Mercedes-Benz Gls450 vs Cupra Leon

What's the difference?

The new GLS is everything you’d expect of a Mercedes-Benz with an S in its name. Luxury, performance, space, and in this case, thoughtful practicality. A super-capable, super-sized family truckster with the lot.

The Cupra Leon VZe demands you give it an appropriate amount of time to get to know.

Because, as an unknown challenger brand, as a hatch in an SUV world, as a PHEV wearing an EV price tag, it is up against it. And it's too interesting a car to be summarily dismissed.

But as long as you're not expecting a pure hot-hatch-cum-ultra-economical eco warrior, the VZe is a close-enough approximation of both for it to be an intriguing and enjoyable multi-faceted small car, while also possessing a fair degree of space as well as styling flair.

If you can forgive the screwy multimedia and cope with the high pricing, there's a lot to love here.

Launched globally in mid-2019, Merc describes the GLS as the S-Class of SUVs, which is apt given its 5.2m length, 2.5-tonne mass, and ultra-premium specification.

As mentioned, the GLS is big; a step up from the already substantial model it replaces. Built with the US market in mind, in fact it’s produced in Tuscaloosa, Alabama, it’s more than five metres long, close to two metres wide, and over 1.8m tall. And there’s more than three metres between the axles, a 60mm wheelbase increase over the previous model.

And despite the size of the canvas, the Benz design team has managed to make the GLS look like a modern Merc. Signature elements include obvious ones like the slatted grille with a couple of three-pointed stars on the nose.

But there’s also, the carefully chiselled twin ‘power dome’ bonnet, scowling LED headlights and vents to aid front brake cooling and smooth aero performance around the front of the car.

The big beast’s off-road intent is highlighted by extensions around the wheelarches, with big optional 22-inch rims sitting underneath. The fact they look right-sized for the car speaks volumes about its scale.

The racy AMG Line package is standard, and a recess and pronounced character line, tightening the lower waistline is a familiar Merc treatment, plus alloy roof rails toughen the look while dialling up practicality.

The rear is relatively simple, borderline generic, with tapered tail-lights offering the only strong whiff of design personality. But believe it or not, thanks to careful detail sculpting of the body, and smoothing underneath the car it boasts a drag figure of Cd 0.32. Outstanding aero performance for a large SUV.

The driver and front passenger are presented with a sweeping dashboard dominated by twin 12.3-inch digital screens, one primarily covering the instruments, and the central screen managing the MBUX media system, including audio, nav, phone integration, car set-up, and more, plus ‘Hey Mercedes’ voice control.

The overall feel is simple, and restrained, yet massively confident, with a subtle colour palette, large squared-off elements defined by brushed metal finishes, and an obvious, intense attention to detail, from the haptic controls to the beautifully finished, multi-function steering wheel.

And the standard Burmester audio system includes a two-way in-car communication function that subtly amplifies the driver and front passenger’s voices for those in the third row, and vice versa. Sheer genius.

One reason why you might want a Leon over, say, one of the more common PHEV SUVs like the Mitsubishi Eclipse Cross PHEV, or even Cupra's own Formentor PHEV, is because of its pleasing, conventional five-door hatchback size and shape.

Sleek and chiselled, it is quite a looker, especially from the rear three-quarter view. And the wheels are equally pretty.

Only from front-on does the Leon seem anonymous and somewhat dated in appearance. But at least it avoids the droopy fussiness of the 308.

Space is obviously a critical factor here, and no surprise there’s copious amounts of it inside the GLS.

Front seat passengers enjoy plenty of breathing room, without feeling remote from one another, and there’s lots of storage in the shape of a large lidded box/armrest between the seats, a decent glove box, two big cupholders and jumbo door pockets with room for large bottles.

There’s one data-enabled USB port in the front, two charge-ports in the second row, and four in the third row. Shouldn’t be any complaints about powering mobiles, tablets or games.

The second row feels every millimetre the SUV limo. Simply getting in and out is made easier because an auto lowering function drops the car 25mm when one of the doors is opened.

I was able to sit behind the driver’s seat set for my 183cm position with heaps of head and legroom on offer. And there’s an extra 10cm of electrically adjustable travel to play with if those in the third row agree.

The fold-down centre armrest features a lidded storage tray and twin pop-out cupholders. There are netted pockets on the front seatbacks, and again, the door bins are big enough for large drink bottles.

Three adults across the rear is a breeze, there’s climate control ventilation, and a huge glass sunroof is standard. Rather than asking ‘Are we there yet?’ the kids will be disappointed when you arrive!

Then there’s what the Cleary family refers to as ‘the way back seat.’ A pair of third row seats for the lucky kids that get to inhabit their own little world. Getting in and out is relatively civilised thanks to electric slide and tilt for the second row seats, and space is generous. I could sit comfortably, so the kids will be all smiles.

With all seats upright cargo capacity is enough for a seven-person day trip (355L VDA). Press the button to fold the 50/50 split-fold third row down and your options expand substantially (890L). And with 40/20/40 split-folding second row lowered, transportation of a full, three-ring circus is on the cards (2400L). Overall, more space than the arch enemy BMW X7.

Plus, the ability to lower the car 50mm thanks to the standard air suspension makes life even easier. And one button lowers the second and third rows at the same time.

The spare is a collapsible space-saver, and towing capacity for a braked trailer is 3500kg, with a tow ball weight of up to 140kg. The ESP system also features a trailer stabilisation function that counters oscillation with “braking intervention.”

Once standard setters, VW interiors have copped flak lately, losing the lead they once enjoyed in terms of perceived quality and functionality. A big backward step.

Within this context, the Leon's cabin is as aesthetically appealing as the exterior's, with lots of interesting angles and textures set within a broadly familiar VW-corporate multi-level dashboard design and presentation.

Most of the basics are largely fine, too. From the superbly enveloping front bucket seats and commanding driving position, to excellent ventilation and plenty of storage, there's much to commend.

The same goes for the moody, techy ambience, though it's closer to ‘chilled Audi' than ‘zesty Latin' in flavour.

Directly ahead of the driver is a 10.25-inch instrument cluster, offering several combinations of vehicle speed/operation and multimedia views.

Some of it looks good, some suffers from info-overload, but at least it's all configurable. Pick your favourite. And build quality seems up to scratch, too.

Like the Golf, there's also above-average space for longer legs and outstretched arms, while – after having to duck down a bit to get in – head and shoulder room are sufficient.

Selecting gears is a matter of manipulating a charmless stubby toggle. It works well enough, but remember when VW Group owners could interact with a Tiptronic-style lever and feel more immersed in the driving process? Memories.

That's replaced by paddle shifters, a divisive substitute that's of debatable merit in an electrified vehicle such as this, since they would serve better as regenerative braking controls.

But that's only the beginning of the confusion that ensues in the Cupra.

Reach for the 12-inch touchscreen to scroll through your many and varied media options, try and figure out the trip computer or search for an odometer reading, and any goodwill earned will be severely curtailed by just how needlessly complicated these and other once-simple tasks have become.

Plus, frustratingly, our particular car's multimedia system would just switch off mid-operation. This is not good.

We're certain time and familiarity will help make sense of working out where everything is and how to access vehicle functions located within layers of that touchscreen's myriad menus, but it is distracting and complicated.

And how is it that we could not find how to switch on nighttime illumination for the climate controls? In a week we failed to find that answer. And who ever green-lit fiddly slide controls over good old buttons? It's maddeningly frustrating.

Moving to the back seat, the Leon makes up some ground.

Two larger adults should settle into the outboard positions comfortably and snugly, aided by a pair of rear-facing air vents accompanied by a climate-control panel, two USB-C ports, a folding centre armrest with cupholders, ski-port access to the boot and useful storage via door bins and map pockets. There's even enough space for a third, smaller passenger to squeeze in between.

Further back, while the boot floor is long and flat and with a large tailgate opening to aid loading stuff in and out, the actual cargo capacity is just 270 litres, or nearly one-third down on the regular petrol Leon grades' 380L offering. This is due to the battery pack and related EV gubbins.

Speaking of which, if you need to carry charging cables there's nowhere to properly store them other than in the main boot area. And don't forget, there's no spare wheel.

At least there's a sturdy parcel shelf to keep prying eyes from seeing what you're carting around.

The VZe's interior, then, is spacious and broadly sensibly executed, but is let down – and mostly unnecessarily so – by some of the details. We strongly recommend trying before buying.

There's lots to unpack here.

SEAT started in 1950 as a venture between Fiat, the Spanish government and some private banks, until VW took over in 1986 and turned it into a youth-baiting value brand. Think pre-current Kia positioning.

Meanwhile, Cupra ­– a portmanteau of Cup Racing – had began as SEAT's competition arm earlier that decade. And there's been a Leon (referencing both ‘lion' and a city in Spain) based on every Golf since the latter's Mk4 iteration, making this generation numero cuatro.

Halve that figure and you end up with the number of small-car PHEVs left in Australia – Cupra's and another big-cat evoking Euro, the Peugeot 308 GT Sport PHEV, costing a few grand more than the VZe from $64,990, before on-road costs.

These high prices are clearly hurdles for Australian small-car buyers. Even Mercedes-Benz recently axed the slow-selling A250e due to a lack of buyer interest. Kia dropped the Niro PHEV. And Hyundai canned the Ioniq PHEV.

So, why are these types of cars so expensive, then?

The Leon and 308 feature a turbo-petrol engine, backed up by a small motor and a battery pack that's large enough to provide a claimed 67km of electric-only range in the Cupra's case. On paper at least.

That's more than the cheaper non-plug-in hybrid alternatives like the wildly-popular Toyota Corolla and superb Honda Civic e:HEV can manage.

So, besides exclusivity and two powertrains, what does the Leon VZe give you for your circa-$65K drive-away ask?

On the safety front, you'll find the now-usual driver-assist items like autonomous emergency braking (AEB), lane-support systems and adaptive cruise control, as well as 10 airbags including a nifty front-centre item. More on this in the safety section below.

Buyers also score LED headlights, auto high beams, fog lights with cornering function, adaptive dampers, tyre-pressure monitors, a reverse camera, electronic instrumentation, three-zone climate control, variable-ratio steering, keyless entry/start, satellite navigation, wireless phone charging as well as wireless Apple CarPlay/Android Auto.

There's also rear privacy glass, four USB-C ports, sports front seats, a heated steering wheel, paddle shifters, ambient lighting, powered/heated exterior mirrors as well as 19-inch alloy wheels and a tyre repair kit. No spare wheel is offered.

The pricier 308 PHEV has most of these plus Matrix LED lighting, Nappa leather upholstery, panoramic opening sunroof, heated/massaging front seats, 360-degree surround-view vision and a digital radio, but has smaller (18-inch) alloys and no adaptive dampers.

Our test car was fitted with the 'Leather Package' that adds $2050 to the price, ushering in leather upholstery, heated front seats with driver's side power and memory, premium audio and dash-top stitching, while the sunroof costs $1800 more.

These take the VZe north of $65,000 drive-away. That's pure-EV territory. Little wonder buyers baulk at PHEV small cars in Australia.

There are two engines on offer. The 3.0-litre (M256) in-line six-cylinder turbo-petrol GLS 450 4Matic, and the 2.9-litre (OM656) in-line six-cylinder turbo-diesel GLS 400 d 4Matic.

The all-alloy, twin-scroll single-turbo petrol engine delivers peak power of 270kW from 5500-6100rpm, and maximum torque of 500Nm across a broad plateau from 1600-4500rpm. It also features a 48-volt electrical system driving the ‘EQ Boost’ set-up, able to deliver an extra 16kW/250Nm for short periods. The integrated starter-generator also enables energy recuperation.

Although the all-alloy, twin-turbo diesel features variable valve lift it gives some ground on power, offering up 243kW between 3600-4000rpm, but torque is a solid whack, with 700Nm on tap from 1200-3000rpm. Worth noting, that to minimise emissions this engine features a “selective catalytic reduction converter” in the exhaust, which brings with it the use of an ‘AdBlue’ reducing agent. The separate AdBlue tank has a capacity of 31.6 litres.

The nine-speed auto transmission is the same in both versions, although the diesel has a slightly lower final drive ratio.

Under the Leon VZe's bonnet is a variation of the German parent brand's familiar 1395cc 1.4-litre direct-injection four-cylinder turbo-petrol engine, driving the front wheels via a six-speed dual-clutch transmission.

This Euro 6-rated unit produces 110kW of power between 5000-6000rpm and 250Nm of torque from 1550-3500rpm.

Meanwhile, the 85kW/330Nm electric motor also nestled under there is fed by a 12.8kWh Lithium-ion battery pack slung out back. The system outputs combined produce 180kW and 400Nm.

Weighing in at 1634kg (tare), the VZe's power-to-weight ratio is an impressive 110kW per tonne, explaining this portly small car's feisty 6.7 second dash in the 0-100km/h sprint. However, once the battery is depleted, that drops to a much-more mundane 67.3kW/tonne.

Based on VW's 'MQB Evo' modular transverse engine architecture, the Leon features a sports-tuned MacPherson-style strut set-up up front and a multi-link rear end, while adaptive dampers and variable-ratio electric power steering are also fitted.

Claimed fuel economy for the combined (ADR 81/02 - urban, extra-urban) cycle for the GLS 450 is 9.2L/100km, the more frugal GLS 400 d trimming that to 7.7L/100km. The petrol 450 emits 210g/km of CO2 in the process, the diesel 400d dropping that slightly to 202g/km.

Stop-start is standard, you’re looking at premium unleaded for the 450 GLS, and you’ll need 90 litres of dinosaur juice to full the tank on both models.

Cupra says the combined cycle average fuel consumption figure is a startling 1.8 litres per 100km, equating to just 40 grams per kilometre of carbon-dioxide emissions. The electricity consumption claim is 11.2kWh/100km.

Out in the real world, we averaged 5.9L/100km pump-to-pump, while the car's trip computer read 5.5L. This is a disappointment.

It must be all those extra kilos the VZe has to carry around, as most of our driving was inner-urban or casual freeway cruising. The stop/start system was working overtime once that battery depleted.

We managed fewer than 40km of pure-electric driving, against a WLTP rating of 52km (or 67km using the more-lenient NEDC number Cupra quotes), with the trip computer telling us we were averaging 5.9kWh/100km – a figure likely achieved in hybrid mode with the petrol engine chiming in.

Charging times vary, with the 12.8kWh battery needing between six and eight hours plugged in at home, or about four hours using a 7.0kW AC charger via the Type 2 connector. No DC rapid charging ability is available.

Filling up the 40L fuel tank with the required 95 RON premium unleaded petrol and giving the VZe the benefit of the doubt by using the official fuel consumption average of 1.8L/100km to find out its PHEV range, you could theoretically achieve 2220km between refills.

Or about one-third of that by our real-world experience.

Merc claims the GLS 450 will sprint from 0-100km/h in 6.2sec, and the 400 d in 6.3sec. Not hanging around for a 2.5 tonne mothership. But the standout is the 400 d’s torque. All 700Nm of it available from just 1200rpm to 3000rpm; right in the mid-range sweet spot.

The nine-speed auto transmission is smooth yet responsive, with paddles on the wheel for manual shifts when you want to pick the ratio. The combination of effortless grunt and the nine-speeder keeping things on the boil is an impressive one.

Suspension is by double wishbones at the front and multi-links at the rear, and while you can feel the weight in cornering, the standard Airmatic air suspension (which does away with steel springs) is superb in terms of ride comfort and body control.

We took a deep breath and pushed enthusiastically through a series of sweeping corners and the fat (285/45 fr - 325/40 rr) Continental ‘PremiumContact 6’ rubber wrapped around our car’s (optional) 22-inch rims gripped hard.

The ‘4Matic’ all-wheel drive system also seamlessly shuffles torque between the front and rear axles (theoretically up to 100 per cent in each direction).

Merc has put extra focus on body rigidity, the tuning of engine and suspension mounts, and sound absorption, and it shows. The GLS 400 d is beautifully refined on the highway. A neat touch is the car automatically lowering 15mm at motorway speeds or when ‘Sport’ mode is selected.

Steering is electromechanically assisted, and Merc says the front suspension geometry has been revised to minimise vibration through the wheel. And yes, feedback is minimal, but unfortunately so is road feel with only a general connection between your hands on the wheel and the front tyres on the bitumen.

When you’re steering a large beast like this, often with something substantial hitched to the back, you want to know braking performance is up to the task, and the GLS’s big ventilated discs all around deliver reassuringly strong stopping power, with nice, progressive pedal feel to boot.

The seats are adjustable six ways to Sunday, but beyond that they’re comfortable and supportive, even over long stints behind the wheel.

We stayed on the bitumen, because, let’s face it, that’s where this car will spend 99.9 per cent of its time, with the exceptions of the boat ramp, a ski weekend or pony club.

For those special occasions the optional ‘Off-road engineering package’ adds a low-range transfer case, inter-axle locking, hill descent control, and under body armour for more serious work.

There aren't many PHEVs out there, and that may remain the case, for Australians at least.

But the Leon VZe is definitely one of the more enjoyable of the breed to drive and ride in, with a sporty bias that lives up to its sleek and sexy styling.

With a fully-charged battery, off-the-line acceleration is brisk, and remains rapid as the revs and speed rise. It's smooth and slick in the best VW Group manner, and is accompanied by an appropriately stirring exhaust note. Especially in racy 'Cupra' mode.

The extra torque provided by the electric motor is also felt at low speeds, with little hesitation or delay from the throttle and DCT if the driver wants to instantly plug gaps in traffic.

Expertly tuned, the Cupra ought to be commended for how well-modulated everything feels and responds.

Find a fast, curvy ribbon of road and the Leon's steering comes alive, providing plenty of feel and control, backed up by a taut and agile chassis tune. Whether in 'Comfort' or 'Sport' modes, this is an athletic little hatch.

What the VZe isn't is a hot hatch.

When pushed, even in Sport or Cupra mode, it feels far heavier and less zippy than, say, a Golf GTI, lacking the latter's lithe spirit and dynamic dexterity.

That's not to say the Cupra isn't an involving, capable and secure handler or road-holder, because in isolation this is a terrific little car to hammer along. But it doesn't excite or thrill like the best of them. For more clarity on this, please drive a Civic Type R.

The driver can switch between electric, hybrid and turbo-engine-only modes to help preserve electricity, but once the battery is spent, there isn't the same level of punchy torque available.

Better, then, to instead select Comfort mode and let the adaptive dampers isolate you from those irritating bumps; while not plush, the ride is compliant enough for the VZe to make a very good impression of a grand tourer. Road noise intrusion, too, is pleasingly muted.

We're also grateful Cupra allows the driver to mix-and-match the drive modes, so you can choose a spicy engine tune with cushy suspension if you wish.

Note, however, that our Leon insisted on defaulting to Sport mode after every start-up. Using the flummoxing touchscreen to figure out how to change that to Comfort or Normal was a challenge.

Otherwise, there's much to enjoy from behind the wheel of the VZe. Probably the most fun PHEV we've ever punted around.

Tested in 2021, the Leon range achieved an ANCAP crash-test rating of five stars.

The VZe is fitted with 10 airbags – dual front, side chest, side head, driver knee and a front centre item; the latter is there to help reduce occupant-collision injury in lateral impacts.

On the driver assist tech side of things, the AEB includes pedestrian, cyclist and reversing detection, and there's 'Lane Assist', park assist, blind-spot monitor, rear cross-traffic alert with exit warning, a driver-fatigue monitor, emergency assist and tyre pressure monitors.

The AEB is operational between 5.0km/h and 250km/h. Likewise, the lane-support systems kick in between 65-250km/h.

The VZe is also fitted with electronic stability control, traction control, anti-lock brakes with brake assist and electronic brake-force distribution, adaptive cruise control, an alarm, auto on/off LED headlights with auto high beam, cornering driving lights, front and rear parking sensors, rain-sensing wipers and a rear-view camera.

Plus, the outboard rear seats include ISOFIX child restraint anchors as well as three top tethers for top straps.

The Mercedes-Benz range is covered by a three year/unlimited km warranty, which, like Audi and BMW continues to lag behind the mainstream market where the majority of players are now at five years/unlimited km, with some at seven years.

On the upside, Mercedes-Benz ‘Road Care’ roadside assistance is included in the deal for three years.

Service is scheduled for 12 months/25,000km (whichever comes first) with pricing available on an 'Up-front' or 'Pay-as-you-go' basis.

As a guide, service pricing for the outgoing GLS is set at $2600 per service (up-front) and $3250 (PAYG), a saving of $650 a pop. Fourth and fifth services are also available for pre-purchase ($3550 and $4900).

The Cupra comes with a five-year/unlimited kilometre warranty, which is standard fare nowadays, as well as five years of roadside assistance.

Service intervals are at 12 months or 15,000km.

The VZe is offered with a three-year or five-year service pack in place of capped-priced servicing. The price for three years is $990 (until December 31, 2023).