Mercedes-Benz GLC-Class vs Subaru Forester

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 MY26 Subaru Forester packs plenty of punch in terms of standard features, a roomy and functional interior and overall driveability. Sure, it’s not the most exciting vehicle to drive on- or off-road but to get stuck on that is to miss the point entirely. This is a decent all-rounder with a solid background and an AWD system that long ago set the gold standard for vehicles of this type.

In a tough mid-size SUV market segment aimed more at those intent on driving through car parks rather than adventuring through national parks, the Forester offers greater versatility than most and should not be ignored.

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.

This Forester is 4655mm long (with a 2670mm wheelbase), 1830mm wide and 1730mm high.

The new generation retains more than enough of the previous Forester – blocky profile included – to remain clearly recognisable.

Traditionalists may chafe at the slicker, more citified appearance of this Forester over previous generations but the overall package is inoffensive enough to not elicit any howls of outrage from passers-by on the street.

The Forester’s interior maintains a similar cabin look and feel as before but with a 11.6-inch portrait-oriented multimedia touchscreen dominating up front, a mix of physical and on-screen buttons, as well as soft-touch surfaces and durable plastics.

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 Forester is quite roomy for a mid-size SUV and this is the top-spec variant so there’s leather everywhere.

The interior layout is neat and tidy and lands firmly on the correct side of being practical and familiar, with all controls easy to locate and operate.

The touchscreen offers mostly simple intuitive functionality with infrequent need to cycle through numerous menus and sub-menus to access what you want.

The aforementioned mix of physical and on-screen buttons, as well as soft-touch surfaces and durable plastic are welcome here because, you know... real life.

The front seats offer ample support and the driver is able to dial-in their preferred position via power controls on the eight-way power-adjustable seat (with dual memory). The front passenger has an eight-way power-adjustable seat. Both seats are heated and ventilated.

The 60/40 split folding second-row seats aren’t too shabby either, in terms of comfort and amenities, with a fold-down arm-rest with cupholders and directional air vents etc.

Cargo volume is 496 litres (with rear seat in use) and 1174 litres (with the rear seat down, 1667 litres to ceiling.

The tailgate is powered and hands-free with a kick sensor (apparently). But I never tried that, instead opting for the tailgate-mounted button to open and close it.

The Forester AWD Touring (petrol) is priced at $50,990 MLP while its hybrid sibling is $55,990.

Standard features include an 11.6-inch multimedia touchscreen (with wireless Android Auto and Apple CarPlay), 18-inch alloy wheels, auto LED headlights, dual-zone climate, heated front seats and electric folding rear seats as well as a wireless phone charger.

Top-grade additions include a sunroof, low-profile roof rails, a digital driver display, leather-accented seats, a leather auto-shifter, ventilated front seats and a 10-speaker Harman Kardon audio system.

It also has power-adjustable front seats, sat-nav, auto-dipping and folding door mirrors and a hands-free tailgate.

Exterior paint choices include 'Crystal White Pearl', 'Ice Silver Metallic', 'Magnetite Grey Metallic', 'Crystal Black Silica', 'Crimson Red Pearl', 'Brilliant Bronze Metallic', 'Daybreak Blue Pearl', 'Sapphire Blue Pearl', 'Cashmere Gold Opal', 'Autumn Green Metallic' and 'River Rock Pearl'.

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 Forester has the line-up’s 2.5-litre four-cylinder naturally aspirated boxer engine (producing 136kW at 5800rpm and 247Nm at 3700rpm) matched to a constantly variable transmission (CVT), which some people detest, and some people couldn’t give a rat’s whether it’s there or not.

Also onboard is Subaru’s all-wheel drive system, driving modes (including 'Normal', 'Deep snow/Mud', and 'Snow/Dirt') and 'X-Mode' “that constantly monitors the traction available to each wheel and centralises the control of key components including the engine, transmission, drivetrain and brakes to help manage slippery conditions”, according to Subaru.

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.

Official fuel consumption on the combined (urban/extra-urban) cycle for the Forester is 7.9L/100km and it uses 91RON 'standard' unleaded petrol at a minimum.

On this test, I recorded 8.1L/100km. But fuel consumption was as low as a dash-indicated 1.7L/100km while driving the Forester with adaptive cruise control engaged.

The Forester has a 63-litre fuel tank, so, going by our on-test fuel-use figures you could reasonably expect a driving range of almost 780km from a full tank. However, as with any vehicle, once you’ve loaded the Forester with any real-world burdens (e.g kids, dogs, camping gear, etc) you’ll soon see the fuel consumption increase.

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 Forester feels comfortable and composed on sealed surfaces and offers some degree of dynamism to the driving experience – so in line with previous generations.

It feels more refined, sharper to steer and more responsive than before. There’s ample visibility to the front but a substantial B pillar obscures the driver’s vision back over their right shoulder.

The Boxer engine and CVT work well together, power and torque outputs are more than adequate in this package, and that much-maligned transmission is not intrusive if the Forester is driven with care and common sense.

However, acceleration from a full stop is sluggish.

The suspension set-up – MacPherson struts up front and double wishbones at the rear – yields a firm but not jarring sense of ride and handling.

The 1662kg Forester proved nimble to manoeuvre around the Big Smoke, the suburbs and in the bush (more about that soon) with a neat 10.8m turning circle.

All-wheel drive vehicles are capable of tackling off-road adventures in their own right but, for safety’s sake, AWD drivers should avoid anything beyond well-maintained dirt tracks in dry weather. AWD cars are designed for use on bitumen roads with some dirt or light-duty off-road use.

And so it was with our test of this Forester. On-test off-road terrain equalled firm-packed sand and gravel/dirt bush tracks in dry weather, although we did drive through one shin-deep mudhole with no trouble.

The Forester has a listed 220mm of ground clearance, the suspension held up well over a brief stint on mild corrugations and Subaru AWD proved more than up to the task when things became a little trickier, providing improved grip and traction in slippery conditions that demanded to be driven at very low speeds.

If push comes to shove, it’s capable of more than light off-roading, but the Forester’s ground clearance and off-road angles ultimately limit its off-road capabilities.

The Forester’s 'all season' tyres – Falken Ziex Z001A A/S (225/55 R18 98V) – are fine for light to moderate off-roading but anything more difficult than that and you’ll need to get a set of more aggressive all-terrain tyres. It does have a full-sized spare onboard.

It has maximum towing capacities of 750kg (unbraked trailer), 1800kg (braked) and a maximum towball download of 180kg. GVM is 2223kg; GCM is 4023kg.

Some niggles: The driver awareness system is annoyingly over-reactive.

The Forester has the maximum five-star ANCAP safety rating from testing in 2024.

It has nine airbags (dual front, dual front side, dual curtain, driver’s knee, far side and front passenger seat cushion), adaptive cruise control, emergency lane-keep and centring (with departure warnings), pre-collision braking, auto emergency steering, a 360-degree view monitor system, and a driver monitoring system which includes a ‘safe stop’ feature that – if the vehicle detects that the driver is non-responsive – will bring the vehicle to a gradual, you guessed it, safe stop.

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.

The MY26 Subaru range is covered by a five-year/unlimited kilometre warranty, five-year/75,000km capped price servicing, and 12 months roadside assistance.

A service is required every 12 months or 15,000km, whichever occurs soonest. After your free “1 Month Health Check and Chat”, cost per service is $347.95 (at the 15,000km/12 month mark), $520.45 (30,000km or 24 months), $393.10 (45,000km or 36 months), $679.30 (60,000km or 48 months) and $358.20 (75,000km or 60 months). Average over the five years is $459.80.

Subaru Australia has more than 140 dealerships across the country with a decent spread over metro and regional areas. Foresters may be serviced at those dealers or by approved mechanics.