Mercedes-Benz GLC-Class vs Tesla Model Y

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.

If you like the five-seat Model Y, then you'll like the six-seat L version even more. I think this the best example of Tesla's electric SUV to date, and the cabin layout just makes a lot of sense, and would suit plenty of families who don't need to squeeze someone into a compromised middle seat.

Note: The author, Andrew Chesterton, is a co-owner of Smart As Media, a content agency and media distribution service with a number of automotive brands among its clients. When producing content for CarsGuide, he does so in accordance with the CarsGuide Editorial Guidelines and Code of Ethics, and the views and opinions expressed in this article are solely those of the author.

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.

Spoiler alert - it looks a lot like a five-seat Model Y, doesn’t it, albeit a slightly bigger one. And you’d have to be a bigger Tesla head than me to immediately spot the differences at a glance.

The wheelbase is longer, the rear doors are bigger as are the rear 3/4 panels and the roof line is higher, helping with headroom in the third row.

Still, safe to say if you like the look of the five-seat Model Y, you’ll like this one. And if you hate it, well, good luck.

The alloys are 19-inch and shaded by the aerodynamic caps and there are light bars front and rear which debuted on the updated five-seat Model Y when it arrived mid-last year.

The bigger changes are inside, of course. I promise we’ll get to the second and third rows in the Practicality section, but let’s talk about the look and feel first.

There’s a love/hate relationship with Tesla’s stripped-back aesthetics, and I’m probably somewhere in the middle. I like the airiness of the space in the cabin, and I think it feels nicely put together, and I really dig the contrasting fabric used on the doors and dash which add a little visual interest to the cabin.

But I hate using the central screen to select a gear and I hate not being able to see how fast I’m going without turning my head. A head-up display would work wonders in the Model Y L cabin.

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.

Captain’s chairs are simply a more luxurious version of second-row seating. With that there is no argument and the heated and cooled chairs that occupy the second row of the Model Y L are pretty good examples of them.

Space, both knee and headroom, is ample, and you can adjust each seat individually if you want to grant a bit more space to any third row occupants. Armrests deploy at the push of a button — as do the two hidden cupholders — and it really is easy to settle in and get comfy.

The third row is a bit more hit and miss. I’m 175cm and found I had enough legroom and headroom, but the big plastic mouldings that emerge from each side of the Model Y (which house a cupholder) are a miss. They end up pushing you into the seat next to you, and I can foresee a lot of arm rubbing with anything like two adults back there.

Also confusing is how to actually get out of it. You can fold the seat in front of you flat, but then you have to climb over it. I found it easier to just walk out between the seats.

There are another two USB-C ports in the rear row and you get air vents but no temperature controls. 

The Model Y L stretches 4969mm in length, 1668mm in height and 2129mm in width, which is roughly 18cm longer and 4.5cm taller than the five-seat model. The extra space doesn’t sound like that much, but start dropping rows and you find a heap of storage space.

Both the second and third row stow electronically from the boot, but with them in place you’ll find 420 litres of storage in the double-layer boot. Drop the third row, and that number grows to 1076 litres. With the third row folded there is a massive 2423 litres of space. The frunk serves up another 116 litres.

There’s also room (and the ISOFIX attachment points) for four child seats.

The Model Y L sits smack bang between the $68,900 Long Range AWD and the $89,400 Performance, setting you back $74,900, before your on-road costs. It’s also the only three-row option in the Tesla family.

Aside from people movers, we’re not swimming with options in the three-row electric space, either. The Kia EV9 will get it done from $97,000, the Hyundai IONIQ 9 starts from around $120K and the Volvo EX90 is more expensive again (from $124,990).

Anyway, in Tesla land, the Model Y L rides on 19-inch alloy wheels, has a glass roof, automatic wipers and Tesla’s smartphone access key, as well as the little credit-card swipe.

Inside, there’s a 16.0-inch central screen that handles everything. And I mean everything. It's your gear selector, your speedometer, and everything else, too. There’s no Apple CarPlay or Android Auto, but you can access things like Spotify and podcasts through the in-built apps and the on-board navigation system is a good one, too.

All of that pairs with a 19-speaker sound system, and there are dual wireless charge pads. All three rows of seats are heated, while the first and second row get ventilation, too.

A second 8.0-inch touchscreen in the middle row then handles things like the seat heating or cooling, music and games to amuse the kids. And the Model Y L also debuts V2L, or Vehicle to Load, for Tesla in Australia, using a connector in the external charger.

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 Model Y L gets Tesla’s dual-motor AWD powertrain, with two electric motors producing a total 378kW and 590Nm. That’s enough, Tesla says, to knock off the sprint to 100km/h in five seconds flat.

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.

Tesla is always a little vague when it comes to the size of its batteries, but reports point to the Model Y L carrying a 84Wh (useable) NMC battery.

Whatever the specifics, the range is strong, with Tesla promising a 681km driving range on the WLTP combined (urban/extra-urban) cycle.

It’s also set up for 250kW DC fast charging, which should see you take on 288km in 15 minutes, according to Tesla.

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.

Honestly, it feels like the Tesla Model Y has grown up. I didn’t love earlier iterations of this car and I found the Performance to be fast but lacking any emotional fizz.

This one, though, feels solid and composed, and the power on tap (of which there is ample) is more about effortless progress than it is attempting to offer sports car excitement.

The steering is now nicely weighted and feels direct enough without being too sharp, and the cabin is well insulated, with often the slightly off-putting sort of rubbing noise the steering wheel makes when you turn it the only intrusive sound.

One drawback is a ride that definitely errs on the side of firm. This Model Y L gets electronic damping designed to iron out some of the more jagged stuff, but it still feels brittle in places, and you can definitely feel some sharpness in the cabin. Now, to be fair, it’s not too firm for me, but it might be for you.

Another is a bizarre turning circle which constantly reminds you you’re driving a big bus, especially when you try to complete a tight three-point turn.

But despite its stretched dimensions, I found the Model Y L easy to drive and park in the city, and once you're up to speed with Tesla's operating system (there's no Apple CarPlay or Android Auto), then the screen is pretty easy to use, too.

The Model Y L gets the same maximum five-star ACNAP safety rating as the rest of the Model Y range, with nine airbags (up from seven in the five-seat model), and things like AEB (Auto Emergency Braking), lane-keeping assist, 'Forward Collision Warning' and blind-spot monitoring all along for the ride.

Interestingly, the curtain airbags from the five-seat version haven't been replaced, with coverage still only extending to the second row. New airbags have instead been added for third-row occupants.

One more analogue quirk of the Tesla Model Y L is the thick B-pillar, which does a good job of almost completely obscuring driver-side blind-spot checks (for those of us who still like to do those manually).

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.

Tesla warranty is a these-days-underwhelming five years and unlimited kilometres, while the high-voltage battery is covered for eight years or (a wildly specific) 192,000km.

There’s also five years' of roadside assistance, including puncture repair (a good thing, given the lack of a spare wheel). I also couldn’t find a puncture repair kit and later research suggests Tesla sells them, rather than provides them as standard.

Tesla servicing is condition-based, so there’s no fixed schedule, with a summary on the car’s touchscreen providing a record of when vehicle maintenance was last carried out and prompts for when they should be performed next.

In the absence of a combustion powertrain the emphasis is on things like wheel rotation, balancing and alignment, brake fluid testing, air-con servicing, camera precision, radiator cleaning and high-voltage battery maintenance.

Expecty a ‘Vehicle Health Check’ to come in under $300 with ‘General Diagnosis’ at around $270 per hour.