Lexus LX vs Mercedes-Benz GLC-Class

What's the difference?

Huge specification in terms of convenience and safety gear are matched by an equally huge range of abilities in this vehicle. As well as rock hopping with the best of them, this is also a phenomenal touring rig and a more-than-capable off-roader. Of course, whether you can see yourself clambering up the side of a muddy creek crossing in $202,000 worth of vehicle is a personal matter, but rest assured, the Lexus will do it if you ask it to.

In the case of the hybrid LX, however, the vehicle now has an extra dimension to cover off, and from what we can see, it does take the efficiency and running costs of the big wagon to a new, better place. Mind you, that may only be the case if diesel continues to cost a dollar-a-litre more than petrol at the bowser.

The shift to petrol power also brings with it a level of mechanical background noise that we’re not entirely sure fits the Lexus legend, while additions such as the camera-based rear-view mirror system seems to be a conversation starter rather than an actual improvement.

Like I said right from the start, this new, hybrid version of the AMG GLC63 is technically superior to the model it replaces in every meaningful way. It is faster, more powerful and more fuel efficient and therefore a better performance SUV than the model it replaces.

Is it a better model than the one it replaces? Ultimately that will come down to how much stock you put into the soundtrack and your feelings on an AMG not powered by a V8 engine.

Because if you can see past that, then the AMG GLC63 is an absolutely fantastic performance SUV. Not only does the new powertrain make it faster in a straight line, but the chassis is very well-balanced, making for an engaging driving experience.

For those who can look past the smaller engine they will be rewarded with an incredibly fast and rewarding-to-drive member of the AMG family.

Note: CarsGuide attended this event as a guest of the manufacturer, with travel, accommodation and meals provided.

In a styling sense, that big, bold, deep grille at the front won’t be to everybody’s liking, but we reckon it’s pretty well matched with the otherwise taut skin of the LX’s body.

Inside, the plush look and feel is the dominant factor, but if you look really closely, there’s a fair bit of generic Lexus stuff on show. Is that a criticism? Hardly. The leather looks and feels luxe and only some hard plastics (such as on the door cappings) belie the car’s LandCruiser origins.

The GLC63 is unmistakably an AMG from the moment you first lay eyes on it. That’s thanks to the AMG-specific elements, starting with the grille with vertical strikes and the AMG crest on the bonnet; which is now a signature item for the performance sub-brand.

The GLC63 is also fitted with the Night Package II design kit; this adds a darkened grille and black chrome badging to further enhance its visual appeal.

The AMG-specific alloy wheels and more aggressive stance do mean the GLC63 stands out from the rest of the GLC range, helping it look fast even when it’s standing still.

Like many hybrids, cargo capacity takes a bit of a blow. In this case, placement of the battery under the cargo floor means a reduction in luggage capacity from 1109 litres to 899 litres. In the seven-seat variant, capacity is 883 litres with the rearmost row folded flat. The rear seat folds 60:40 and there are good, solid tie-down points in the rear. There’s no under-floor storage, however, apart from a small compartment just behind the rear seat which locates the tools and safety triangle.

The tailgate is powered (if a bit slow in its action) and there are cup-holders atop each suspension tower, clearly a hang-over from the seven-seat variant which is not available in F Sport trim. The cargo blind is a good addition, as is the 1500-Watt power socket in the cargo bay.

In the cabin, there are plenty of grab handles and the side steps give shorter folk a leg up when entering or leaving. Once you’re in, the front seats are terrifically comfortable as well as featuring a massage function on top of the heating and cooling functions. The steering wheel is also heated.

Paddle shifts might seem odd in a vehicle like this, but they are brilliant in off-road situations, although you need to first select manual mode on the shifter to have the paddles hold each gear for more than a few seconds in most of the on-road driving modes.

Speaking of the shifter, Lexus has seen fit to once again reinvent this simple control. You now need to pull the handle towards you and up for Reverse, across and down for Drive while Park remains a separate button even though it looks like just another icon on the lever.

A pair of cup holders live over to the passenger’s side of the centre console, and there are a pair of USB charge ports as well as an HDMI port in the dashboard. But the switches for the power windows are located almost directly under the driver’s interior door pull, forcing some unorthodox wrist geometry.

At least the buttons for the climate control and off-road functions such as diff locks and ride height are, indeed, buttons and not menu items. The simple knob to control the stereo on-off and volume is a great touch, too. So is the cooled centre console under a cover that opens from either side.

The rear seat is big and wide but the high floor dictated by the body-on-frame construction means those with long legs will have their knees bent while ever they’re in the back seat. The seat cushion itself is pretty flat, too, but the backrest does recline through a wide range of angles.

Reading lights, lots of air vents and a full set of climate controls ease the pain of riding in the back, but if you want cup holders, you need to keep the centre rear seat free so the armrest that houses the holders can be lowered and snapped open. Adding to the impression that plenty of thought has gone into the rear seat environment are the pull-up sun blinds on each window. Why don’t all cars have these?

Inside the GLC63 is clearly a derivative of the rest of the range, with its C-Class-inspired design and layout, but there’s enough AMG-specific elements to ensure it looks and feels special. This starts with the AMG steering wheel, which comes not only with a thick rim wrapped in Alcantara, but also some AMG special dials to adjust the various performance settings for the powertrain, suspension and transmission.

Then there are the AMG-specific seats, which look good and offer good support for the driver and front seat passenger. The rear seats offer decent space for what is a mid-size SUV, with room enough for two adults or teenagers or three smaller kids.

Those in the back aren’t particularly well looked after though, with only rear air-con vents and small door pockets but no USB charging ports or other small item storage.

The boot is 590 litres, down from 620L in the rest of the range, thanks to the addition of the rear-mounted electric motor. There’s also no room for the temporary spare the rest of the GLC range gets and instead you have to make do with a puncture repair kit.

The power and torque figures aren’t the only numbers that have risen sharply, with the GLC63 clearly impacted by a double whammy of inflation and the usual new-car price rise.

The GLC63 now starts at more than $191,814 for the SUV and $198,415 for the Coupe, which represents a nearly $30k increase over the old V8-powered model, which was priced at $164,600 just two years ago. Even for luxury car buyers that’s a big jump, especially when you’re trying to convince people of the merits of the four-cylinder powertrain. 

That also means it's more expensive than all of its key competitors, including the BMW X3 M Competition, Maserati’s Grecale and the outgoing, petrol-powered Porsche Macan GTS.

To help explain some of this price increase Mercedes-Benz Australia has opted for a high level of standard specification for local cars. Standard equipment includes 21-inch alloys, AMG composite braking, a panoramic sliding sunroof, a unique AMG steering wheel, power-adjustable sports seats in Nappa leather, a head-up display, dual-zone climate control, wireless smartphone charging and a Burmester 3D Sound system.

Also included is the AMG Track Pace suite, for those who want to unleash their GLC on the racetrack.

There’s also a limited run, AMG Edition 1 Package available too, for an additional $12,900. On the outside you get Manufaktur graphite grey magno paint, foiling with colour gradation and large AMG logo on the sides, an AMG Aerodynamics Package, unique alloy wheels with Edition 1 and AMG branding, yellow brake calipers and an AMG fuel filler cap in silver chrome with AMG lettering. 

Inside there’s AMG Performance seats, AMG Nappa leather in black with yellow contrasting stitching, AMG illuminated door sills,  carbon-fibre AMG trim highlights, yellow seat belts and a unique AMG Performance steering wheel wrapped in carbon-fibre and microfibre.

The hybrid driveline of the vehicle we’re looking at here marks a further expansion of buyer choice when it comes to how their Lexus LX is powered. The twin-turbocharged petrol and diesel variants will continue alongside the newcomer, although you can bet Lexus (and Toyota) will be watching the sales charts closely to see where consumer tastes fall.

The hybrid set-up here starts with the twin-turbocharged 3.4-litre petrol V6 (a lot of people - Toyota included - are calling it a 3.5, but at 3445cc, it’s not) from the Lexus LX600.

But instead of bolting directly to the 10-speed transmission, in this case, there’s a single electric motor and clutch unit sandwiched between the engine and transmission. That means the Lexus retains mechanical four-wheel drive, while the electric motor can provide extra urge for acceleration or towing as well as offering EV-only operation when it’s required (mainly in stop-start traffic).

Crucially, it also means the vehicle retains those traditional off-road qualities of low-range gearing and permanent four-wheel drive. The electric motor also contributes torque to the equation when the driver selects either Rock, Dirt or Deep Snow modes to maintain a steady flow of Newton metres.

The petrol V6 contributes a healthy 305kW and 650Nm to the picture, while the electric motor adds a further 36kW and 250Nm. When all that’s harnessed up, there’s a total of 341kW of power and 790Nm of torque on tap, allowing for a braked towing capacity of 3500kg. It also makes this variant the torquiest Lexus LX ever.

Interestingly, Lexus says the conventional 12-volt starting system and alternator for the petrol engine, means that unit could continue to operate if any part of the EV system failed.

One of the big questions over hybrid drivelines in off-road conditions is what happens if the vehicle suddenly finds itself partly under water. In this case, says Lexus, there are additional waterproofing measures which should prevent any problems mid-creek.

The F Sport grade gets a Torsen (torque-sensing) rear differential and firmer dampers for an overall sportier feel.

At 2780kg, the LX hybrid is heavy, and is at least 100kg more than the LX600 due to the batteries and other hybrid gear.

This is what lies at the heart of the AMG GLC63’s success or failure. As I mentioned at the beginning, the previous generation’s 4.0-litre twin-turbo V8 has been replaced by an F1-inspired plug-in hybrid powertrain.

But don’t think that means AMG is suddenly focused on efficiency over performance. When AMG says the powertrain is inspired by the brand’s success in Formula 1 racing, what it means is the battery and electric motor provides a significant performance boost to support the internal combustion engine, not just save fuel.

To that end the combination of the turbocharged 2.0-litre four-cylinder petrol engine and the rear-mounted electric motor produces an impressive 500kW and 1020Nm. That’s a massive jump over the 375kW/700Nm made by the outgoing V8.

Here’s where the hybrid driveline really comes into its own. On paper, at least.

Despite the added kiloWatts and Newton metres, the 700h manages an official fuel consumption figure of 10 litres per 100km. That compares with 11.9/100km for the 305kW LX600, although it’s still more than the 8.9L of the 227kW diesel-powered LX500d.

But the hybrid’s big advantage will come in city and suburban traffic where the stop-start nature of things will enable the driveline to harvest braking energy and turn that back into electricity for the battery.

Our testing showed an average of 11.2 litres per 100km in mixed conditions which blew out to 13.0 litres with more urban running. That’s pretty handy in the context of a vehicle like this and won’t be far from the real-world numbers of the diesel LX.

The Lexus carries 98 litres of petrol, split between one 68-litre tank and a 30-litre sub tank. That should give it a theoretical range of almost 800km, but again, that will depend largely on where and how it’s used.

Mercedes makes no secret that the battery is designed for performance, not saving fuel. It only has a 14km EV range but can recharge quickly on the move to provide a power boost when needed.

But despite all that, the GLC63 is actually significantly more fuel efficient than the old V8, using a claimed 7.3L/100km, which is a massive 4.9L/100km improvement over the old model. Although, on our day-long test drive we didn’t manage to come close to that claimed figure and instead saw returns around 11L/100km, albeit after a lot of spirited open-road driving.

At low speeds, threading your way through traffic or parking, the LX feels like it needs a lot of real estate. Which makes sense given the 5.1-metre overall length that puts it on par with a lot of dual-cab utes. The width of almost two metres plays into things, too, and reversing down the average driveway will often have the sensors chirping at you constantly.

What’s interesting, though, is the way the Lexus seems to shrink once you’re up and running in a more open setting. Even a winding road reveals a car that is easy to place in corners and seems to feed back lots of the right sort of information in terms of what the wheels are doing and where they’re placed. The result is that you can actually hustle the LX along quite smartly if you need to.

The ride remains composed yet there’s a level of control that helps keep the big, high LX relatively flat through corners and responding sharply to the helm. Even those huge wheels and tyres and their corresponding unsprung mass don’t intrude. It’s a great trick.

Less easy to appreciate, however, is the driveline, specifically the twin-turbo petrol V6. Frankly, it’s just not as refined as we were expecting. I wouldn’t mind betting Lexus has tuned the exhaust system to make the LX sound like there’s a petrol V8 under that heavily sculpted bonnet. And at low revs, it kind of works with a rhythmic, muted, yet guttural sort of bass coming through.

But rev it harder and the engine soon reveals itself to be a V6 with all the secondary vibration and resonance that implies. Simply, this vehicle is neither as smooth nor as quiet as the Lexus brand would suggest and the harder you rev it, the more it descends into NVH (noise, vibration and harshness) territory. The issue is made worse by the fact that the rest of the package is so darn quiet.

Even the stop-start - a technology that is now well understood - doesn’t seem quite as slick as it should be. Taking off from a green light with the petrol engine stopped, the Lexus often produces a small `sonic bump’ from the driveline as the V6 fires into life. It’s felt more than heard. But it’s still puzzling in the context of this make and model.

The transmission, meantime, is as silky as you’d imagine with upshifts and even downshifts that are barely perceptible. It would be nice, though, if the transmission obeyed the paddles a bit more faithfully. As it is, the chosen gear is only held for a few seconds unless you also pull the shift lever into manual mode.

I’ll also take issue with the rear-view mirror that includes a camera view as well as a conventional mirror option. I can see the point of having a camera-view mirror (when the cargo area is piled high, for instance) but I’ve never yet met one that works properly. The problem is that the camera view that pops up on the mirror’s screen is never as faithful as it should be. Also, if you wear glasses to read, you’ll also need them to focus on the image properly. While a conventional mirror has the same depth of field as looking through the windscreen, the camera-generated view does not. Also, when used through a wet rear window in low light, the camera view is borderline useless. This tech clearly has a ways to go.

Anyone who still believes in the adage ‘there’s no replacement for displacement’ hasn’t driven a modern turbocharged and hybridised engine. The GLC63 is a demonstration of the metaphorical and literal power of modern technology, combining an extremely efficient and potent internal combustion engine with an electric motor to make enormous real-world performance.

To be blunt, the GLC63 feels like a rocketship out of corners, launching with a ferocity and relentlessness the old V8 simply can’t match. It shouldn’t come as a surprise, a mid-size SUV with 1020Nm was always going to have plenty of performance, but even so it’s a shock to the system every time you give the GLC63 full throttle. Officially AMG claims it takes just 3.5 seconds to run 0-100km/h and has an electronically limited top speed of 275km/h - mighty impressive figures for a five-seat mid-size SUV.

To help get all that torque to the road, AMG deploys torque distribution technology that allows for it to be split an even 50/50 front/rear all the way to 100 per cent to the rear tyres.

Other technologies deployed to enhance its handling include AMG Ride Control suspension with adaptive damping and rear-axle steering. There’s also eight AMG Dynamic Select driving modes and four AMG Dynamics settings (Basic, Advanced, Pro and Master), so it’s a complex vehicle that is designed for the enthusiast.

While it’s easy to drive around town, once you get out on the open road you can really get a sense of the GLC63’s performance potential. Beyond just its powertrain the suspension offers good body control and the rear-axle steering helps it feel agile and responsive. 

It’s not perfect though. At times the complexity of the system does lead to some hesitation when you put your foot down. It certainly lacks the linear power delivery of the old V8 and makes for a slightly trickier driving experience at times.

As for the sound, which is one of the biggest elements missing from the V8, Mercedes has added AMG Real Performance Sound, which features a pressure sensor in the exhaust that picks up on the engine note and plays it through the speaker system. It certainly helps make for a louder, more noticeable engine noise, but it still sounds more like an A45 than the previous GLC63 and for many would-be buyers, that’s a major turn-off.

The GLC63 comes standard with a comprehensive suite of safety features including 'Distronic' (Mercedes’ name for adaptive cruise control), 'Active Lane Keeping Assist', 'Blind Spot Assist', 'Traffic Light Assist' and 'Adaptive Highbeam Assist'. It also includes Mercedes’ 'Pre-Safe' accident anticipation system - which pre-tensions the seat belts and will even play a white noise to protect your ears if it senses a crash is imminent.

A parking system that includes a 360-degree camera and active parking assist is also included.

The GLC range was awarded a five-star ANCAP rating in 2022, which pre-dates the latest testing protocols, so doesn’t provide a like-to-like comparison for vehicles tested after that date.

Lexus offers a five-year, unlimited-kilometre warranty on its vehicles and throws in three years’ worth of subscription to the Lexus Encore owner privileges and benefits program. Those extras include Lexus on Demand, valet parking, roadside assistance and even complimentary access to Qantas airport lounges.

There’s also five years of capped-price servicing available.

As well as the overall five-year/unlimited kilometre warranty, there’s eight years and 160,000km of cover for the hybrid battery. That can be extended to up to 10 years provided the battery is checked for degradation every year after the fifth year.

Servicing for the LX is every six months or 10,000km which is much more frequent than much of the competition, but reflects the heavy-duty nature of the vehicle.

Lexus has about 30 dealerships in Australia, primarily in urban locations, but for many servicing and repair jobs, a Toyota dealership or service centre should be able to handle things on the LandCruiser 300-Series-based LX.

The GLC63 is covered by Mercedes Australia’s usual five-year/unlimited kilometres warranty.

As for maintenance, Mercedes offers service plans, spanning three to five years. Three years will cost you $5025, $6455 for four years and five years is priced from $7180. Servicing intervals are 12 months or 20,000km, whichever comes first.