Mercedes-Benz GLS-Class VS Lexus RX
- Modest steering feel
- So-so warranty
- Pricey servicing
If you’re in the market for a full-size, seven-seat, luxury SUV you’re obviously living life large. Big family, lots of friends, dogs and cats, and heaps of activity - horses, boats, camping?
You’re aiming at a six-figure bullseye between $130,000 and around $150,000. On a three-year novated lease, somewhere around three grand a month.
Mercedes-Benz Australia invited us to experience the car on a launch drive across city, suburban and rural roads.
|Engine Type||3.0L turbo|
|Fuel Type||Hybrid with Premium Unleaded|
For those of us unlucky enough to remember the first Lexus RX to launch in Australia, the memories aren’t the fondest.
If you can’t remember it, just picture the stodgiest-looking SUV you can - make it so bland a mere picture of one could cure insomnia - dragging a glass-walled cube behind the rear wheels.
All of which makes the current-generation RX so incredible. I mean, just look at it; those big rims, the 3D-effect grille, the outrageous lines and creases. It’s about as far removed from its snooze-worthy predecessors as it is possible to get.
Little wonder, then, it has emerged as the second-strongest performer in the Lexus line-up. And with the RX recently refreshed (and with a seven-seat RX L model added for the first time) its high time we took a closer look at the Japanese premium brand’s large SUV.
Read More: Lexus RX 450h 2018 review: snapshot
Read More: Lexus RX 450hL 2018 review: snapshot
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Read More: Lexus RX 300 2018 review: snapshot
|Fuel Type||Premium Unleaded Petrol|
A comfortable and ferociously well-equipped offering (even from the cheapest trim level) - and with a very good ownership package to boot - the RX has earned its place high in the Lexus pecking order.
There are faster, more pulse-quickening SUVs available, of course, but as a sedate suburban warrior, the RX is hard to fault. For ours, we'd be opting for the bang-for-bucks sweet spot of the Luxury trim, paired with the punchy-but-efficient hybrid powertrain.
As mentioned, the GLS is big; a step up from the already substantial model it replaces. Built with the US market in mind, in fact it’s produced in Tuscaloosa, Alabama, it’s more than five metres long, close to two metres wide, and over 1.8m tall. And there’s more than three metres between the axles, a 60mm wheelbase increase over the previous model.
And despite the size of the canvas, the Benz design team has managed to make the GLS look like a modern Merc. Signature elements include obvious ones like the slatted grille with a couple of three-pointed stars on the nose.
But there’s also, the carefully chiselled twin ‘power dome’ bonnet, scowling LED headlights and vents to aid front brake cooling and smooth aero performance around the front of the car.
The big beast’s off-road intent is highlighted by extensions around the wheelarches, with big optional 22-inch rims sitting underneath. The fact they look right-sized for the car speaks volumes about its scale.
The racy AMG Line package is standard, and a recess and pronounced character line, tightening the lower waistline is a familiar Merc treatment, plus alloy roof rails toughen the look while dialling up practicality.
The rear is relatively simple, borderline generic, with tapered tail-lights offering the only strong whiff of design personality. But believe it or not, thanks to careful detail sculpting of the body, and smoothing underneath the car it boasts a drag figure of Cd 0.32. Outstanding aero performance for a large SUV.
The driver and front passenger are presented with a sweeping dashboard dominated by twin 12.3-inch digital screens, one primarily covering the instruments, and the central screen managing the MBUX media system, including audio, nav, phone integration, car set-up, and more, plus ‘Hey Mercedes’ voice control.
The overall feel is simple, and restrained, yet massively confident, with a subtle colour palette, large squared-off elements defined by brushed metal finishes, and an obvious, intense attention to detail, from the haptic controls to the beautifully finished, multi-function steering wheel.
And the standard Burmester audio system includes a two-way in-car communication function that subtly amplifies the driver and front passenger’s voices for those in the third row, and vice versa. Sheer genius.
This current RX is like the butterfly that’s emerged from the caterpillar-cocoon of the older models, looking plenty premium and serving up road presence by the bagful.
No matter which model you go for, you’ll find the angry 'Spindle Grille' up front (which, for ours, is reminiscent of the Predator’s toothy grin, while 20-inch alloys are an impressive size, and a very un-Lexus body kit wraps from the front end all the way around to the rear spoiler.
The interior (check out the interior photos for a closer look) is premium-feeling, if a little busy, with the doors and dash covered in a combination of soft-touch materials and padded leather.
The brushed aluminium-look central tunnel that separates the front seats is super wide, as it houses the cupholders, drive-mode selector and the strange mousepad that controls the entertainment system, but feels nice under the touch and becomes a kind of focal point in the cabin.
Space is obviously a critical factor here, and no surprise there’s copious amounts of it inside the GLS.
Front seat passengers enjoy plenty of breathing room, without feeling remote from one another, and there’s lots of storage in the shape of a large lidded box/armrest between the seats, a decent glove box, two big cupholders and jumbo door pockets with room for large bottles.
There’s one data-enabled USB port in the front, two charge-ports in the second row, and four in the third row. Shouldn’t be any complaints about powering mobiles, tablets or games.
The second row feels every millimetre the SUV limo. Simply getting in and out is made easier because an auto lowering function drops the car 25mm when one of the doors is opened.
I was able to sit behind the driver’s seat set for my 183cm position with heaps of head and legroom on offer. And there’s an extra 10cm of electrically adjustable travel to play with if those in the third row agree.
The fold-down centre armrest features a lidded storage tray and twin pop-out cupholders. There are netted pockets on the front seatbacks, and again, the door bins are big enough for large drink bottles.
Three adults across the rear is a breeze, there’s climate control ventilation, and a huge glass sunroof is standard. Rather than asking ‘Are we there yet?’ the kids will be disappointed when you arrive!
Then there’s what the Cleary family refers to as ‘the way back seat.’ A pair of third row seats for the lucky kids that get to inhabit their own little world. Getting in and out is relatively civilised thanks to electric slide and tilt for the second row seats, and space is generous. I could sit comfortably, so the kids will be all smiles.
With all seats upright cargo capacity is enough for a seven-person day trip (355L VDA). Press the button to fold the 50/50 split-fold third row down and your options expand substantially (890L). And with 40/20/40 split-folding second row lowered, transportation of a full, three-ring circus is on the cards (2400L). Overall, more space than the arch enemy BMW X7.
Plus, the ability to lower the car 50mm thanks to the standard air suspension makes life even easier. And one button lowers the second and third rows at the same time.
The spare is a collapsible space-saver, and towing capacity for a braked trailer is 3500kg, with a tow ball weight of up to 140kg. The ESP system also features a trailer stabilisation function that counters oscillation with “braking intervention.”
With dimensions stretching 4890mm long and 1895mm wide, the RX sits squarely in the large SUV category, and there’s plenty of space for riders in both the first and second row.
Up front, there is a cup holder for both driver and passenger and extendable pockets in each of the front doors, and the deep cubby that separates the front seats adds plenty of storage space, and is home to two USB connections, a power outlet and and aux connection, but there is no sunglass holder.
The interior dimensions ensure there’s plenty of space in the back seat, although the central stack that houses the air vents and another power outlet does jut out into the rear legroom of the middle-seat passenger. There are two bonus cupholders hidden in a pulldown divider that drops from the middle seat, and two ISOFIX attachment points along the backseat.
Open the automatic tailgate (by waving your hand in front of the Lexus badge) and you’ll find 453 litres of luggage capacity, with boot space increasing to 942 litres by folding the backseat down. Theres’s a sliding cargo cover (the SUV version of a tonneau cover), too.
Price and features
Aside from the comprehensive suite of safety tech, covered in the Safety section below, the GLS equipment list includes, 21-inch alloy rims, adaptive high beam assist, air suspension, alloy roof rails, AMG body kit, a huge panoramic sliding glass sunroof, privacy glass from the B-pillar back, auto tailgate, keyless entry and start, rain-sensing wipers, cruise control, LED headlights, and power closing doors.
The power closing doors are a big plus for parents not wanting to disturb kids nodding off in the car, with the soft-touch function drawing the door in for the last few millimetres to an almost silent close.
Inside there’s ambient lighting (64 colours), strategically placed open pore oak wood trim, 13-speaker/590-watt Burmester surround sound audio, electric folding second and third row seats, a head-up display, ‘Mercedes-Benz’ branded illuminated sills, leather seat upholstery (‘Artico’ faux leather on the dash and doors), multi-adjustable electric seats in the front and second row (memory in the front), electrically adjustable steering column, leather-trimmed multi-function steering wheel, and five-zone climate control.
The multi-media system is spectacular, incorporating the twin 12.3-inch digital screens, the central media unit managing nav, digital radio, mobile device connectivity, Apple CarPlay and Android Auto, plus vehicle tracking. There are also remote vehicle status functions (door locking, valet parking, etc), global search (Amazon Alexa, Google Home, Yelp, and Trip Advisor), and a wireless device charging pad.
The basket of goodies can hold its head high in this part of the market, so the value equation stacks up well.
The Lexus RX arrives in plenty of trim and engine combinations, so exactly how much yours will cost is largely up to you.
The minimum RRP, though, is $74,251, which will buy you an RX300 Luxury. A little further up the price list lives the RX350 Luxury, at $81,421, which makes use of a bigger engine, while the hybrid RX450h Luxury will set you back $90,160.
The range then steps up to the second of three trim levels, the F Sport, for which you’ll be paying $86,551 for the RX300, $93,721 for the RX350 and $102,460 for the RX450h.
Finally, the range tops out with the Sport Luxury trim, which will push the budget to $92,701 for the RX300, $99,871 for the RX350 and $108,610 for the RX450h.
Okay, so that’s what you’ll be paying. But take a deep breath now, we’re dive into the model comparison.
Even the Luxury-badged cars are a premium package, arriving with 20-inch alloy wheels, tinted windows, a powered tailgate, LED headlights and fog lights (with daytime running lights) , a smart key with keyless entry, roof rails and rain-sensing wipers. Inside, expect a laundry list of standard features, including dual-zone climate control, sat nav (which, as far as GPS navigation systems go, is a breeze to operate), push-button start and leather trim.
Your 8.0-inch screen (it’s not a touch screen) pairs with digital radio and 12 speakers, there’s Bluetooth for your MP3s, as well as wireless charging (though iPhones require a special case), and you get heated and cooled front seats, too. Be warned; there is no Apple CarPlay or Android Auto anywhere in the range.
Step up to the F Sport - a pseudo sport edition - and you’ll add a bigger, 12.3-inch infotainment screen that adds a CD player and DVD player and pairs with a better Mark Levinson sound system complete with 15 speakers (including a subwoofer). You get a new colour head-up display (HUD), too, and a whole heap of sport-flavoured styling flourishes.
Compare that to the Sport Luxury, which adds with soft leather trim elements, heated seats in the second row (vs just the front seats on the F Sport trim) and a power folding function for the backseat. There’s no heated steering wheel here, but then, who needs one in Australia? The adaptive front lighting system cn be switched off, too, should you prefer the traditional approach.
Colours include 'Titanium' (metallic grey), 'Sonic Quartz' (white), 'Premium Silver', 'Onyx' (a kind of black), 'Graphite Black', 'Vermilion' (red), 'Metallic Silk' (rose gold), 'Deep Metallic Bronze' (a fancy brown) and 'Deep Blue'.
How many seats? That would be five. If you want a third row seat, then you’re shopping for the RX L, as the standard RX is strictly a five-seat affair.
A thick accessories catalogue includes specialty floor mats, roof rack and boot liner options, bull bar, nudge bar and rear seat entertainment system options, as well as a panoramic sunroof, which will set you back $3675. You won't find Homelink though (which automatically opens your garage door), as it's yet to be made available in Australia.
Engine & trans
There are two engines on offer. The 3.0-litre (M256) in-line six-cylinder turbo-petrol GLS 450 4Matic, and the 2.9-litre (OM656) in-line six-cylinder turbo-diesel GLS 400 d 4Matic.
The all-alloy, twin-scroll single-turbo petrol engine delivers peak power of 270kW from 5500-6100rpm, and maximum torque of 500Nm across a broad plateau from 1600-4500rpm. It also features a 48-volt electrical system driving the ‘EQ Boost’ set-up, able to deliver an extra 16kW/250Nm for short periods. The integrated starter-generator also enables energy recuperation.
Although the all-alloy, twin-turbo diesel features variable valve lift it gives some ground on power, offering up 243kW between 3600-4000rpm, but torque is a solid whack, with 700Nm on tap from 1200-3000rpm. Worth noting, that to minimise emissions this engine features a “selective catalytic reduction converter” in the exhaust, which brings with it the use of an ‘AdBlue’ reducing agent. The separate AdBlue tank has a capacity of 31.6 litres.
The nine-speed auto transmission is the same in both versions, although the diesel has a slightly lower final drive ratio.
There are three (petrol) engine size options on offer; a turbocharged 2.0-litre in the RX300, a punchy V6 in the RX350 and a hybrid set-up in the RX450.
First up, the four-cylinder turbo engine serves up 175kW/350Nm (decent specs for a smaller engine), channelling it through a six-speed automatic gearbox and sending it on to the front wheels.
The six-cylinder petrol engine is good for 221kW/370Nm, sending that power to all four wheels via an eight-speed automatic transmission.
The hybrid (it’s not a plug-in hybrid) option uses the exact same engine, but paired with an electric motor that lifts the total output to 230kW/335Nm. That combination pairs with a CVT auto, sending its horsepower to all four wheels.
All are petrol powered (there are no diesel or LPG options, and no manual transmission, for that matter), and for ours, the combined engine specs of the hybrid powertrain make the most - and most expensive - sense.
While the Luxury, F-Sport and Sport Luxury models all have adjustable drive modes (including Eco mode), tweaking throttle response and gearing, only the Sport Luxury serves up true variable suspension.
The F Sport and Sport Luxury also make use of the Lexus AWD system (though 4WD aficionados will notice the lack of low range that prevents it being a true 4x4). The RX300 is front-wheel drive, with no rear-wheel drive options anywhere in the range.
Expect a braked towing capacity of at least 1000kg (provided you’ve picked a tow bar/tow hitch receiver from the accessories catalogue) with a gross vehicle weight that starts from 2500kg.
For reported problems and maintenance, including transmission problems, battery and oil type, and changing your timing belt or chain, see our owner’s page.
Claimed fuel economy for the combined (ADR 81/02 - urban, extra-urban) cycle for the GLS 450 is 9.2L/100km, the more frugal GLS 400 d trimming that to 7.7L/100km. The petrol 450 emits 210g/km of CO2 in the process, the diesel 400d dropping that slightly to 202g/km.
Stop-start is standard, you’re looking at premium unleaded for the 450 GLS, and you’ll need 90 litres of dinosaur juice to full the tank on both models.
For the smaller, turbocharged engine, Lexus claims fuel economy of 8.1 litres per 100km on the combined cycle, with emissions pegged at 189g/km of CO2. Stepping up to the RX350 increases fuel consumption numbers to 9.6L/100km and 223g/km, while the hybrid gets by with impressive mileage of just 5.7L/100km and 131g/km.
Expect a 72-litre fuel tank that requires 95RON fuel in the 300 and 350, while the hybrid’s fuel tank capacity is 65 litres.
Merc claims the GLS 450 will sprint from 0-100km/h in 6.2sec, and the 400 d in 6.3sec. Not hanging around for a 2.5 tonne mothership. But the standout is the 400 d’s torque. All 700Nm of it available from just 1200rpm to 3000rpm; right in the mid-range sweet spot.
The nine-speed auto transmission is smooth yet responsive, with paddles on the wheel for manual shifts when you want to pick the ratio. The combination of effortless grunt and the nine-speeder keeping things on the boil is an impressive one.
Suspension is by double wishbones at the front and multi-links at the rear, and while you can feel the weight in cornering, the standard Airmatic air suspension (which does away with steel springs) is superb in terms of ride comfort and body control.
We took a deep breath and pushed enthusiastically through a series of sweeping corners and the fat (285/45 fr - 325/40 rr) Continental ‘PremiumContact 6’ rubber wrapped around our car’s (optional) 22-inch rims gripped hard.
The ‘4Matic’ all-wheel drive system also seamlessly shuffles torque between the front and rear axles (theoretically up to 100 per cent in each direction).
Merc has put extra focus on body rigidity, the tuning of engine and suspension mounts, and sound absorption, and it shows. The GLS 400 d is beautifully refined on the highway. A neat touch is the car automatically lowering 15mm at motorway speeds or when ‘Sport’ mode is selected.
Steering is electromechanically assisted, and Merc says the front suspension geometry has been revised to minimise vibration through the wheel. And yes, feedback is minimal, but unfortunately so is road feel with only a general connection between your hands on the wheel and the front tyres on the bitumen.
When you’re steering a large beast like this, often with something substantial hitched to the back, you want to know braking performance is up to the task, and the GLS’s big ventilated discs all around deliver reassuringly strong stopping power, with nice, progressive pedal feel to boot.
The seats are adjustable six ways to Sunday, but beyond that they’re comfortable and supportive, even over long stints behind the wheel.
We stayed on the bitumen, because, let’s face it, that’s where this car will spend 99.9 per cent of its time, with the exceptions of the boat ramp, a ski weekend or pony club.
For those special occasions the optional ‘Off-road engineering package’ adds a low-range transfer case, inter-axle locking, hill descent control, and under body armour for more serious work.
If BMW serves up the 'ultimate driving machine' and Mercedes delivers 'the best or nothing', then surely the review tag line for the RX SUV range should be 'easy like a Sunday morning'.
Sure, there are sportier-feeling SUVs - and faster ones, too - but there is an easy comfort to the way the RX goes about its business that you’ll undoubtedly appreciate more frequently than you would harder suspension, more in-touch steering and the endless pursuit of speed and 0-100 performance figures.
For the record, though, the hybrid cars will sprint from 0-100km/h in a brisk 7.7sec, a smidge quicker than the 8.0sec of the regular V6. The RX300 records a far more leisurely 9.2sec.
Probably most impressive, the RX doesn't feel overly large and cumbersome, and nor does its turning radius, and it’s equally at home in the cramped inner city as it is eating up kays on the freeway. The six- or eight-speed transmission is silky-smooth seamless, switching between cogs without you even noticing, and the cabin is commendably quiet - especially when you're coasting though the ‘burbs - locking the worst road noise outside out of the cabin.
You can inject a little excitement by selecting 'Sport' or 'Sport +' via the central dial, tweaking the accelerator and steering settings, and in Sport Luxury cars, firming up the suspension, removing some of the lolling about in corners, though there’s no air suspension.
While the F-Sport and Sport Luxury cars are AWD-equipped, the off road capability is hampered somewhat by its ground clearance, big chrome-look wheels and skirtings. This is an SUV built for the city over the bush, but you likely don’t need us to tell you that.
At the time of this launch drive the GLS hadn’t been safety assessed by ANCAP, but you could make a small wager, like every penny you have to your name, that it will score a maximum five stars.
The expected active features are there, including ABS, ASR, and ESP, with additional tech including ‘Active Blind-Spot Assist’, ‘Active Brake Assist' (Merc-speak for AEB), active lane keeping and lane change assist, ‘Adaptive Brake’, ‘Attention Assist’, ‘Evasive Steering Assist’, ‘Parktronic’ (active parking assist with 360-degre camera), rear cross-traffic alert, traffic sign assist, and a tyre pressure warning system.
Then, if all that isn’t enough to avoid an impact the GLS is equipped with nine airbags (front and pelvis side for driver and front passenger, side for outer rear seat occupants, full-length curtain, and a driver’s knee bag), an active bonnet to minimise pedestrian injuries, and the ‘Pre-Safe Plus’ (flashes rear hazards to warn drivers closing too quickly from behind, tightening the belts at the same time, and locking the brakes if the GLS is stationary with a rear impact imminent).
Even the cheapest RX (which, admittedly, isn’t all that cheap) arrives with a long list of standard safety features, including a reversing camera, blind spot monitor with rear cross-traffic alert, AEB, lane assist and parking sensors (but no park assist).
You’ll also find 10 airbags, and twin ISOFIX mountings for you baby car seat, as well as cruise control and the usual suite of braking and traction control systems.
The Lexus RX received a five-star ANCAP safety rating, the best possible ratings outcome, when tested in 2015. The Lexus RX is built in Japan.
The Mercedes-Benz range is covered by a three year/unlimited km warranty, which, like Audi and BMW continues to lag behind the mainstream market where the majority of players are now at five years/unlimited km, with some at seven years.
On the upside, Mercedes-Benz ‘Road Care’ roadside assistance is included in the deal for three years.
Service is scheduled for 12 months/25,000km (whichever comes first) with pricing available on an 'Up-front' or 'Pay-as-you-go' basis.
As a guide, service pricing for the outgoing GLS is set at $2600 per service (up-front) and $3250 (PAYG), a saving of $650 a pop. Fourth and fifth services are also available for pre-purchase ($3550 and $4900).
Expect a four-year/100,000km warranty (that's 12 months longer than BMW or Mercedes-Benz, so think of it as a kind of extended warranty), and the RX will require a trip to the service centre every 12 months or 15,000km.
Your first service cost is gratis, and the total maintenance cost for each service is available online - so there are no surprises at the dealership.
For common problems, complaints, issues and the like, visit our Lexus RX owner’s page. But your owner’s manual should be required reading, too. Traditionally, Lexus product ranks well in reliability ratings, resale value and initial value rating charts.