top.

In terms of packability, the Lexus LX500d has a claimed 174L (VDA) of cargo space when seven seats are in use; 982L when five seats are being used (that’s with the power-folding third row stowed flat at the push of a button); and 1871L when all seats are stowed away (the 60:40 folding second-row seats tumble-fold forward), except for the driver and front passenger. 

The boot has a 220V power outlet.

As mentioned the seven-seat Lexus LX500d is the entry-level variant in the Lexus LX line-up. 

The standard features list is comprehensive but, for the sake of brevity, we’ll rattle off only a handful of them including a 12.3-inch multimedia touchscreen (with Apple CarPlay and Android Auto, and Bluetooth), a 25-speaker Mark Levinson sound system, heated and ventilated power-adjustable seats, woodgrain steering wheel trim, 8.0-inch multi-information display, quad-zone climate control, 7.0-inch touchscreen and separate control panel for rear passengers, multi-terrain monitor with panoramic view, and 20-inch alloy wheels.

It also has a digital rear-view mirror, adaptive variable suspension, and active height control with low, normal and two high settings.

The Lexus LX500d retails for $153,091 (excluding on-road costs). Our test vehicle has an optional Enhancement Pack (which includes 22-inch alloy wheels, moonroof, hands-free power boot with kick sensor, $5500) and has been fitted with a towbar ($1545). The total price of this vehicle as tested is $160,136 (excluding on-road costs).

Exterior paint colours include the no-extra-cost 'Onyx' or any of these – 'Liquid Metal', 'White Nova' (F Sport models only), 'Sonic Quartz' (not available on F Sport models), 'Titanium', 'Graphite Black', and 'Khaki Metal' (on our test vehicle) – all of which incur an extra cost.

The GLS63 is powered by a familiar 4.0-litre twin-turbo V8 petrol engine, with its version producing a thumping 450kW of power at 5750rpm and 850Nm of torque from 2250-5000rpm.

This unit is mated to a nine-speed torque-converter automatic transmission and AMG’s fully variable 4Matic+ all-wheel-drive system with torque vectoring and a rear limited-slip differential.

This set-up also features Mercedes’ EQ Boost 48V mild-hybrid system, which actually gives a 16kW/250Nm electric boost in short bursts, such as when accelerating off the line.

Speaking of which, the GLS63 sprints from a standstill to 100km/h in just 4.2 seconds, while its top speed is electronically limited to 250km/h.
 

The Lexus LX500d has a 3.3L V6 twin turbo-diesel engine, producing 227kW at 4000rpm and 700Nm between 1600-2600rpm.

It has a 10-speed automatic transmission with manual shift mode, a full-time all-wheel-drive system, low-range transfer case and locking diffs. 

The V6 is impressive and this is a smooth-shifting beast, but there’s a real lazy – not lively – feel to how the engine and auto work.

It’s pretty hefty as well – with a listed 2690kg kerb weight – so the Lexus takes a bit of a wind-up to get going off the mark and during overtaking moves.

The GLS63’s fuel consumption on the combined-cycle test (ADR 81/02) is 13.0L per 100km, while its carbon dioxide emissions are 296 grams per km. All things considered, both claims are unsurprisingly high.

In our real-world testing, we averaged a fearsome 18.5L/100km over 65km of driving, split between highways and country roads, so not your usual mix. A very heavy right foot definitely influenced that result, but don’t expect to do too much better in a normal run.

For reference, the GLS63’s 90L fuel tank can be filled up with 98RON petrol at a minimum.

The Lexus LX500d seven-seater has a listed fuel consumption of 8.9L/100km on a combined cycle.

Our actual fuel consumption on this test, from pump to pump, was 13.2L/100km. Note: our test included a lot of low-range 4WDing. 

The LX500d has an 80-litre fuel tank – so, going by that on-test fuel consumption figure, you should be able to get a driving range of about 606km or so. Take off a 30km safe-distance buffer and you have 576km.

Frankly, the GLS63 has absolutely no right being as capable as it is. It’s a really big bus that’s legitimately convinced it’s a sports car half its size.

Being a GLS variant, the GLS63 has independent suspension consisting of four-link front and multi-link rear axles with air springs and adaptive dampers, but its party trick is the addition of active anti-roll bars.

In what feels like magic, the GLS63 is simply not intimidated by corners, despite having massive dimensions and a considerable 2555kg (kerb weight) to deal with.

The active anti-roll bars make the GLS63 so much easier to drive fast through the twisty stuff, almost eliminating body roll, taking one key variable out of the equation for the driver. Active engine mounts are also fitted, helping to settle things even further.

The electric power steering on hand is also good. It is speed-sensitive and has a variable ratio, which basically makes the set-up more direct when it needs to be. It’s typically light in hand, too, until one of the sportier drive modes is engaged and extra heft is added.

So, handling is scarcely believable, which means the ride must be compromised, right? Yes and no. With the adaptive dampers in their softest setting, the GLS63 is very compliant. In fact, we’d say it feels luxurious when compared to other high-performance SUVs.

That said, our test vehicle was fitted with the optional 23-inch alloy wheels ($3900), which look the part but expose sharp edges and other road imperfections, not to mention generate noise easily heard inside. Naturally, feedback is exacerbated in the sportier drive modes.

Anyway, there’s more performance, and the GLS63 has the rest in spades. Its engine is a powerhouse in every sense of the word. It’s so powerful, in fact, that it hilariously hunkers down off the line or when suddenly accelerating at low speed.

Thanks to the mild-hybrid system, wads of torque is available from the get-go, making for a highly responsive driving experience, even in those rare moments when the engine isn’t on song.

While not as characterful as some of the other members in the 63 series, the GLS63 still makes some thoroughly entertaining noises, with its sports exhaust system popping like mad while on the overrun.

All of this ability is very well and good, but you need to be able to pull up quickly, and the high-performance braking package (400mm front and 370mm rear discs with six-piston fixed callipers and single-pot floating stoppers respectively) mercifully does exactly that.

The Lexus is a refined and comfortable vehicle on sealed surfaces.

It’s 5100mm long (with a 2850mm wheelbase), 1990mm wide (with a 1675mm wheel track, front and back), 1895mm high, and it has a 2690kg kerb weight.

The woodgrain steering wheel feels nice in the hands but even though the Lexus feels tighter and more controlled than the previous-gen – its body-on-frame structure has shed some kegs – this is a hefty rig so it’s no real surprise that body roll remains pronounced – it always tends to wallow even at optimal ride height. 

The suspension set-up – adjustable dampers, double wishbones at the front, a four-linkage rigid axle at the rear, stabiliser bars front and rear – is aimed at keeping things under control, and it certainly irons out any major issues, but it’s not perfect, even ably supported by adaptive variable suspension.

The brake pedals feel spongy, taking some time to ‘bite’, but the ventilated disc brakes front and rear did pull the Lexus to a controlled stop when I did a “watch out for that roo!” emergency-braking move.

And while, by its very nature, it may not be a very dynamic SUV to drive, its low-key composure makes up for that.

The gutsy V6 and auto work well, if lazily, together, and while that transmission is enough of a smooth shifter, 10 gear ratios seems like overkill to me.

Driving modes include normal, eco, sport and each adjusts throttle response, engine outputs, and gearshifts to suit the driver and the driving conditions.

It’s quiet inside – very quiet – and there’s no issues with vibration or harshness levels either.

Among its many tech-based attractions, the digital rear-view mirror is a handy touch.

This is a great open-road touring vehicle but with some flaws when it comes to adventuring off-road.

Our test vehicle is shod with Dunlop Grandtrek 265/50R22 112V tyres and these all-season tyres are fine for sealed surfaces, but they’re not up to low-range 4WDing in tough conditions, even more so on these 22-inch rims, as we found out during a few hours at our 4WD testing ground.

The Lexus has Cruiser-like off-road-capable underpinnings with top-layer dirt-focussed tech as well. 

There’s plenty of glass around so visibility is fine, steering generally feels light but takes on a clinical precision during low-speed, low-range 4WDing.

And ‘clinical’ is how the Lexus feels off-road – not always in a good way either. Like many contemporary tech-heavy off-roaders nowadays, it’s almost so good that you’re in danger of feeling entirely removed from the actual process of driving.

With multi-terrain select driving modes offering auto, dirt, sand, mud, deep snow, and rock options; with a multi-terrain monitor and panoramic view helping you ‘see’ everywhere that you usually wouldn’t be able to see on the track; with active height control helping you to lift the vehicle’s body in order to improve off-road angles at the push of a button; and the list goes on. 

That’s not forgetting downhill assist control, hill-start assist, crawl control, and off-road traction control.

Don’t get me wrong: high-tech is great because anything that helps maintain safe forward progress out bush or while beach driving is awesome but, Great Odin’s raven, it’d be great if the tech onslaught stops now. As if that’s going to happen.

If you’re looking to tow with your Lexus, listen up: unbraked towing capacity is 750kg, braked towing capacity is 3500kg. It has a gross vehicle mass of 3280kg and a gross combination mass of 6780kg. There you go.

It has a full-size spare tyre and that’s mounted under the rear cargo area.

The Lexus does not have an ANCAP safety ratings as it has not been tested yet.

Safety features include 10 airbags (driver and front passenger: front, knee, side; rear: side), AEB with pedestrian detection and daytime cyclist detection, front and rear parking sensors, reversing camera with rear camera washer, adaptive cruise control, road sign assist, blind spot monitor with rear cross traffic alert, tyre pressure warning system, and more.

Buying a Lexus gives you three-year access to Lexus Connected Services including (SOS) emergency calls, automatic collision notification, and stolen vehicle tracking.

As with all Mercedes-AMG models, the GLS63 comes with a five-year/unlimited-kilometre warranty, which currently sets the standard for the premium market. It also comes with five years of roadside assistance.

The GLS63’s service intervals are relatively long, at every 12 months or 20,000km (whichever comes first). Better yet, it’s available with a five-year/100,000km capped-price servicing plan, but it costs $4450.

The Lexus LX500d has a five-year/unlimited-kilometre warranty.

Capped-price servicing applies for three years. Servicing is set at six month/10,000km intervals with each appointment costing $595 over that period.

Lexus Encore Platinum benefits – including valet parking and on-demand vehicle loans – are standard for new Lexus owners.