Mercedes-Benz GLC-Class vs Lexus UX

What's the difference?

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.

The updated Lexus UX300h Luxury is a solid entry in the premium compact SUV segment. It doesn’t break new ground, and there are areas that could be improved, but it handles well, offers a thoughtful selection of amenities for a base-grade luxury model, and its compact size makes it easy to park almost anywhere. For buyers seeking a stylish, efficient, and practical hybrid with a luxury badge, it’s a dependable choice.

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.

The updated Lexus UX is technically a compact SUV, but it feels more like a hatchback that's taken a small dose of steroids. The facelift brings a sharper look with a stylised 3D spindle grille, new air intake vents, fresh 17-inch alloy wheels, updated daytime running lights and a full-width rear light bar. The sculpted bodywork still showcases Lexus’ signature origami-like panelling and, overall, it’s a handsome little thing. That said, the heavy use of black plastic moulding around the lower edges detracts from its premium appeal.

Inside, the cabin takes a more understated approach. Up front it feels premium-enough, with synthetic leather trims, soft-touchpoints and those high-tech dual 12.3-inch displays headlining the dash. Your eye moves smoothly across the layout without lingering too long on any single element, which adds to the sense of elegance.

Not everything feels top-tier, though. Hard plastics are still scattered throughout the cabin, and they’re especially noticeable in the back seat where the doors have very little in the way of a soft surface. Yes, this is the base grade, but in a car wearing a luxury badge, it’s something you notice more than you should.

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 UX is a compact SUV, so it's best not to expect a sprawling interior. The front row offers the best space and comfort, with wide door openings and a ground clearance that makes it easy to hop in without any grunts. The seats are comfortable enough on long drives, although some fatigue creeps in on the passenger side due to the lack of lumbar support. Both front seats are power-adjustable and heated, and with the steering wheel also adjusting electrically, it’s easy to dial in a good driving position.

Move to the rear seats, and space becomes noticeably tighter for adults. At 168cm, my knees press against the seat in front, and even my eight-year-old asked me to slide the passenger seat forward this week. That said, he’s been mostly comfortable thanks to the wide door openings, lightweight doors and well-padded seats.

My son did point out that the tall window sills make it hard to see out, which could be a deal breaker for younger passengers. There are three top tether anchor points, but fitting three child seats across is unrealistic.

Storage is on the slim side, but the dual-opening centre console is clever, and there are two cupholders and drink bottle holders up front. The rear row only gets a single map pocket and two cupholders. A few more cubbies for things like sunglasses or keys would be welcome, as the cabin can quickly feel cluttered if you’re not careful.

Technology is neatly integrated. The dual 12.3-inch displays look sharp with clear graphics, and the touchscreen is responsive. The updated operating system isn’t a big leap forward, but it’s easy to use and the wireless Apple CarPlay and Android Auto work seamlessly. There’s also sat nav, a wireless charging pad, four USB-C ports, a single USB-A port and a 12-volt socket for charging.

The boot looks modest at first glance, especially with the floor set in its highest position, but it still swallowed a big grocery shop with no fuss. Officially, capacity is 364 litres, which makes it the smallest compared to its nearest rivals, although the adjustable floor helps with taller items or creates a handy nook for smaller ones.

A bigger drawback is the lack of a spare tyre as you only get a repair kit. For city drivers that might be fine, but for those of us who live regionally or do longer trips, a spare tyre is a must-have. On the plus side, the powered tailgate with kick function is standard here, whereas rivals make you pay extra for it.

The new Lexus UX300h is offered in three grades, and the grade tested here is the entry-level Luxury, priced from $55,370 before on-road costs. That positions it right in the middle of its rivals, with the Audi Q2 35TFSI S starting at $49,400 and the Volvo XC40 kicking off from $56,990.

The Luxury grade brings a solid list of standard equipment. While it won’t blow your socks off, it does offer good value-for-money compared to its premium competitors where a lot of features have to be added for additional cost. Highlights include powered front seats with heat function, synthetic ‘NuLux’ leather upholstery and trims, dual 12.3-inch displays and a upgraded OS for the multimedia system. You’ll also find a 10-speaker sound system and seamless wireless phone mirroring for both Apple CarPlay and Android Auto.

Technology extends further with built-in satellite navigation, Bluetooth, digital radio, reversing camera, two USB-C ports in each row, plus a USB-A port, 12-volt socket and wireless charging pad up front.

Practical features like keyless entry and start, dual-zone climate control, dusk-sensing headlights, updated daytime running lights, rain-sensing wipers, electrically adjustable steering wheel and a powered tailgate with kick function.

A three-year complimentary membership to the Lexus Encore program rounds out the package. Members gain access to the Lexus Connected Services phone app where you can customise your driver profile and have access to a digital key but there are a range of benefits from supporting partners like Westfield and Ampol to enjoy as well.

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.

The UX300h Luxury runs a hybrid setup that pairs a 2.0-litre four-cylinder petrol engine with two small electric motors. Combined, the system produces 146kW of power, and it drives through an electronic continuously variable transmission (eCVT). This powertrain sees it outmuscle the old UX250h by 15kW.

On paper, those new outputs sit neatly in the middle of this segment. Out on the road, though, the hybrid assistance helps the UX feel a little more sprightly than the numbers suggest. The electric motors give it an eager step-off from traffic lights and smooth power delivery around town, while the petrol engine takes over when more effort is needed.

It's a good combination for a little car.

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.

Fuel efficiency is a real strength. Lexus claims 4.2L/100km on the combined cycle, which is impressive against petrol-only competitors. With a 43L tank, you’re looking at a theoretical driving range of over 1000km between fills.

In my week of mixed open-road and urban driving, I saw a real-world figure of 5.0L/100km, and that’s without holding back on using the available power, which makes the claim feel very achievable.

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 UX300h Luxury proves itself to be a versatile little SUV. It offers ample power with prompt acceleration, making it easy to confidently take a gap in traffic or keep pace on the open road. It feels like a solid all-rounder that balances everyday usability with just enough grunt when you need it.

There are three selectable drive modes, though in practice they don’t feel dramatically different. The hybrid system can sometimes sound a little flustered at times as it switches between the two components, but it doesn’t translate into anything unsettling from behind the wheel. The actual driving experience remains smooth and predictable.

Ride comfort is another strength. The suspension does a good job of soaking up small bumps, and unless you’re on the highway in torrential rain, the cabin stays impressively quiet.

Visibility is mostly good, although the A- and B-pillars can occasionally intrude from the driver’s seat. It’s never enough to be a deal breaker, but worth noting. Where the UX really shines is in tight spaces because its 10.4m turning circle and compact dimensions makes it stupidly easy to park. The reversing camera is clear, though for a car wearing a luxury badge, it feels like a missed opportunity not to include a 360-degree camera as standard.

The UX300h Luxury comes equipped with Lexus Safety System+, covering the essentials and more. Standard features include lane keeping aid, lane departure alert, adaptive cruise control, traffic sign recognition, blind-spot monitoring, front collision warning, rear cross-traffic alert, rear seat alert, safe exit assist, ISOFIX child seat mounts, three top tether anchor points and tyre pressure monitoring.

Dusk-sensing headlights, rain-sensing wipers, and the restyled LED daytime running lights further improve visibility and overall safety.

The UX has a maximum five-star ANCAP safety rating from testing conducted in 2019, scoring highly across all individual assessments. While the updated model hasn’t yet been re-tested under the latest criteria, its suite of standard safety technologies and solid crash history should offer some reassurance.

The UX has autonomous emergency braking (AEB) with pedestrian and cyclist detection and is operational from 10 - 180km/h but it is normal to see this begin from 5.0km/h on competitors.

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.

The UX300h Luxury comes with a five-year/unlimited kilometre warranty, which is comparable to its nearest rivals, although we’re seeing increasingly generous terms from mainstream brands.

Servicing is straightforward thanks to a five-year capped-price program, with each service costing $595. The intervals are well spaced at every 12 months or 15,000km, whichever comes first.

This grade also includes a three-year complimentary membership to the Lexus Encore program. Membership brings access to the Lexus Connected Services phone app, allowing you to customise your driver profile and even use a digital key. Beyond that, Encore members enjoy perks with supporting partners, including Westfield and Ampol.

There's around 40 official Lexus service centres located around Australia but you can make use of its sister brand's (Toyota) service centres if you're in a pinch.