Mercedes-Benz GLC-Class vs Subaru Outback

What's the difference?

Like I said right from the start, this new, hybrid version of the AMG GLC63 is technically superior to the model it replaces in every meaningful way. It is faster, more powerful and more fuel efficient and therefore a better performance SUV than the model it replaces.

Is it a better model than the one it replaces? Ultimately that will come down to how much stock you put into the soundtrack and your feelings on an AMG not powered by a V8 engine.

Because if you can see past that, then the AMG GLC63 is an absolutely fantastic performance SUV. Not only does the new powertrain make it faster in a straight line, but the chassis is very well-balanced, making for an engaging driving experience.

For those who can look past the smaller engine they will be rewarded with an incredibly fast and rewarding-to-drive member of the AMG family.

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

The Subaru Outback Sport Touring XT is what you get when you want a beefed-up station wagon masquerading as an SUV that can handle adventuring and haul the family around in comfort. The limited edition has all of the great features you'd expect from a top model and a reasonable price tag but its fuel thirst will turn some people off.

The GLC63 is unmistakably an AMG from the moment you first lay eyes on it. That’s thanks to the AMG-specific elements, starting with the grille with vertical strikes and the AMG crest on the bonnet; which is now a signature item for the performance sub-brand.

The GLC63 is also fitted with the Night Package II design kit; this adds a darkened grille and black chrome badging to further enhance its visual appeal.

The AMG-specific alloy wheels and more aggressive stance do mean the GLC63 stands out from the rest of the GLC range, helping it look fast even when it’s standing still.

The Sport Touring XT model is only available in the exclusive Geyser Blue paintwork (you'll either love it or hate it), has green accents scattered across the body and sports sharply styled and dark 18-inch alloy wheels.

The rear gets black badging and a spoiler but the black plastic moulding that Subaru is well known for is well and truly present.

There are some small design differences between the limited edition and it's siblings but at the end of the day it looks like an Outback.

Head inside and you'll find a solid and well-built cabin. The dashboard features a flashy 11.6-inch tech screen but the instrument cluster is still mostly analogue with a small 4.2-inch screen.

There are heaps of buttons and dials to play with and you also get a proper gear-shifter. The design will make this a winner for folks who want a car to look like a car, with its controls where they expect them to be.

Overall, the cabin feels premium but isn't fussy.

Inside the GLC63 is clearly a derivative of the rest of the range, with its C-Class-inspired design and layout, but there’s enough AMG-specific elements to ensure it looks and feels special. This starts with the AMG steering wheel, which comes not only with a thick rim wrapped in Alcantara, but also some AMG special dials to adjust the various performance settings for the powertrain, suspension and transmission.

Then there are the AMG-specific seats, which look good and offer good support for the driver and front seat passenger. The rear seats offer decent space for what is a mid-size SUV, with room enough for two adults or teenagers or three smaller kids.

Those in the back aren’t particularly well looked after though, with only rear air-con vents and small door pockets but no USB charging ports or other small item storage.

The boot is 590 litres, down from 620L in the rest of the range, thanks to the addition of the rear-mounted electric motor. There’s also no room for the temporary spare the rest of the GLC range gets and instead you have to make do with a puncture repair kit.

The cabin of the Outback has always been practical but the premium features this grade comes with ensures proper comfort for all occupants.

Seat comfort is high with the powered front seats that have heat and ventilation functions but the driver benefits the most with the extendable lumbar- and under-thigh supports.

The rear row is almost as comfortable as the front where passengers feel secured by the padded side bolsters, while taller occupants will love the head and legroom on offer. The heat function for the outboards is appreciated and the directional air vents are easy to position.

The 213mm ground clearance means it's easy getting in and out of the model but access to the back row is a little annoying. The footwell lip sits high and catches unsuspecting feet but it's the doors that made my eight-year-old grumble this week because they're heavy to operate.

Storage up front isn't class-leading but you get a glovebox that fits a manual, a dual-opening middle console, two cupholders and drink bottle holders, as well as a sunglasses holder and small cubby in front of the gear-shifter (which is annoying to access).

Storage is much better in the rear with four map pockets, storage bins in each door, two cupholders and two drink bottle holders to choose from.

The boot has 522 litres of capacity available, which is plenty of room for a road trip or a big grocery haul and the level loading space makes it easy to slide things in and out. You get a proper full-size spare tyre, which is rare nowadays and the powered tailgate is always a handy feature.

Technology feels well rounded and the touchscreen multimedia system is responsive and easy to use. However, the portrait position makes the icons and text on the wireless Apple CarPlay look small and I may have made a few accidental calls this week because of it.

The satellite navigation is easy to use and there's also wireless Android Auto. Charging options are decent with each row getting a single USB-A and C port but the front misses out on a wireless charging pad.

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There are usually five variants available for the Subaru Outback but the model on test for this review is a special edition that blends the qualities and features of the top Touring XT but with some exclusive design changes.

Did we need it? Probably not but Subaru has wisely kept the price increase to a minimum, so the AWD Sport Touring XT is $57,490 before on-road costs, just $500 dearer than the usual top grade.

Despite looking more like a station wagon, the Outback sits in the large SUV segment and when it comes to an 'apples to apple' comparison, there's nothing really to compare it to.

With that in mind, the Skoda Superb Sportline wagon costs $74,990 drive-away, and a more traditional SUV like the Volkswagen Tiguan Allspace 162TSI R-Line is priced from $60,590 MSRP.

The standard premium equipment for the Sport Touring XT model includes Nappa leather upholstery, eight-way powered front seats with the driver enjoying additional lumbar and under-thigh support, as well as two-position memory function.

Also included are heating and ventilation functions for the front seats, heat function for the rear outboard seats, a heated steering wheel and sunroof with manual blind.

Technology is well-rounded with an 11.6-inch touchscreen multimedia system with satellite navigation, dual climate control, wireless Apple CarPlay and Android Auto, digital radio, AM/FM radio, two USB-A ports, two USB-C ports, two 12-volt sockets, and a nine-speaker Harman Kardon sound system.

Practical features include dusk-sensing LED headlights, rain-sensing windscreen wipers, keyless entry/ start, a full-size spare tyre and hands-free powered tailgate.

The limited-edition model is well-specified and while it lacks the extra two-seats that its rivals have, it still offers solid value.

This is what lies at the heart of the AMG GLC63’s success or failure. As I mentioned at the beginning, the previous generation’s 4.0-litre twin-turbo V8 has been replaced by an F1-inspired plug-in hybrid powertrain.

But don’t think that means AMG is suddenly focused on efficiency over performance. When AMG says the powertrain is inspired by the brand’s success in Formula 1 racing, what it means is the battery and electric motor provides a significant performance boost to support the internal combustion engine, not just save fuel.

To that end the combination of the turbocharged 2.0-litre four-cylinder petrol engine and the rear-mounted electric motor produces an impressive 500kW and 1020Nm. That’s a massive jump over the 375kW/700Nm made by the outgoing V8.

The Sport Touring XT gets a 2.4L four-cylinder turbo-petrol boxer engine that produces a hefty 183kW of power and 350Nm of torque.

The re-tuned continuously variable transmission (CVT) system feels like it is changing gears but it's smooth and punctual, no matter the speed.

Mercedes makes no secret that the battery is designed for performance, not saving fuel. It only has a 14km EV range but can recharge quickly on the move to provide a power boost when needed.

But despite all that, the GLC63 is actually significantly more fuel efficient than the old V8, using a claimed 7.3L/100km, which is a massive 4.9L/100km improvement over the old model. Although, on our day-long test drive we didn’t manage to come close to that claimed figure and instead saw returns around 11L/100km, albeit after a lot of spirited open-road driving.

Unfortunately, the turbo-petrol engine is thirsty and the official combined fuel cycle figure is 9.0L/100km.

With its 63L fuel tank, you have a theoretical driving range of up to 700km, which is best-case scenario but expect less range if you’re a city dweller.

After doing a mix of open road and city driving this week, my real-world usage came out at 9.3L, which is better than I expected.

Anyone who still believes in the adage ‘there’s no replacement for displacement’ hasn’t driven a modern turbocharged and hybridised engine. The GLC63 is a demonstration of the metaphorical and literal power of modern technology, combining an extremely efficient and potent internal combustion engine with an electric motor to make enormous real-world performance.

To be blunt, the GLC63 feels like a rocketship out of corners, launching with a ferocity and relentlessness the old V8 simply can’t match. It shouldn’t come as a surprise, a mid-size SUV with 1020Nm was always going to have plenty of performance, but even so it’s a shock to the system every time you give the GLC63 full throttle. Officially AMG claims it takes just 3.5 seconds to run 0-100km/h and has an electronically limited top speed of 275km/h - mighty impressive figures for a five-seat mid-size SUV.

To help get all that torque to the road, AMG deploys torque distribution technology that allows for it to be split an even 50/50 front/rear all the way to 100 per cent to the rear tyres.

Other technologies deployed to enhance its handling include AMG Ride Control suspension with adaptive damping and rear-axle steering. There’s also eight AMG Dynamic Select driving modes and four AMG Dynamics settings (Basic, Advanced, Pro and Master), so it’s a complex vehicle that is designed for the enthusiast.

While it’s easy to drive around town, once you get out on the open road you can really get a sense of the GLC63’s performance potential. Beyond just its powertrain the suspension offers good body control and the rear-axle steering helps it feel agile and responsive. 

It’s not perfect though. At times the complexity of the system does lead to some hesitation when you put your foot down. It certainly lacks the linear power delivery of the old V8 and makes for a slightly trickier driving experience at times.

As for the sound, which is one of the biggest elements missing from the V8, Mercedes has added AMG Real Performance Sound, which features a pressure sensor in the exhaust that picks up on the engine note and plays it through the speaker system. It certainly helps make for a louder, more noticeable engine noise, but it still sounds more like an A45 than the previous GLC63 and for many would-be buyers, that’s a major turn-off.

The Sport Touring XT model is nice to drive. The best word to describe the on-road experience is ‘smooth’.

Power delivery is prompt and getting up to speed feels effortless. It's a great open roader but also feels spritely in the city.

The ride comfort is excellent and it’s only when you hit the highway that the wind noise starts to creep up, otherwise, the cabin is quiet and you can chat with back passengers without raising your voice.

The higher ride doesn’t translate to a bumpy suspension and while you’re aware of the road, you’re never bothered by it.

The steering is on the right side of firm for it to feel agile and competent no matter what you’re throwing at it. Visibility is also pretty good but the headrests in the back seat, when up, can hinder your rear-view vision.

The Outback sits at 4870mm long and 1875mm wide, so it fills out a car space but the higher ground clearance means you’re not worried about scraping on ramps and it’s relatively easy to park.

However, it feels cheeky to not have a 360-degree view camera system at this grade level. The reversing camera it comes with is sufficient, but you miss out on front parking sensors.

The Outback has a maximum five-star ANCAP safety rating from testing done in 2021 and features eight airbags which includes a front centre airbag.

It also scored highly across its individual assessment scores with ANCAP. It got 88 per cent for adult protection, 91 per cent for child protection, 84 per cent for vulnerable road users, and 96 per cent for its safety assist systems.

Standard safety equipment includes blind-spot monitoring, tyre pressure monitoring, LED daytime running lights, rear and forward collision warning, rear cross-traffic alert, lane departure alert, lane keeping aid, emergency lane keeping aid, emergency autonomous steering, lead vehicle start alert, traffic sign recognition, adaptive cruise control, reversing camera and front parking sensors.

The driver monitoring system has been improved from previous models and while still sensitive, it no longer chimes at you all the time, which is a welcomed change.

The Outback has two ISOFIX child seat mounts and three top-tether anchor points. The rear seat is wide enough to accommodate three child seats if they're not too large.

The auto emergency braking (AEB) has car, pedestrian, cyclist and back-over detection and is operational from 1.0 to 160km/h but it's usual to see this system operate from 5.0km/h, which is excellent.

The GLC63 is covered by Mercedes Australia’s usual five-year/unlimited kilometres warranty.

As for maintenance, Mercedes offers service plans, spanning three to five years. Three years will cost you $5025, $6455 for four years and five years is priced from $7180. Servicing intervals are 12 months or 20,000km, whichever comes first.

Subaru offers the Sport Touring XT model with a five-year/unlimited kilometre warranty but it’s becoming more common to see longer warranty periods being offered now.

You can pre-purchase a three- or five-year servicing program and the three-year program costs $1406.57 (average of $469).

The five-year option costs $2646.17 (average $529 per service) which is reasonable for the class.

Servicing intervals are good at every 12 months or 15,000km, whichever occurs first.