Lexus RX vs Mercedes-Benz GLC-Class

What's the difference?

So, is the latest Lexus RX good enough to stay, or should it sashay away?

In almost every single way except accessibility (the cheapest is now $15K more expensive, remember), the newcomer is hugely better than the model it replaces, with a level of sophistication and refinement – as well as comfort – that the underwhelming predecessors just could not manage.

And, yes, while there is tech shared with the Toyota Kluger (as there's always been), RX #5 looks, feels and drives much more like a large luxury SUV should.

Speaking of which, few rivals can match the family-friendly RX's combination of customer service, glamour and opulence.

Our verdict then? This Lexus has gone from being a drag to one of the queens of the BMW X5 class. RX... Shantay, you stay!

The GLC300 Coupe isn't quite as great when it comes to being a family car as the regular SUV version of the GLC, and that's purely down to the sloping roofline which not only makes access more difficult to the second row but reduces boot capacity.

That said, the GLC300 Coupe makes a much better family car than a Mercedes-Benz C-Class sedan, or any sedan.

Easy and enjoyable to drive, packed with great features and still practical, the GLC300 Coupe would still cut it as a good family car.

They used to say that the revolution will not be televised.

At first glance, the same also applies with this fifth-gen RX, since all the big changes are largely out of view.

Precisely how different it looks depends on which angle you're looking at it from.

Observing nose-on, the RX's front tracks and body are wider and it boasts a new Spindle Body grille design which is meant to have a 3D effect, but is quite fussy to some eyes. And this is meant to carry on through to all future Lexuses, by the way.

Yet, in profile, the newcomer is hard to distinguish from the old one, with its returning floating roof C-pillar motif, which looks quite sleek. Yet the wheelbase has been stretched, which results in 60mm more interior space, and that benefits overall proportions as well as occupants.

Some reckon the strip tail-light design and clean surfacing make the rear the RX's most arresting angle.

Note that Lexus has dropped the old RXL seven-seater model – it didn't sell very well. A replacement is coming but it won't be anything like the new RX. Stay tuned to CarsGuide for more on that in the not-too-distant future!

Coupe SUVs aren’t for everybody… they’re not even for lots of people. But the design of an SUV with its roof cut down so that it meets the tailgate at an almost sportscar-like angle appeals to more than a few fans. The thing is they don’t just like the look, they love it, and they also probably enjoy how much the styling makes other people cranky.

To my eyes the GLC300 Coupe is the best execution of the bodystyle compared to those of BMW and Audi. There’s an elegance to the GLC300 Coupe and the AMG-line adds a tough look that only enhances the solid, powerful but pretty look.

The GLC Coupe is a mid-sized SUV and this new generation model is a bit bigger the previous one and now measures 31mm longer at 4763mm end to end, it’s 1890mm wide, 1605mm tall and has a wheelbase of 2888mm.

It’s also more aerodynamic than ever. No seriously, it’s drag coefficient is now 0.27 and it looks like a bar of soap - and it's about as slippery as one, too.

More curved surfaces await inside with a dashboard that pours down into the large centre console and it's adorned with a sloping and large portrait-style media screen. 

At night or in tunnels the ambient lighting glows through the air vents and skirts the edges of the door trims, console and dashboard.

It’s a minimalist and high-tech cockpit with modern sports seats up front and a Nappa leather wrapped steering wheel with its twin blade design.  

So, how does the coupe design work for family practicality? Let’s take a look.

At nearly 4.9 metres, the RX is deceptively long, and that pays dividends inside, while a larger and roomier cabin are the main beneficiaries of that stretched wheelbase.

Step inside, and you're greeted by a modern, attractive and functional dashboard that looks and feels upmarket – even in the least expensive version. This isn't always the case with luxury SUVs. You're not aware of corners being cut or cheap materials. It all seems really well crafted.

Sumptuous front seats provide loads of squishy, cushy comfort as well as adjustability to help find the right driving position for you. Taller people can now sit lower down if they like, meaning it's less cramped for them now. In fact, most occupants will find the RX pretty spacious up front.

Lexus has also worked hard to right other previous wrongs as well.

While not especially pretty or distinctive, the instruments are clear and informative, providing a wide array of driving, vehicle and multimedia data as required. That old intimidating tech-overkill presentation has been binned. Mercifully.

For example, the central touchscreen now features shortcuts for the most often-used items, so you're not forever diving into menus and sub-menus for climate control, navigation, audio, vehicle settings or phone access. And there's now a 'Hey, Lexus' voice control function to further aid useability.

Other plus points up front in the latest RX include an excellent audio system, extremely effective yet unobtrusive ventilation, and loads of storage – whether in the decently sized glovebox, beneath the vast centre armrest or within the deep door pockets.

And while they might need a moment to get used to, the e-latch electric door handles soon become second-nature to operate. And they provide a potentially life-saving extra bonus.

Speaking of which, there's even more surprise and delight to help you connect with the RX emotionally. It isn't all about wearing sensible shoes in here.

For instance, the big 14.0-inch touchscreen looks and feels contemporary yet is wonderfully user-friendly. It actually invites you to play around with it. The dashboard's horizontal themes create a sense of width and space that's... freeing. There are far fewer buttons than before, down from 81 to 50, though they're also still around for vital functions like audio volume control. And on some grades, the varying ambient lighting choices include exhilarating, relaxing and arousing.

But while this interior is a huge step forward and one of the most appealing aspects of this latest RX, there are some misfires remaining.

Chief among them is the infuriating cruise control buttons with their new-fangled 'capacitive touch' tech, which is fiddly to use and alarmingly distracting. This is a throwback to the infernal mousepad controller found in older models.

The same applies to the camera-based rear-vision mirror found on higher grades, which can induce nausea at a single glance. Did Lexus actually test this on humans beforehand?

Moving to the rear seat, it's clear the company did put the family first, with that stretched wheelbase and extra legroom it liberates. Your 178cm tester found ample headroom, legroom and kneeroom sat behind a front seat set up for them. Meanwhile, the cushion is well padded and the (reclinable) backrest comfy.

Amenities include face-level air vents, climate controls, USB ports, a centre folding armrest with cupholders and storage, overhead lighting and grab handles, deep door pockets and a decent view out.

Overall, that premium feeling up front continues out back too.

And great news for family car buyers – the latest RX's has a larger boot, it now measures in at 612 litres (and expands to 1678L with the rear seats folded down), and comes with a long, flat floor with some storage underneath.

Note, though, that only the F Sport has a temporary spare wheel – the rest make do with a tyre repair kit.

SUVs are the most practical cars for families because of the better access to the cabin thanks to their large doors and slightly elevated ride height, their big boots with wide and tall hatch openings and their high flat rooflines. They’re essentially raised station wagons.

A coupe-style SUV still has four doors but they are less boxy due to the sloping roofline which falls away quickly to meet the tailgate at a lower point. The effect is a sporty-looking shape but practicality is lost in this exercise of form over function.

The second row doorways aren’t as large as those on the regular SUV. I did a side-by-side test and felt like I had to duck under the sloping roof when getting out of the back seat.

The smaller opening also made it trickier to lift my toddler daughter into her baby seat.

The sidesteps are also surprisingly handy for bigger kids and my eight-year-old used them every time when climbing into the car.

Cabin storage is outstanding with huge door pockets and cupholders in both rows, and while the 545-litre boot in the GLC300 Coupe is 80 litres smaller than the cargo capacity of the regular GLC SUV, it's bigger than the previous version of the Coupe.

As for people space, there’s enough headroom for me at 189cm tall in the back seat and heaps of legroom, even behind my driving position.

I’ve mentioned the lack of climate control in the second row, but also should point out that there are no USB ports back there either.

There are USB ports in the big centre console box upfront and a long cord should be able to make it to the second row. 

There’s a wireless phone charger but it's housed in the bowels of the centre console too, and you’ll need to weave your hand while clasping the phone under the shiny black trapdoor, past the cupholders possibly with drinks in them and almost under the dashboard.

Mercedes-Benz is offering Australia just the GLC300 grade in both the SUV and Coupe body styles.

High-performance AMG variants are out overseas now and will arrive in Australia soon, too.

You can expect to pay more for these AMG beasts - a lot more than the $113,900 list price of the GLC300 Coupe.

Still the GLC300 Coupe does come standard with an AMG Line body kit and 20-inch AMG alloy wheels. LED headlights are also standard, so is the panoramic glass roof, tinted rear glass, proximity unlocking and a power tailgate.

Inside there’s synthetic leather Artico upholstery, sports heated front seats, Nappa leather steering wheel, an 11.9-inch media display with Apple CarPlay and Android Auto, a 12.3-inch digital instrument cluster and a head-up display. There’s also dual-zone climate control and wireless phone charging.

The value is good in terms of features, although the price is slightly higher compared to the rivals such as the BMW X4 xDrive30i ($106,400) and Audi Q5 Sportback 55TFSI ($110,200).

It’s worth pointing out, too, that the GLC300 Coupe is about $10K more than the GLC300 SUV version. Why? The coupe versions of prestige SUVs always tend to be pricier than their regular more boxy SUV siblings. Somebody in marketing will be able to explain why.

Having lived with the GLC300 Coupe with my family over the past few days I can say the proximity unlocking which works by touching even the back door handles is excellent, the tinted windows are dark and cut out much of the sun's glare, but there’s no climate control in the second row. There are air vents back there, which is good.

I found that on hot days the semi-transparent shade on the glass roof couldn’t stop the cabin from heating up quickly.

As per the Toyota RAV4 hybrid, the RX350h uses a 2487cc 2.5-litre four-cylinder petrol engine producing 140kW of power at 5200rpm and 239Nm of torque from 4300-4500rpm.

Combined with a 134kW/270Nm synchronous permanent magnet electric motor and nickel-metal hydride battery, it drives the front wheels via a continuously variable transmission (CVT). Maximum system power is 184kW.

The sprightlier E-Four option adds a second electric motor on the back axle to provide AWD. It betters the 2WD's zero to 100km/h sprint time of 8.1 seconds by 0.2s.

Next up is the RX350, which swaps out the hybrid tech for a 2393cc 2.4-litre turbo unit, pumping out 205kW at 6000rpm and 430Nm from a low 1700-3600rpm, while driving all four wheels via an eight-speed torque-converter auto. Its 0-100km/h time is 7.6s.

Finally, there's the RX500h hybrid, combining the 350's 2.4L turbo (producing 202kW at 6000rpm and 460Nm from 4300-4500rpm) with two electric motors (one on each axle) and a unique six-speed auto, for a combined 273kW. It's rapid too, reaching 100 in just 6.2s.

Oh, by the end of 2023, the RX450h+ plug-in hybrid electric vehicle (PHEV) will also be part of the line-up.

On all models, suspension is the tried-and-tested MacPherson-style struts up front and a multi-link rear arrangement. The RX's platform is new, sharing the TNGA Toyota New Global Architecture with the Camry, RAV4, smaller NX and – you've guessed it – the latest Kluger.

The GLC300 Coupe has a 2.0-litre four-cylinder turbo-petrol engine making 190kW of power and 400Nm of torque.

There’s also an overboost function which allows the engine to make an extra 17kW and 200Nm just for a brief moment, but that extra dollop of grunt combined with the regular output provides impressive acceleration (0-100km/h in about 6.3 seconds) for overtaking or moving quickly when you need to.

A smooth nine-speed automatic transmission sends the drive to all-four wheels.

The GLC300 Coupe is all-wheel drive and while there’s a setting for rougher terrain, along with one for comfort, eco and sport, but I’d make sure that it doesn’t get any more adventurous than tame gravel and dirt roads.

Mercedes-Benz refers to the GLC300 Coupe as a mild hybrid and this is because it has a 48-volt system and an integrated starter-generator.

This type of hybrid doesn’t use electric motors, doesn’t drive the wheels and won’t save much fuel, but it will provide efficiencies by supporting the engine and when coasting, plus will reduce petrol consumption to a small degree.

No shocks here.

The RX350 turbo slurped 11.0L/100km over our launch drive route, which took in both peak-hour traffic jams and rural highway runs, compared to 9.6L for the 500h hybrid turbo and just 6.4L for the 350h hybrid.

So, how do these compare to the official figures?

Well, quoting the pretty-lax NEDC numbers, the 350 should average 8.7L, the 500h a frankly surprising 6.5L while the 350h shines at just 5.0L in the 2WD and 5.4L for the AWD version.

The corresponding carbon dioxide ratings are 114g/km (RX350h 2WD), 123g/km (350h AWD), 197g/km (350 turbo) and 148g/km (500h).

Technically, then, the most economical RX, the 350h 2WD, can average 1300km per (65L) tank! The 350h AWD can achieve about 1200km, the 500h about 1000km and the 350 turbo just 776km (using a bigger 67.5L tank).

Both RX hybrids can drive silently in electric-only mode stepping off the line, at low speeds or when coasting along, and that's really impressive. Less so is every RX's thirst for more-expensive 95 RON premium unleaded petrol.

As we mentioned above the GLC300 Coupe's 48-volt mild hybrid system is not the kind of hybrid that will allow you to drive miles on electric power, nor will it dramatically reduce fuel consumption in the way a parallel, series or plug-in hybrid will. But every bit of efficiency helps.

Mercedes-Benz says the GLC300 Coupe will use 7.7L/100km after a combination of open and urban roads. 

We had the GLC300 Coupe for just two days, but in that time my family covered 176km of regular daily usage which took in motorways but mainly suburban duties such as the school run, supermarket dashes, that sort of thing.

In our fuel test we measured 14.48 litres at the fuel pump which works out to be an on-test fuel use figure of 8.2L/100km and not far off the manufacturer’s claim. 

While this fuel consumption isn’t overly high, a plug-in hybrid or even a parallel or series hybrid could return about 5.0L/100km or less.

Mercedes-Benz has dropped plug-in hybrids from its Australian range which is a shame because it would be good to see more efficient options in the GLC range. Of course if you want more efficiency from a Benz of the same size, there is always the fully electric EQB or EQC.

If you've owned any previous-generation RX, you'll definitely recognise most if not all of their good points, like ease, smooth-road and low-speed refinement, and complete reliability and dependability.

But now the Lexus has gained a far, far broader range of talents and capabilities. And that's a direct result of the series switching to the TNGA platform, like most of its brethren (and Toyota cousins).

Let's begin with the most exciting edition, the flagship RX500h F Sport Performance.

This is the brand's first hybrid turbo, and it's a cracker. Electrified for silky quietness when stepping off the line, the internal combustion engine (ICE) takes over seamlessly as soon as you need to really get moving, providing a rich, torquey shove as required.

While not BMW X5M fast, it's rapid all right, and satisfyingly responsive to your right foot. The whoosh is accompanied by an artificial (albeit quite nice) exhaust note, that's a bit turbine-like, to let you know you are or are about to break the law speeding.

Additionally, wearing 21-inch wheels and tyres, there's an exceptional amount of road grip, for safe, planted handling and roadholding. This applies to all the latest RXs, actually. But – and despite its 100-150kg weight penalty compared to lesser versions ­– the 500h feels the most athletic. Basically, it does what the tin says it should.

The flipside? While the adaptive dampers do smooth out most bumps, it can get a little jittery over some surfaces. And it is prone to some tyre noise intrusion over some bitumen. Yet, compared to former big-wheeled RX, the 500h's ride is comfy enough.

Next up is the RX350. This is basically the 500h with the same four-pot turbo engine but minus the electric motors and battery, so it benefits from a 155kg mass saving. And that's immediately obvious in its better high-speed agility.

However, while the engine loves a rev, the lack of electrification and all that meaty torque it brings is always noticeable, meaning the driver has to always mash the accelerator for overtaking to be over quickly. And as a result, the 350 can sound a bit noisy. Otherwise, for normal commuting and point-to-point travel, this is fine. Unremarkable but supremely capable. You'll miss the hybrid oomph, though. And the economy.

Finally, there's the RX most people buy – the 350h. Yes, there's a RAV4 engine and motor(s) stuffed in haute couture, but this is so much more than that. Performance from a standing start is always brisk, with speed piling on with delightful ease if you so desire, and there always seems to be some muscle left in reserve for instant manoeuvres – whether going fast or slow.

The whole experience is seamless, easy and muted. Only when you floor the throttle does the powertrain whine, but it's not that sort of SUV.

Plus, wearing the 21-inch wheels and with the adaptive dampers, the 350h steers, corners and rides well enough, being both skilful and accomplished, if not especially involving, let alone thrilling.

What we're saying is that the base hybrid proposition is good enough to wear the Lexus badge. The RX has finally come of age, dynamically speaking. And about time.

There’s a lot to like here but the short version is the GLC300 Coupe has a comfortable ride, but good handling, with a responsive engine, although rear visibility through the small back window is poor.

If we drill down a bit further I can tell you that excellent cameras around the car will help you check to make sure kids aren’t running around behind you and that forward and side visibility through the window is good.

An important takeaway is that the GLC300 Coupe is easy to drive with light steering and an engine that’s mild and controlled in its power delivery.

The gear shifter is mounted on the steering column, in the same way an indicator lever is. So putting the car into Drive, Reverse and Park is so easy and means you don’t have to take your hands off the steering wheel. 

As a family car I liked the good body control and composed ride. We have a small toddler that we can sometimes only get to sleep by taking her for a drive and we found that she could nod off and not be woken by potholes and speed bumps or too much leaning in the corners. 

The GLC was given the maximum five star ANCAP rating in 2022. There’s AEB, active lane keeping assistance and active blind spot warning and nine airbags including a centre airbag.

As mentioned above I especially liked the surround-view camera systems - which let you look right around the car - good for driveway safety and kids.

For child seats you’ll find two ISOFIX mounts and three top tether anchor points in the second row.

I was also impressed to see a space-saver spare wheel under the boot floor and not just a puncture repair kit. 

Lexus now offers a five-year, unlimited kilometre warranty with roadside assistance.

Furthermore, hybrid versions of the RX include a 10-year, unlimited kilometre battery warranty.

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

The RX offers three years and 45,000km of capped-price servicing, with each one costing owners $695 – that's pretty competitive for a luxury brand.

So is the first-rate ownership experience. Amongst other benefits, there's Lexus' 'Encore' aftersales subscription program; free for the first three years, it includes myriad offers and services including discounted petrol.

Plus, owners can have their cars picked up remotely and returned washed, and with free use of a loan vehicle delivered to their door.

The GLC300 is covered by Mercedes-Benz's five-year, unlimited-kilometre warranty. 

Services are annually or every 25,000km. And you can buy a three-year service plan for about $3000.