GWM Haval H6GT vs Mercedes-Benz GLS

What's the difference?

The new GWM Haval H6 GT Ultra PHEV has got to be one of the few plug-in hybrids that makes sense to me, given I live in a regional area. The longer electric driving range and DC charging capability offers far more convenience and practicality than the usual plug-in hybrids I’ve sampled.

It’s well-priced and has enough features for the average family. So, while I don’t love everything about it, it offers decent value for money.

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 H6 GT is the better-looking cousin to the regular H6 SUV because the swoopy rear end adds some much-needed personality.

It's the 19-inch alloys, Michelin tyres and red brake calipers that add to the sporty vibe.

It looks quite large for the segment and while I’m not a massive fan of the heavy plastic moulding around the base of the car, it’s got enough charm to appeal to a wide audience.

Head inside though and you're immediately hit by a strong plasticky presence, whether it be from actual plastics in the dash and door panels or the synthetic feeling of the upholstery itself.

The sunroof and red-stitched 'GT' on the seats add something but its all rather plain and lacks some personality inside.

I do like though that there’s no transmission tunnel, which means more legroom for middle seaters in the rear.

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.

The most practical aspect of the H6 GT's cabin is its sheer size. It's a spacious cabin for the class and that translates to lots of passenger room in each row. Which is only let down by the relatively small boot capacity of 392L (when all five seats are in use).

The boot does feature a level loading space, a 12-volt power socket, retractable cargo cover and a powered tailgate. The latter I always appreciate with kids in tow.

There are lots of individual storage options with the front featuring a glove box large enough for an owner's manual, a middle console, two cupholders and two drink bottle holders. There's also a large shelf underneath the centre console, a dedicated phone cradle and a sunglasses holder.

In the rear there are two drink bottle holders, two map pockets and a couple of cupholders in a fold-down armrest. So plenty of choices for passengers.

Surprisingly, the most comfortable seats are in the rear which feature thick padding, good lumbar support and long seat beds. The electric front seats have heat and ventilation functions, as well as adjustable lumbar support but the lumbar sits too low and the seat backs curve in too far for them to be called comfortable on a longer journey.

The tech is made up of a 12.3-inch touchscreen multimedia system and 10.25-inch digital instrument panel and while they look nice, they're basic at best. The multimedia system is simply laid out but lacks any real customisation and doesn't have sat nav.

The touchscreen can be laggy and there is wired Apple CarPlay and Android Auto. GWM has confirmed that wireless phone mirroring is due sometime later this year.

Charging options include four USB-A ports (but no USB-C ports), two 12-volt sockets and a wireless charging pad but the pad didn't always work for my iPhone 15 Pro Max (whether that is a user or software issue, I'm not sure).

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.

Priced from $255,700 plus on-road costs, the GLS63 commands a $34,329 premium over its predecessor, although buyers are arguably getting more bang for their buck than before, even if it does sit well clear of the two other GLS variants: the $147,100 GLS450 and $153,900 GLS400d.

Standard equipment not already mentioned in the GLS63 includes regular metallic paintwork (our test vehicle was finished in Selenite Grey), dusk-sensing lights, rain-sensing wipers, power-folding side mirrors with heating, soft-close doors, roof rails, rear privacy glass and a power-operated tailgate.

Inside, keyless entry and start, augmented reality (AR) satellite navigation with live traffic, digital radio, a 590W Burmester surround-sound system with 13 speakers, a head-up display, a panoramic sunroof, heated seats (including middle outboard) and armrests, cooled front seats with massaging functionality, power-adjustable seats, a power-adjustable steering column, temperature-controlled front cupholders, five-zone climate control, stainless-steel pedals and an auto-dimming rearview mirror feature.

With BMW not offering an X7 M (although the slightly smaller $209,900 X5 M Competition is available) and the $208,500 Audi RS Q8 really from the segment below, the GLS63 does not have a direct rival in the Upper-large SUV segment.

In fact, the $334,700 Bentley Bentayga V8 is actually the model that comes closest to the GLS63 when looking for a seven-seater with a similar level of bent-eight performance.

The new H6 GT Ultra has a plug-in hybrid powertrain that combines a 1.5-litre four-cylinder turbo-petrol engine with three electric motors, two at the front and one at the rear.

Together they produce a combined power output of 321kW and 762Nm of torque. That gives this 4WD a 0-100km/h sprint time of 4.9 seconds. So it's a quick SUV but somehow it doesn't manage to feel 'blow-your-hair-back' quick.

The engine is paired with a two-speed dedicated hybrid transmission (DHT) and the switch between the electric and engine components is practically seamless.

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 new H6 GT has a ternary lithium battery with a large 35.43kWh capacity. It also has a Type 2 CCS charging port, which is pretty rare but welcome on a plug-in. This system can accept up to 6.6kW on an AC charger and up to 48kW on a fast DC charger, which is great.

It means you can plug in at a DC fast charger during a road trip like a normal EV and that improves overall efficiency.

The combined fuel cycle figure is just 0.8L/100km and with the 55L fuel tank, you’ll get a theoretical driving range of over 1000km. That’s just something to consider right there. The considerable pure electric driving range of up to 180km also ensures that you can do your daily errands and school run without really touching the fuel tank. 

Which I totally proved this week after doing 469km of open-road driving and my daily 'urban' errands and only using 2.3L of fuel all week. I had two full charges during my week and that means my real-world usage beats the claimed figure at 0.49L/100km. Haval H6 GT for the win.

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 new powertrain took a few days to get used to because it doesn't behave like some of the PHEVs I've driven before. The emphasis is on EV driving rather than the ICE components. The pedals are quite stiff which takes a moment to adjust to, but the auto-hold braking and strong regenerative braking means it's difficult 'creep' forward like you can in a regular ICE car.

The one-pedal function is true one-pedal driving and if you time your deceleration right, you won't touch the brake pedal. You'll either like that or you won't but it's been nice to use this week.

The power delivery is prompt and there's a lot of power available. It doesn’t feel wicked quick like a performance EV but it certainly has enough punch to satisfy. You don’t notice when it switches between the engine or motor, which makes it a very smooth powertrain.

The steering is a little spongy but responsive enough to feel spry for quick lane changes. It's just not particularly dynamic on a winding road with the combination of the firmer suspension and soft steering.

Road noise can creep up at higher speeds and there is an annoying whirring sound from the motors that my son likened to a dull aeroplane engine roar.

The suspension is on the firmer side and you notice the bumps but you also don’t wince when you hit one. Visibility is okay but the thick A-pillar can get in the way when you're scanning the road at intersections, and the back window is narrow. A digital rear-view mirror would be a handy feature for the model.

The H6 GT Ultra PHEV is pretty easy to park because it has a clear 360-degree view camera system and parking sensors at the front and rear. The 12-metre turning circle makes it pretty friendly in a carpark, too. 

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.

Neither ANCAP nor its European counterpart, Euro NCAP, have awarded the GLS range a safety rating, but it’s fair to assume it would perform well in testing.

Advanced driver-assist systems in the GLS63 extend to autonomous emergency braking with pedestrian and cyclist detection, lane-keep and steering assist (including emergency), adaptive cruise control, active blind-spot monitoring, rear cross-traffic alert, traffic sign recognition, driver attention alert, high-beam assist, tyre pressure monitoring, hill-descent control, hill-start assist, park assist, surround-view cameras and front and rear parking sensors.

Other standard safety equipment includes nine airbags (dual front, front-side, curtain and rear-side plus driver’s knee), anti-skid brakes (ABS), electronic brake-force distribution (EBD) and the usual electronic stability and traction control systems. Yep, it doesn’t leave much to be desired on the safety front.

GWM offers the H6 GT with a seven-year unlimited kilometre warranty, which is becoming the normal term for the class and you will enjoy five years of roadside assistance through Allianz.

There is also a five-year capped-price servicing program that costs $1680, which is competitive. The first service is at 10,000km but subsequent intervals are spaced at every 12 months or 15,000km.

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.