Lexus RX300 vs Mercedes-Benz GLB

What's the difference?

The Lexus RX300 is luxurious but affordable, making it great value and superbly comfortable, with a high level of fit and finish. Fear not about the four-cylinder engine being small – it makes plenty of grunt and handles daily duties perfectly well.

Which would you go for: An entry level Lexus RX300 or a top-of-the-range Mazda CX-9? Tell us what you think in the comments below.

The Mercedes-Benz GLB is an oddball. While it isn’t my definition of beauty, it's a surprisingly capable and spacious small-to-medium SUV.

The entry-level GLB200, while comfortable, feels a bit underdone in the engine department. Therefore the mid-spec GLB250 with the more-powerful 2.0-litre turbo and mild-hybrid assistance plus all-wheel drive grip is the better pick.

I've mentioned the Spindle grille and its jewellery-like appeal, and even the sharp edges of this SUV make the RX300 look like a carved gemstone, but I'm not the biggest fan of this vehicle's proportions. I think the door-to-window ratio is a bit off. There's just too much door for my liking.

That said, I'm intrigued by the craftmanship, the attention to detail and the use of materials, which make this SUV both pretty and intriguing.

The cabin mixes the plushness of cushioned surfaces on the dash and the armrests  with pleasing design elements, like the swooping aluminium trim, which zig-zags its way from the instrument cluster to the passenger's side of the centre console.

The giant media display is impressive, but the functionality is awkward, to say the least, but more on that in the practicality section below.

The Luxury is the entry grade into the RX model and so comes with smaller wheels than the F Sport and Sports Luxury above it, but it does score roof rails, dual chrome exhausts, a roof-top spoiler and rear privacy glass.

How big is the RX300 Luxury? The dimensions show it to be 4890mm long, 1895mm wide and 1690mm tall.

How do the looks compare with rivals such as a Jeep Grand Cherokee, a Mazda CX-9 or a Land Rover Discovery? Hmm, each has its own distinctive styling, with the Jeep having brutish American looks, the Discovery boasting prestige British off-roader personality and the Mazda an elegant air that's way beyond its price point.

So why haven't I mentioned the Mercedes-Benz GLE or BMW X5? Because they're at least $20K more than the RX300 Luxury, which costs around $72K. If, however, you can stretch the budget to an RX 350 Sports Luxury then you will be crossing the $100K threshold into Benz and Bimmer territory. So let's talk about price.

This isn’t the prettiest car ever. It has the Mazda CX-8 or CX-80 effect where you can tell a smaller car has been stretched and extended to create more interior space. It just looks a little awkward as a result.

The rear section of the GLB in particular is much higher and boxier than the GLA which makes it look rather back-heavy. Thankfully roof rails are standard which toughens the look somewhat.

The facelift that was introduced in 2023 brought an updated front bumper, as well as tweaked LED headlight and tail-light signatures. The changes aren’t wildly different from the original car that launched in 2019 but it’s still fresh enough.

Inside is where this car is starting to look its age. While Mercedes-Benz was one of the first to introduce a wraparound screen set-up combining the digital instrument cluster and touchscreen multimedia system into a single unit, many have copied this and it no longer looks unique.

It doesn’t help that the dual 10.25-inch screens are small now in comparison to newer rivals. It’s standard for a digital instrument cluster to be closer to 12.3-inches in diameter now.

A main interior change with this facelift included the removal of the touchpad controller on the centre console. In its place is now a shallow storage area which doesn’t really serve a purpose.

There’s also a new AMG-style steering wheel as standard which has fiddly gloss black touch sliders that get grimy upon use.

While the changes are welcome, the ageing roots are still present. You can’t escape the blingy touches that just end up looking cheap and tacky.

A key example of this are the air vents which have obnoxious interior ambient lighting in them to try and make the cabin look cool.

I’m also not a huge fan of the star pattern trim on the dashboard and the swathes of stainless steel-looking inlays.

The RX300 is a five-seater SUV and, while it would be even more practical if there was a third row, the cabin is impressively spacious.

Have a look at my photo of the entry to the RX300's back seat – that's a big doorway  for a car. Parents will understand the value of wide-opening doors and these ones made it easy for my child to climb into his car seat and for me to buckle him up. Head and legroom in the back seats are also good, even for me at 191cm tall, while the flat floor makes it easy to 'scoot' across from one side to the other.

There are two cupholders in the fold-down centre armrest in the back and small door pockets, but storage up front is better, with huge pull-out door pockets, two more cupholders and a large centre-console bin.

There's a wireless charger in the hidey hole in front of the shifter, plus six USB ports on board - the rear passengers have two of their own in the back of the centre console and the rest are up front.

The second row doesn't come with climate control, but the directional air vents back there got a workout over the 40C days we had over summer.

The RX300's boot has a cargo capacity of 506 litres, measured to the top of the second-row seat back.

Now,  the media system. Yes, it's a tech thing, but I'm calling out it out as impractical. The functionality of the trackpad used to navigate around the screen is frustratingly awkward. I think 12 swear words in a row came out of me on one occasion (no child on board, obviously), just trying to use the sat nav. The layout of the display menu is also confusing and non-intuitive.

Up front the driver’s seat is comfortable, offering electric adjustability and lumbar support, extendable thigh support and heating. Some extra bolstering on the seat base would be nice though as it’s a little flat for my liking.

While the glossy piano black touch sliders on the steering wheel aren’t the most intuitive, I love holding this leather-wrapped wheel as it straddles the line of being thick enough but not too thick. BMW should take note…

The thin stalks behind the steering wheel are a joy to use and have a nice thwack to them. I appreciate the column-mounted gear selector as this frees up more space on the centre console, though it could be utilised better. More on this in a bit.

The digital instrument cluster offers a range of different themes to select from, though the standard version looks the nicest and offers the most customisation. It’s nice being able to put a full-width map display on the instrument cluster.

The touchscreen multimedia system offers a clean and intuitive interface that’s hard to get lost in. For the most part, however, I ended up using smartphone mirroring. Thankfully this update brought wireless Apple CarPlay and Android Auto.

It’s nice having the row of physical climate control switchgear within easy reach especially as carmakers are now integrating these into the touchscreen interface. Even Mercedes-Benz is guilty of this in its newer cars.

There isn’t a tonne of general storage on the centre console beyond the deep central box which has a split-opening lid. The wireless charger barely fits my iPhone 15 Pro Max, the cupholders are on the small side and the aforementioned storage section where the touch slider once was is useless from a storage standpoint.

Moving to the second row, it’s rather spacious for a small-ish SUV. At a leggy 182cm tall, I have plenty of leg and headroom behind my own driving position.

You’re able to slide and recline each individual seat in the second row to prioritise second-row comfort or allow more space for third-row passengers. It’s needed because third-row space is tight!

Second-row amenities include air vents mounted on the back of the centre console, various storage spaces, two USB-C ports, as well as a fold-down armrest with cupholders. Also if you stare at the back of the centre console it looks very much like a screaming face.

As already mentioned, the third row isn’t the most spacious ever, although this is a small-ish SUV so best not to expect palatial levels of room. It’s likely more for occasional use by children and it’s good to note there is airbag coverage back there.

Amenities are few and far between in the third row, limited to just a few storage spots and a USB-C port on both sides. Unfortunately there are no air vents.

At the back there’s a handsfree power tailgate which is handy if you’ve got your hands full. It opens swiftly, though with all three rows of seating upright there isn’t much room at all. Mercedes-Benz doesn’t even quote a boot capacity figure, but it’s only enough for a bag or two.

Thankfully if you’re not using the third row the benefit of this car is there’s much more boot space than the GLA. Mercedes-Benz claims there’s a generous 565L of boot space, which can further expand to 1800L with the second row folded.

Unfortunately there is no spare wheel in the GLB200 as it has run-flat tyres as standard, though regular tyres with a tyre repair kit is a no-cost option.

The Mercedes-Benz GLB200 is currently priced at $67,600 before on-road costs.

There aren’t many premium seven-seat SUVs that are this compact out there. The closest rivals would be the mid-size Volkswagen Tayron and related Skoda Kodiaq.

But for this price you can easily get something larger like a Kia Sorento, Hyundai Santa Fe or Mazda CX-80. You do have to ditch the premo badge though.

For your money you do get a generous amount of standard equipment. This includes 19-inch alloy wheels, LED headlights, dual 10.25-inch screens, wireless Apple CarPlay and Android Auto, interior ambient lighting, as well as heated front seats with electric adjustment.

However our tester was optioned with a panoramic glass sunroof ($1900) and black leather upholstery ($1539), bringing the as-tested price to $71,039 before on-road costs. This is still around $18,000 off the cheapest GLC.

A nifty reason for opting for this car over the GLA is because there’s a third row of seating. It's not the most spacious row, but when folded there is more boot space. More on this later.

The RX300 has a 2.0-litre four-cylinder turbo-petrol engine making 175kW and 350Nm, with a six-speed automatic transmission. This peppy four-cylinder gives the RX300 a completely different feel to the lethargic-but-powerful oomph of the RX350 and its naturally aspirated V6, even though it doesn't make a great deal more grunt, at 221kw and 370Nm. There's a difference in fuel consumption, too – find out how different below.

Is the RX300 all-wheel drive? Nope, it's a front-wheel drive. Only the RX350 and RX450h are AWD.

The Mercedes-Benz GLB200 is powered by a 1.3-litre turbocharged four-cylinder petrol engine which produces 120kW and 270Nm.

This engine also features in ‘200’ versions of the A-Class, CLA and GLA, plus versions of it also feature in the Renault Arkana, Captur, Duster, and Kangoo, as well as the Nissan Qashqai and now the new Mitsubishi ASX.

It’s mated to a seven-speed dual-clutch automatic transmission with drive sent to the front wheels only.

Unlike the more powerful GLB250 and AMG GLB35 all-wheel drive trims, the GLB200 is the only model to go without 48V mild-hybrid assistance in Australia. It was originally promised when this facelifted model was announced in 2023.

Mercedes-Benz claims the GLB200 can do the 0-100km/h sprint in 9.3 seconds and top speed is 207km/h.

Lexus says the RX300, with its 2.0-litre four-cylinder turbo-petrol engine, should use 8.1L/100km of premium unleaded after a combination of open and urban roads. My own testing over 375.4km - taking in motorways, city and suburban call-of-daycare drop-off-duties - had our RX300 using 11.79L/100km, measured at the petrol pump. The real-world results almost always exceed that of the manufacturer's claims so you can expect the V6-powered RX350, with its claimed 9.6L/100km, to have a much higher mileage again after the same kind of usage.

Mercedes-Benz claims the GLB200 has a combined fuel consumption of 7.5L/100km.

During our urban and metropolitan-based testing, however, we saw an average of 9.0L/100km according to the trip computer which isn’t great but also not the worst I’ve seen. Expect this figure to balloon out further if you load more people onboard as the engine will have to work harder.

There is a 52L fuel tank which requires a minimum of 95 RON premium unleaded petrol.

Using my as-tested fuel consumption figure, this means the GLB200 has a theoretical range of up to 578km.

Good seats are the start of a good driving experience and I've not met a Lexus that doesn't have superb pews – from the uber luxury models, such as the LS500 and ES300, to sports cars such as the RCF or LC500, they all have supportive and comfy ones. Lexus somehow manages to  combine the comfort of a lounge chair yet still holds you firmly, all while placing you in a great driving position. The RX300 is no different. Large enough to fit me and my 191cm frame, yet bolstered enough to feel snug.

As for performance, the RX300, with its four-cylinder turbo-petrol engine with its six-speed automatic, is responsive and a bit hyperactive feeling. It's a very different sensation to piloting the RX350, which has a V6 and delivers its grunt in a more linear and lethargic fashion. Having driven both back-to-back I'd say the V6 and its eight-speed auto suits the RX personality better, but the 300 is a car that would have had a school report card that read: "Lots of potential, but lazy".

That said, plant the right foot and the RX350 will get the message to hurry up and can do the 0-100km/h sprint in eight seconds flat. The RX300 is keen but can't match it, with  a time of 9.2 seconds.

Either way, the ride comfort is excellent, although body control could be better - the speed bump and roundabout route I take to do the preschool drop off caused it to  get the wobbles, but give the RX300 a motorway and it'll cruise beautifully.

Forward visibility is good but vision through the tiny rear-quarter window (it's even smaller than it looks) while reverse parking isn't great.

While this 1.3-litre turbo engine may be sufficient in the smaller A-Class and GLA, it barely scrapes by in the GLB200.

Even with one person onboard the engine has to rev out the first few gears to around 3000rpm to keep up with traffic from the lights. It doesn't have the nicest engine note either.

It doesn’t help that the dual-clutch automatic can be a little vague from a standstill, taking a beat to kick into action. This is most noticeable when doing low-speed manoeuvres or reversing.

Although initial acceleration can be on the thrashy side, rolling acceleration while at speed is a lot more linear and calm thanks to peak torque coming on tap from 2000rpm. This means the car will only downshift when it needs to.

There are a few different drive modes you can select from, but the default ‘Comfort’ mode feels the most natural. ‘Eco’ does quell some of the rev flares during initial acceleration, though the engine feels much more tardy in general.

Linked with these drive modes are the adaptive dampers. This is a very comfortable car, especially on the standard smaller 19-inch alloy wheels as there’s plenty of tyre sidewall to absorb bigger bumps.

Coupled with this is sporty steering that’s direct and makes the car feel nimble despite its 1.7-tonne kerb weight.

It really is the best of both worlds because you get the fun and sporty characteristics from the steering, plus the comfort and supple feeling from the suspension. It’s hard to fault this set-up.

In terms of noise, vibration and harshness (NVH), if you look beyond the sometimes shouty engine, this car is quiet and refined. There’s some tyre roar at higher speeds, but many European vehicles have this trait.

It’s also a benefit that this car is a little older as there aren’t many safety system-related bings and bongs that distract from the cabin ambience.

The Mercedes-Benz GLB received a five-star ANCAP safety rating based on Euro NCAP testing conducted in 2019.

It received 92 per cent in Adult Occupant Protection, 88 per cent in Child Occupant Protection, 78 per cent in Vulnerable Road User Protection and 76 per cent in Safety Assist.

As standard there are nine airbags, autonomous emergency braking (AEB), blind-spot monitoring, rear cross-traffic alert, lane-keep assist, adaptive cruise control, front and rear parking sensors, as well as a surround-view camera.

A nifty safety feature is the Pre-Safe system which tightens the seatbelts and plays a tone when it detects an imminent crash.

There are ISOFIX child seat anchor points on the outboard second-row seats, as well as on the two third-row seats. All three second-row seats, plus the two third-row seats also have top-tether points.

Lexus recommends servicing the RX300 annually or every 15,000km, with the first three services capped at $595.

The duration of Lexus's factory warranty is four years/100,000km, which is a bit longer than BMW and Benz's coverage, but behind the five-year/unlimited-kilometre warranties of the mainstream brands.

The GLB200 is covered by a five-year, unlimited-kilometre warranty, like the rest of the Mercedes-Benz line-up.

Logbook servicing is every 12 months or 25,000km, whichever comes first, which is good if you do a lot of driving.

You can purchase a three-, four- or five-year service package which costs $3495, $4650 and $6185, respectively. With the latter this equals $1237 per service, which is expensive, although it is cheaper than the slightly larger GLC.