Lexus Lm350H vs Mercedes-Benz GLC300

What's the difference?

The Lexus LM is going to be a niche model. This was not designed to appeal to people that may have bought a Toyota Tarago back in the day, or even a Kia Carnival now.

It has a specific purpose for ferrying people around in absolute comfort and at that, it succeeds in a big way.

It’s just a bonus that it’s great to drive.

Welcome to the automotive equivalent of a business class airline suite.

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

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.

Look, people movers are not considered the sexiest of automotive body styles, but that’s changing.

The Kia Carnival and Hyundai Staria are examples of good MPV design.

And the Lexus LM steps it up again. 

It is based on Toyota’s TNGA-K architecture that underpins a bunch of Toyota and Lexus models, including the Lexus RX, and it measures a whopping 5.1 metres long and has a three-metre wheelbase.

It shares its underpinnings with the latest generation Japanese-market Toyota Alphard, which is a cult hit in Australia among the grey import set.

The front-end design is bold, with the latest take on Lexus’ big ‘spindle grille’, pinched slimline headlights and a stubby nose. 

I am a big fan of this design. It is far more than a box on wheels and it has quite a bit of presence. 

The interior design up front is modern Lexus, with a few familiar Toyota touches, and while it’s not exactly minimal, it’s still visually appealing.

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.

While most of the fun happens in the second row of the Lexus LM, there is a lot to like in the front compartment.

The dash is dominated by a large touchscreen that houses Lexus’ latest multimedia setup. The logical menu and uncomplicated sub-menus ensure this is an easy system to navigate. Speaking of, the in-built sat-nav is one of the better systems I have experienced. 

Comfort isn’t just the domain of the second row - the driver’s seat is very supportive and comfortable, with power adjustment.

There’s plenty of glass including a smaller front quarter window that helps eliminate front blind spots, so forward visibility is exceptional. Rearward visibility is aided by the digital rear-view mirror that is designed to ensure privacy for second and third-row occupants. You don’t want the chauffeur spying on you while you’re sleeping, do you?

The other big tick for me is the driving position. Other people movers, namely the Hyundai Staria and Mercedes-Benz EQV, have very low window lines and it leaves you with a feeling of sitting on the car, rather than in it. I am sure it helps with extra light and it probably makes it easier for kids to see out of, but from a driving perspective, I find it a little disconcerting.

But the LM has flipped that. The front compartment is designed in such a way that it feels like a cockpit that you’re ensconced in. This helps the driver feel more connected with the car, and in the LM it feels like you’re sitting in the driver’s seat of a sporty sedan, not a five-metre bus. Very well done, Lexus.

And now to the main event - the second row.

Where to begin. Let’s start with space. Because there is so much of it. Unsurprisingly given the seating layout, there is an unending amount of head, leg, knee, bum, shoulder and whatever-else room. I can’t imagine anyone complaining about space back there.

Also, getting in and out is a breeze thanks to the sliding power doors on both sides. These can be opened from the front seat, and via several buttons in the rear.

Those captain’s seats are plush. Not quite Benz S-Class plush, but still.

They are adjustable six ways - power adjustable, of course - and they’re heated and ventilated. They recline almost flat, too, if you need a nap on the way to the country estate. And while you do that you can look up through the split sunroof, or close the shade a number of ways.

Is there a massage function? Of course there is a massage function. And it’s not bad. You can choose two settings - weak and firm.

Adding to the feeling of a business class airline seat, there is a fold-out table in the armrest, although it’s a smallish one. And there is dual-zone climate control in the rear.

There is a roof-mounted control panel for things like climate, sunshades and sunroof blinds, but much of this can also be controlled by the Apple iPhone-like devices clipped into both rear seats. These are closer to the seats, so it is easier to access than the roof.

Another function in the device is the Climate Concierge that features different modes - Dream, Relax, Focus, Energise. Depending on which one you choose, it alters the seat settings, massage, climate and lights to suit.

I love the massively wide side windows that are tinted (or privacy glass), too.

Other amenities include map pockets, knee and roof-mounted air vents and a 14.0-inch display screen that retracts from the roof and connects to an HDMI cable, allowing you to watch whatever you want.

The third row is not as appealing as the second. It is technically a three-person row, but the width and the fact that it has a sizeable gap in the centre suggests that this is best thought of as a six-seater van.

The seats are not as plush of course, so you might not want to spend too much time in that row unless you are a small child. But you do get USB-C ports, cupholders, air vents, lights, sunglasses holder, power side shades and grab handles.

Getting in and out of the third row can take a while. It’s all power adjustable, so you don’t have to lift anything heavy - but it takes a while for the second row seats to move forward and up.

With all seats in place the cargo space is limited. In fact, it’s just 110 litres.

That’s similar to what you get in a seven-seat SUV. But it did fit all our overnight luggage easily.

Drop the rear row and that expands to a maximum of 1191 litres in the 350h or 752 litres in the 500h.

All grades have a space-saver spare wheel.

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.

There are two hybrid powertrains available. Coming next year, the LM500h combines a 2.4-litre turbocharged petrol engine and a hybrid setup, making for power and torque of 202kW and 460Nm respectively. It is all-wheel drive and is paired with a six-speed automatic transmission.

The LM350h comes with a 2.5-litre naturally aspirated petrol engine and a parallel hybrid system, offering up a total system output of 140kW and 239Nm. The 350h comes in front or all-wheel-drive guise and uses a continuously variable transmission (CVT).

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.

As you’d hope with an all-hybrid line-up, the LM excels when it comes to combined cycle fuel efficiency. The 350h FWD sips just 5.5 litres per 100 kilometres, while the AWD version is 5.6L/100km. The 500h is a little thirstier at 6.6L. 

Our drive was so brief we did not get to record an on-test fuel figure.

The theoretical range of the LM, considering the 60-litre fuel tank and 5.5L/100km (350h) and 6.6L/100km (500h) fuel consumption figures is about 1000km.

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.

As mentioned earlier, I spent much more time in the second row as a passenger than I did behind the wheel of the LM350h. But it was enough time to capture some initial high-level drive impressions.

But let’s start in the rear. The ride in the second row is comfortable - as you’d hope. Our trek from Melbourne’s inner north down to the Mornington Peninsula included a lot of freeway, which was smooth. The only thing that disturbed the peace was a chunky bridge join that caused a bit of a thump. But we were hardly disturbed. 

Back in the driver’s seat, there’s a lot to like about how the LM350h drives. First of all, it feels smaller on the road than its ample dimensions would otherwise suggest. It even feels relatively light on the road. 

After the LM, I drove a Mercedes-Benz EQE SUV that has a similar kerb weight (the Lexus is about 2.4 tonnes), and the LM felt lighter.  

The hybrid powertrain is responsive enough, offering decent acceleration from a standing start. The more potent 500h will of course be quicker.

The transition from electric to petrol propulsion is pretty smooth in Lexus (and Toyota) models these days, and the additional noise-deadening materials in the LM ensure it’s subtle.

The 2.5-litre petrol engine is really only noticeable when accelerating hard, and the CVT a slight drone, but it’s in no way unpleasant. 

Otherwise it’s a superbly refined and quiet cabin on all but the absolute worst road surfaces. Whisper quiet power windows adds to that feeling of luxurious refinement.

Given the brief time behind the wheel, we didn’t get to test the handling capability of the LM, so that might have to wait for a review in the New Year. 

The steering is heavily weighted and doesn’t feel overly responsive, but it’s perfectly suited to this sort of vehicle.

That supple ride we experienced in the rear was also evident behind the wheel.

This was especially impressive on a couple of pock-marked peninsular back roads. The ride is also much more compliant than the Mercedes-Benz EQV I tested early in 2023.

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. 

When you buy a Lexus, you get a bit more than a car. The brand has a customer loyalty program - Lexus Encore - and depending on what model you buy, you are eligible for some pretty cool discounts, bonuses and experiences. 

There are three tiers, depending on your model. UX, NX, RX and ES fall under regular Encore, and electric models the RZ and UX300e sit beneath Electrified Benefits. But the LM, as well as the LS, LC and LX are under Encore Platinum - the top tier. 

That means access to the ‘On Demand’ program that allows access to another Lexus model for a few days or longer. So if you own an LC Convertible but need an RX for a few days to ferry people around, that’s all free. There’s valet parking service loans and more.

It also includes upgrades at Lexus partners. Our launch took us to Jackalope Hotel on the Mornington Peninsula, which is a Lexus partner, and you can get a bunch of extras here as a Lexus owner that other guests won’t get.

In terms of other ownership details, the LM is covered by a five-year, unlimited-kilometre warranty, and the servicing schedule is every 12 months or 15,000km.

Lexus is yet to announce the capped-price servicing details for LM, but it is expected to cover five years, and should be in the vicinity of approximately $700 per service.

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.