Subaru Outback vs Mercedes-Benz Gls450

What's the difference?

Over 30 years and seven generations of Outback in Australia, the latest might just be the best.

It's great to drive, even better to sit in, very easy to live and willing to go further than most equivalent large SUVs at its price point.

The styling is definitely divisive, with purists unhappy that the long, crossover wagon silhouette is now gone, but what we have instead is a family-friendly vehicle that pleases on so many fronts.

We’d go as far as saying the latest Outback might be the most-rounded Subaru currently available, and great value to boot. And the base AWD is all the SUV most people will ever need.

That’s not bad for something this square!

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

The GLS450d impresses as an entry-level grade, as it’s a more family-friendly allrounder than the specialised AMG and Maybach variants. Its combination of a torque-rich diesel 48V hybrid drivetrain, air-cushioned suspension and plush interior are as well suited to luxury urban travel as they are to grand touring, where its heavy towing and generous load-carrying capabilities can shine. Whether it’s worth around $200K drive-away, only those who shop at the top end of town can decide.

Historically, Subarus have majored on quirky. Kooky even.

Think buggy ‘60s 360, offbeat ‘70s 1400, spacey ‘80s Vortex, futuristic ‘90s SVX, Alfa-esque ‘00s pre-facelift Tribeca, dorky ‘10s Exiga. We’d go as far as saying that, in over 50 years, only a handful of Subarus have looked normal. And they’ve all been boring. The beautiful ones, like the original Impreza and ’03 Liberty, remain stunning.

But quirkifying such an important family car in such a mainstream segment… that's risky. And we’re here for Subaru’s boldness. We just wish the details weren’t so heavy handed.

Longer, larger and wider than any prior version, the 2026 Outback shares its stretched platform architecture fundamentals with the latest Forester. That’s a sound basis. Just Xeroxed up by about 15 per cent. Boxy shape. Deep glass. Wide doors. Form over function. This is designed to make life easier.

What you make of the Wilderness’ visual features, including the dramatic grille mask, SUBARU wording, painted trim surrounds and cladding-on-cladding (behold the Kia Tasman-like squared-off wheel arches if you dare) is down to personal taste. Eyes be damned! But it is so far-removed from the elegant grace of the previous model that some might argue a name change would at least have silenced the critics.

On the other hand, besides fugly being in Subaru’s DNA, a large, lofty SUV is probably truer to the term ‘outback’ than on any elegant and gracefully-silhouetted crossover wagon.

Meanwhile, the polar opposite is true inside. It’s as if the interior designers strove for class and calm, with none of the exterior styling’s visual noise, or shouting in the Wilderness’ case. And there is the luxury of space, vision and scope, further enhancing the Outback’s usefulness. That you can’t see the body, just the beautiful cabin’s detailing, elevates this Subaru. Unlike in the previous model, which was a bit of an aesthetic and functional mess inside.

This is an imposing vehicle in extravagant S-Class tradition, riding on an expansive 3135mm wheelbase and stretching more than 5.2 metres (5215mm) long and more than 2.0 metres (2030mm) wide with a turning circle that's nudging 13 metres.

However, it’s just under 1.8 metres (1798mm) tall, so there’s no clearance issues when accessing multi-storey carparks. And with its side-steps (or ‘running boards’ in nostalgic Benz speak) most adults can step rather than climb aboard, although passengers of shorter stature during our test noted that assist handles on the A and B pillars would be handy.

Central to its sophisticated chassis design is adaptive air suspension, which uses a pneumatic or ‘airbag’ form of springing with adaptive damping to continuously optimise ride comfort and handling response according to road conditions and driving dynamics (see Driving).

The GLS’s styling is clean and uncluttered with tasteful restraint evident in its chrome and satin-chrome highlights, yet it projects a majestic quality with its prominent four-louvre grille and elegantly spoked alloy wheels.

The spacious and sumptuous seven-seat interior is visually pleasing and practical, with a subtle blend of surface treatments, contrasting tones, lots of soft-touch surfaces and exposed stitching. This is combined (thankfully) with physical dials, switches and ‘piano key’ buttons to control numerous interior functions, in preference to distracting touchscreen prompts.

Like all Subarus, Outback boasts an interior of very high-quality craftsmanship, being built beautifully, without rattles or noises or jarring trim.

The difference here is just how pleasingly practical and easy yet attractive this environment is, from the moment that wide-opening door opens and shuts with reassuring solidity.

The horizontal dash layout departs from the Tesla-aping portrait screen domination of the previous generation, banishing the confusing and annoying virtual controls for real, live buttons.

But is it original? The layered presentation is attractive and distinctively Toyota… err Subaru. Yes, it is very much like the bZ4X-based Solterra EV’s look inside.

That’s no bad thing from an ergonomic point of view. The driving position is flawless, the seat/wheel/controls relationship considered and the placement of the climate controls, audio system, armrest and storage just right. We’re also happy to see the instrumentation display incorporate various visual choices, including digital analogue-style dials.

A particular callout goes to the slick and speedy tactility of the brand’s latest touchscreen, as well as the (again suspiciously Toyota-like) interface and graphics layout. It’s all good.

But wait, there’s more. The Outback’s front seats are claimed to be particularly supportive, and after hours in them on and off road, they seem to exceed Subaru’s claims.

If you’re expecting regular mid-sized SUV levels of interior space, be prepared to be impressed, because the Outback’s extra sizing outside seems to be multiplied inside. There’s ample room for long legs, big hats, broad shoulders and buxom hips. It all works so well. This is probably one of the best modern SUV interiors, period. Nothing seems to have been overlooked.

The rear seat is presented to please, too. It can seem a bit drab in the lower-line models, but the same virtues of effortless entry/egress, seat comfort, convenience (including air vents, USB ports, cupholders and armrest placement) apply. We noted the lack of road/tyre noise intrusion at speed, too.

Behind the very sixties Jeep Wagoneer-looking rear is a vast luggage area, complete with a low floor, remote rear-seat folding handles, 12V outlet and quality trim. And that space-saver spare lives underneath.

Subaru seems to have designed this car from the inside out and it shows. A rare 10/10 from us.

Although it has a hefty 2655kg kerb weight, our test vehicle’s 3420kg GVM rating provides a useful 765kg of load capacity, which should comfortably absorb the combined weight of up to seven occupants and light luggage. Or with the third row of seating folded, five occupants and heavier luggage.

It’s also rated to tow up to 3500kg of braked trailer and with its sizeable 6920kg GCM (or how much weight it can legally carry and tow at the same time) it can carry its maximum load while towing its maximum trailer weight.

So, that’s commendable practicality, given it would be well suited to owners that need to tow large caravans, boat trailers, horse floats etc in style without having to compromise much (if at all) on either passenger numbers or luggage capacity.

Driver and front passenger space and comfort is exceptional, as you’d expect. Storage includes a large glovebox plus a bottle holder and bin in each door. The front of the centre console has two USB-C ports, wireless phone charging and heated cupholders, while the rear of the console has a large storage box with a third USB-C port and padded lid that doubles as a comfy elbow rest.

Even tall passengers in the second row of seating enjoy spacious comfort, given I’m 186cm and with the driver’s seat set in my position I have ample knee clearance, foot room and head space.

However, the central passenger must contend with a transmission tunnel in the floor and shoulder room would be squeezy for three large adults, which is okay for short trips but a maximum of two would be ideal for longer journeys.

The rear of the centre console also treats second-row passengers to a pair of USB-C ports, adjustable air-vents and a control panel that allows independent climate adjustment.

There’s also a large bin/bottle holder in each door plus storage nets on each front seat backrest. The centre seat backrest folds flat to allow long items (skis etc) to slot between the outer backrests. And it also serves as a fold-down armrest, containing two cupholders and a lidded slimline compartment that’s ideal for hidden phone storage.

The third row is uncommonly spacious, even for tall people, with padded armrests on each side containing cup holders and twin USB-C ports.

The carpeted rear luggage area has four load-anchorage points, a first aid kit and 12v socket. With the third-row seats upright it offers 355 litres of load volume, which increases to 1350 litres with the third row folded and 2400 litres (or 2.4 cubic metres) with both the second and third rows folded.

Our Polar White test vehicle, which is the base grade in the three-tiered GLS range, comes standard with a 3.0-litre inline six-cylinder turbocharged diesel engine with 48V mild hybrid technology, nine-speed automatic transmission, permanent all-wheel drive and active air suspension for a list price of $189,100.

This pricing is higher than comparative entry-level grades offered by the two marques which dominate sales leadership in this segment, comprising the BMW X7 xDrive40d M Sport ($179,500) and Lexus LX500d AWD ($158,700).

The GLS450d’s standard features include 22-inch AMG alloy wheels with Continental 325/40 R22 tyres and a collapsible spare, ‘AMG Line’ body styling enhancements, aluminium-look illuminated side-steps with non-slip rubber studs, multi-beam LED headlights and more.

Step inside the keyless interior and you’ll find ‘Hey Mercedes’ voice activation, fingerprint scanner (which memorises individual comfort settings for up to seven users), panoramic sunroof, heat-insulating dark-tinted rear privacy glass and the ‘Premium Plus Package’ that includes heating/cooling for the front seats, heated rear seats, head-up display, separate front/rear climate control zones, heated cupholders and more.

There’s also a concert hall-like Burmester surround sound system controlled by a central touchscreen with digital radio and Apple CarPlay and Android Auto connectivity, plus wireless phone charging, multifunction Nappa leather sports steering wheel and USB ports front and rear.

Driver assistance includes the ‘Parking Package’ (360-degree camera, active parking assist and transparent bonnet), ‘Mirror Package’ (auto-dipping rear-view mirror and electric folding door mirrors with puddle lamp projection of the brand logo) and ‘Driver Assistance Package’ (blind-spot assist, exit warning, speed sign recognition, lane keeping etc) all included as standard equipment.

Of course, Mercedes-Benz offers numerous extra-cost options including a 3500kg towing package plus interior, exterior, suspension and wheel enhancements (including Nappa leather trim) for those who want their GLS with the lot, which can easily push the list price beyond $200K.

Don’t worry, Subaru traditionalists. The Outback again offers a pair of horizontally-opposed 'boxer' four-cylinder engines.

The regular Outback versions are powered by a 2.5-litre twin-cam petrol unit making 137kW of power at 5800rpm and 254Nm of torque at 3700rpm.

Choosing the Wilderness switches things up to a 2.4-litre turbo version delivering 194kW at 5600rpm and 382Nm between 2000rpm and 3600rpm.

Both use a continuously variable transmission (CVT) with eight artificial ‘steps’ for a more torque-converter-like experience. Sadly, no manual gearbox is available.

The GLS450d comes standard with a 3.0-litre turbocharged inline six-cylinder diesel producing 270kW of power at 4000rpm and 750Nm of torque between 1350-2800rpm.

This is paired with a 48V mild-hybrid system comprising a 48-volt battery (charged by regenerative braking) and an integrated starter-generator which provides both seamless engine stop-start and up to 15kW/200Nm of extra power and torque during acceleration.

A nine-speed torque converter automatic provides the choice of manual shifting using the steering wheel-mounted paddles, along with several selectable drive modes.

The active all-wheel-drive system continuously adjusts the engine’s torque delivery between front and rear axles (and individual wheels as needed) to maintain optimum traction and handling.

Where the Outback regresses compared to its predecessor is efficiency.

Despite a modest 50kg weight rise, the substantially boxier shape is probably behind the jump in petrol consumption, rising nearly one litre per 100km compared to before in the Outback, and nearly 2.5L/100km, in the heavier Wilderness.

The combined average consumption figure for the 2.5-litre naturally aspirated engine is 8.1L/100km, for a carbon dioxide emissions rating of 183 grams per kilometre, while the 2.4-litre turbo manages 9.7L/100km and 228g/km.

Filling the 63L tank, expect an average range of about 777km in the former and just 648km in the latter. Surely, the coming hybrid version can’t arrive soon enough for some buyers.

At least both engines can drink from the standard 91 RON petrol bowser.

So much for the theory. Out in the real world, over a solid day's testing on- and off-road, we found there was a difference of about 1.5L/100km between the regular Outback and the Wilderness.

Mercedes-Benz claims official combined consumption of 7.8L/100km and the dash display was showing 9.0 when we stopped to refuel at the completion of our 368km test, which included the usual mix of suburban, city and highway driving with up to five passengers at times and light luggage.

Our own figure, calculated from fuel bowser and tripmeter readings, was close at 9.5 which is outstanding sub-10L/100km economy for such a substantial vehicle in mostly metropolitan use. Therefore, based on our own consumption figure, you could expect a real-world driving range of around 950km from its 90-litre diesel tank.

Confession time. The way the previous Outback drove was profoundly disappointing. The steering felt numb, the ride was too stiff and the car seemed wilfully dull, even in the turbo version.

The contemporary Forester ran rings around it for driving pleasure and refinement.

But Outback number seven is completely different and maybe the best-driving non-WRX Subaru right now.

From the moment you climb on board this vast SUV from Japan, everything feels right – from the driving position and relationship with the controls, to the sumptuously comfy seats and commanding vision all around the vehicle. That’s a promising start.

Push the ignition and press the accelerator down, and the regular Outback 2.5 quietly, gently and smoothly moves off the line. With modest power outputs and a CVT, you might expect it to also sound revvy and droney, but instead the acceleration is strong and throttle responses determined.

We drove this for hundreds of kilometres and never found the performance lacking, even with three adults and their luggage on board, over hilly and even mountainous terrain. Yes, it is possible to have the CVT whining at higher revs, but not within normal driving scenarios. And the quietness and lack of road noise is terrific.

Moving to the Wilderness and its 2.4-litre turbo powertrain, the same applies, except of course mid-range response is significantly faster and with a slicker, more refined delivery. Press and squirt, this is deceptively quick, because the car does a great job in masking the noises and vibrations that working an SUV hard often elicit.

We only wish there was a manual option. With steel wheels, cloth seats and without the Wilderness' add-on gargoyles.

Now, it also seems that Subaru listened and learned from previous criticisms like ours, because the Outback’s newly-redesigned steering is a delight, with a natural, fluent sweetness and ease that’s combined with a pleasing connection with the driver.

The result is balanced, controlled and enjoyable handling, backed up by reassuringly stable road holding. We drove through a sudden, heavy thunderstorm near Bathurst on the first, hot summer afternoon’s test session, and found the Outback to feel impervious through such slippery conditions.

And this all largely applies to the Wilderness as well, though its 20mm-higher ground clearance (to 240mm) makes it feel a little less composed than the glued-down regular model. Both feature a stiffened body and multi-link rear suspension, by the way.

More progress has been made in the Subaru’s ride quality. Gone is the hard suspension feel, for a far-less firm set-up, providing a comfortable and queasy-free ride. Even in the loftier Wilderness. This is the model’s greatest advance over its predecessor and we’re extremely happy with the outcome.

Finally, other than the at-times over-eager driver-attention monitor, the ADAS tech provides subtle, nuanced back-up, with quiet lane-keep intervention, a measured adaptive cruise-control functionality and no jarring buzzes and warnings.

We also enjoyed a session taking both grades off road, to show off their 4WD prowess. The clearances are ample, the hill-descent tech effective and the ability to scramble over wet rocks impressive. The Wilderness especially may even live up to its name!

This is a difficult SUV to fault. The Outback’s breadth of capability on and off the beaten track give it an unusually wide bandwidth for what is a monocoque bodied family convenience. That there is so much sophistication and fun to be had as well make this so much better to drive and live with than the disappointing old version.

We can’t wait to get to know the latest Subaru better on more familiar roads.

It’s an enjoyable vehicle to drive, with multiple power adjustments for the seat and steering wheel combined with a large left footrest which provide supreme driver comfort and support.

The powerful and responsive turbocharged six-cylinder diesel and nine-speed auto are well suited to this application. The engine’s ample torque provides spirited acceleration from standing starts, taking only six seconds to reach triple-digit speeds.

This drivetrain would be well suited to heavy towing duties, given the 48V mild-hybrid system can contribute an extra 200Nm (in addition to the engine’s 750Nm), which raises the total theoretical torque output to almost 1000Nm.

The active air suspension provides a wonderfully cushioned ride that floats over bumpy roads, while maintaining excellent handling response and surprising agility. These commendable chassis dynamics, combined with the powerful and responsive drivetrain, makes the vehicle feel smaller and lighter than its dimensions and kerb weight would suggest.

Overall, it’s difficult to fault from a driver’s perspective, with the only exception being the voice activation function. This is often triggered by words or phrases other than ‘Hey Mercedes’ resulting in regular interruption of conversations. This needs some fine tuning.

The GLS does not have an ANCAP rating as it’s yet to be tested, but comes standard with a suite of passive and active safety features including nine airbags, auto emergency braking (AEB) with pedestrian detection and junction assist, blind-spot monitoring, traffic sign recognition, head-up display, rear cross-traffic alert, lane-keeping, adaptive cruise control with ‘distance assist’ (autonomously brakes/accelerates in heavy traffic), front/rear parking sensors, 360-degree camera and more.

There’s also two ISOFIX and three top-tether child seat anchorages in the second row, plus two more of each in the third.

Subaru offers a five-year/unlimited kilometre warranty, and that also comes with 12 months of roadside assistance.

Now, that's pretty average nowadays, so nothing special, particularly when other SUV companies like Mitsubishi, Nissan and MG offer conditional 10-year warranties.

Service intervals are at 12 months or 15,000km for both engines. There is a capped-price servicing offer covering this timeframe. They are currently listed at approximately $350, $530, $405, $705 and $370 for an average of $472 per workshop visit.

There are 128 dealers or authorised Subaru service centres across Australia as of January 1, 2026.

The GLS comes with a five-years/unlimited km warranty (better than BMW and Lexus) and five years of roadside assistance. Scheduled servicing is every 12 months/25,000km whichever occurs first.

Mercedes-Benz offers capped-price pre-paid servicing packages with three, four or five-year terms. For example, the total upfront cost of the minimum three-year term is $4090, or an average of $1363 per service.