Polestar 3 vs Mercedes-Benz GLC300

What's the difference?

With the kind of driving range, dynamics and comfort that could convince even the EV doubtful to give it a crack, the Polestar 3 – and specifically this Long Range Single Motor – feels like it was worth waiting for.

The GLC300 Coupe isn't quite as great when it comes to being a family car as the regular SUV version of the GLC, and that's purely down to the sloping roofline which not only makes access more difficult to the second row but reduces boot capacity.

That said, the GLC300 Coupe makes a much better family car than a Mercedes-Benz C-Class sedan, or any sedan.

Easy and enjoyable to drive, packed with great features and still practical, the GLC300 Coupe would still cut it as a good family car.

I think the Polestar 3 looks great – big, but not looming, and still somehow svelte enough to look sporty.

The brand takes a unique approach to marrying design and aerodynamics, with a lip at the edge of the bonnet that allows for airflow. But it doesn't look like a purely functional element.

Instead it accentuates what Volvo would call the 'Thor's Hammer' (but I think Polestar calls them 'Twin Blade') headlights, which are mirrored below with black venting.

In fact, looking at the 3 front-on is a bit like looking into a reflection in a crystal-clear lake, with the lighting signature perfectly reflected in the lower half of the front end.

If it sounds like I'm waxing lyrical, it's because I am. I think the Polestar 3 is among the best looking vehicles in its segment and one of the better looking SUVs, period.

Inside, though, it's a study in minimalism, which while very neat and tidy, makes it feel a little less luxe than you might expect from a vehicle at this price point. In fact, at a quick glance, it doesn't look that far removed from the relatively cheap-as-chips MG4's cabin.

The materials are thoughtful and lovely, though. Leather-like materials are used sparingly, replaced by what Polestar calls "Bio-Attributed MicroTech Charcoal with Repurposed Aluminium Deco". A far easier way to describe it, though, would be as reminiscent of a wetsuit.

Elsewhere, it's a fairly pared-back affair, with just the huge portrait-style central screen and the landscape driver screen grabbing your attention. Dig deeper, and there are some really nice, gentle details, like the ambient interior lighting that illuminates a little strip along the door panel, including the Bowers & Wilkins logo. A similar line of light spans the entire dash, too.

And I love the metallic-look panel along the dash which, one can only assume, is the 'Repurposed Aluminium Deco'.

Coupe SUVs aren’t for everybody… they’re not even for lots of people. But the design of an SUV with its roof cut down so that it meets the tailgate at an almost sportscar-like angle appeals to more than a few fans. The thing is they don’t just like the look, they love it, and they also probably enjoy how much the styling makes other people cranky.

To my eyes the GLC300 Coupe is the best execution of the bodystyle compared to those of BMW and Audi. There’s an elegance to the GLC300 Coupe and the AMG-line adds a tough look that only enhances the solid, powerful but pretty look.

The GLC Coupe is a mid-sized SUV and this new generation model is a bit bigger the previous one and now measures 31mm longer at 4763mm end to end, it’s 1890mm wide, 1605mm tall and has a wheelbase of 2888mm.

It’s also more aerodynamic than ever. No seriously, it’s drag coefficient is now 0.27 and it looks like a bar of soap - and it's about as slippery as one, too.

More curved surfaces await inside with a dashboard that pours down into the large centre console and it's adorned with a sloping and large portrait-style media screen. 

At night or in tunnels the ambient lighting glows through the air vents and skirts the edges of the door trims, console and dashboard.

It’s a minimalist and high-tech cockpit with modern sports seats up front and a Nappa leather wrapped steering wheel with its twin blade design.  

So, how does the coupe design work for family practicality? Let’s take a look.

Polestar has done a solid job of disguising the dimensions of the Polestar 3, because while it looks sleek and sporty it's still a big boat, stretching a sizeable 4900mm in length, 1968mm in width and 1618mm in height.

That size is most noticeable in the back seat, which is properly cavernous, helped further by a fully flat floor which lends even more airiness. Sitting behind my own 175cm driving position there's plenty of headroom and tons of knee room, giving the Polestar 3 official adult-friendly status.

The ISOFIX attachment points are located beneath two pop-off plastic covers, which makes fitting a child-seat base super easy. This is something I wouldn't have cared about at all exactly 22 weeks ago, but now I care a lot, and this was among the fastest and easiest systems I've used.

Happily, there is no major back seat compromise, either. The pews are comfortable and supportive, with the window seats separated by a pull-down divider home to two pop-out cupholders.

There are twin USB ports for rear-seat riders, too, as well as air vents with temperature controls, and – thanks to that Plus Pack – rear seat heating.

There's storage aplenty, too, with a total 597 litres in the boot with the rear seats in place, and 1411 litres with them folded flat, including a handy 90-litre hidden storage spot under the boot floor. Up front, there's a soft-bag-ready 32-litre frunk.

SUVs are the most practical cars for families because of the better access to the cabin thanks to their large doors and slightly elevated ride height, their big boots with wide and tall hatch openings and their high flat rooflines. They’re essentially raised station wagons.

A coupe-style SUV still has four doors but they are less boxy due to the sloping roofline which falls away quickly to meet the tailgate at a lower point. The effect is a sporty-looking shape but practicality is lost in this exercise of form over function.

The second row doorways aren’t as large as those on the regular SUV. I did a side-by-side test and felt like I had to duck under the sloping roof when getting out of the back seat.

The smaller opening also made it trickier to lift my toddler daughter into her baby seat.

The sidesteps are also surprisingly handy for bigger kids and my eight-year-old used them every time when climbing into the car.

Cabin storage is outstanding with huge door pockets and cupholders in both rows, and while the 545-litre boot in the GLC300 Coupe is 80 litres smaller than the cargo capacity of the regular GLC SUV, it's bigger than the previous version of the Coupe.

As for people space, there’s enough headroom for me at 189cm tall in the back seat and heaps of legroom, even behind my driving position.

I’ve mentioned the lack of climate control in the second row, but also should point out that there are no USB ports back there either.

There are USB ports in the big centre console box upfront and a long cord should be able to make it to the second row. 

There’s a wireless phone charger but it's housed in the bowels of the centre console too, and you’ll need to weave your hand while clasping the phone under the shiny black trapdoor, past the cupholders possibly with drinks in them and almost under the dashboard.

Mercedes-Benz is offering Australia just the GLC300 grade in both the SUV and Coupe body styles.

High-performance AMG variants are out overseas now and will arrive in Australia soon, too.

You can expect to pay more for these AMG beasts - a lot more than the $113,900 list price of the GLC300 Coupe.

Still the GLC300 Coupe does come standard with an AMG Line body kit and 20-inch AMG alloy wheels. LED headlights are also standard, so is the panoramic glass roof, tinted rear glass, proximity unlocking and a power tailgate.

Inside there’s synthetic leather Artico upholstery, sports heated front seats, Nappa leather steering wheel, an 11.9-inch media display with Apple CarPlay and Android Auto, a 12.3-inch digital instrument cluster and a head-up display. There’s also dual-zone climate control and wireless phone charging.

The value is good in terms of features, although the price is slightly higher compared to the rivals such as the BMW X4 xDrive30i ($106,400) and Audi Q5 Sportback 55TFSI ($110,200).

It’s worth pointing out, too, that the GLC300 Coupe is about $10K more than the GLC300 SUV version. Why? The coupe versions of prestige SUVs always tend to be pricier than their regular more boxy SUV siblings. Somebody in marketing will be able to explain why.

Having lived with the GLC300 Coupe with my family over the past few days I can say the proximity unlocking which works by touching even the back door handles is excellent, the tinted windows are dark and cut out much of the sun's glare, but there’s no climate control in the second row. There are air vents back there, which is good.

I found that on hot days the semi-transparent shade on the glass roof couldn’t stop the cabin from heating up quickly.

The  Long Range Single Motor tag hints at what's powering this Polestar 3, with a single, rear-axle mounted (so, rear-wheel drive) motor producing 220kW/490Nm and a fairly sedate sprint from zero to 100km/h of 7.8 seconds.

The GLC300 Coupe has a 2.0-litre four-cylinder turbo-petrol engine making 190kW of power and 400Nm of torque.

There’s also an overboost function which allows the engine to make an extra 17kW and 200Nm just for a brief moment, but that extra dollop of grunt combined with the regular output provides impressive acceleration (0-100km/h in about 6.3 seconds) for overtaking or moving quickly when you need to.

A smooth nine-speed automatic transmission sends the drive to all-four wheels.

The GLC300 Coupe is all-wheel drive and while there’s a setting for rougher terrain, along with one for comfort, eco and sport, but I’d make sure that it doesn’t get any more adventurous than tame gravel and dirt roads.

Mercedes-Benz refers to the GLC300 Coupe as a mild hybrid and this is because it has a 48-volt system and an integrated starter-generator.

This type of hybrid doesn’t use electric motors, doesn’t drive the wheels and won’t save much fuel, but it will provide efficiencies by supporting the engine and when coasting, plus will reduce petrol consumption to a small degree.

How far is far enough before you'd consider an EV? Because I've got to say, if I owned the Polestar 3, I'd probably have to plug it in once a week, if that.

A sizeable 111kWh lithium-ion battery provides the charge here, and unlocks a claimed WLTP driving range of 706km. Now, it's worth pointing out these numbers are rarely realistic. For example, WLTP testing is conducted with the climate control switched off, but a real-world result of 600km or more, depending on how you drive, is still a large number.

The battery is the same as in the dual-motor variant, but this RWD car is lighter and less powerful, and it has a lower top speed (180km/h), reducing its energy usage to 17.6kWh-20.3kWh/100km (from 19.6-21.8kWh/100km).

The Polestar 3 has a 400V architecture, meaning hyper-fast charging speeds are out of the question. Instead, it's capped at a maximum 250kW (still more than most public chargers in Australia can produce) which means a 10-80 per cent charge in 30 minutes.

At home, an 11kW charger will take more like 11 hours, or an estimated 16 hours using a regular 7.0kW wallbox.

According to Canstar Blue, the average price per kW for residential power in NSW at the moment is about $0.34. So, using my admittedly questionable maths skills, it would cost around $37 to take your Polestar 3 from empty to full at home.

As we mentioned above the GLC300 Coupe's 48-volt mild hybrid system is not the kind of hybrid that will allow you to drive miles on electric power, nor will it dramatically reduce fuel consumption in the way a parallel, series or plug-in hybrid will. But every bit of efficiency helps.

Mercedes-Benz says the GLC300 Coupe will use 7.7L/100km after a combination of open and urban roads. 

We had the GLC300 Coupe for just two days, but in that time my family covered 176km of regular daily usage which took in motorways but mainly suburban duties such as the school run, supermarket dashes, that sort of thing.

In our fuel test we measured 14.48 litres at the fuel pump which works out to be an on-test fuel use figure of 8.2L/100km and not far off the manufacturer’s claim. 

While this fuel consumption isn’t overly high, a plug-in hybrid or even a parallel or series hybrid could return about 5.0L/100km or less.

Mercedes-Benz has dropped plug-in hybrids from its Australian range which is a shame because it would be good to see more efficient options in the GLC range. Of course if you want more efficiency from a Benz of the same size, there is always the fully electric EQB or EQC.

The Polestar 3 is that rarest of beasts – a big and sumptuous SUV that's genuinely engaging to drive.

This is going to sound odd given we're talking about 2.5-tonnes of Swedish metal but I reckon the fact it's not lightning-fast makes it more fun to drive. It somehow (and yes, this is a crazy thing to say) gives off Mazda MX-5 vibes, in the sense that, while some EVs feel utterly scientific in the way they accumulate speed, this rear-drive Polestar feels fun, perky and like you're actually driving it.

Don't get me wrong, there's more than enough power on offer here to get the 3 up and moving, especially the way it accelerates from low to mid speeds, but it's more than powerful enough to feel like you can push it a little bit harder without risking a visit to the undertaker.

The ride is good, too, leaning into its sporty nature without vibrating your eyeballs through suspensions stiffness, and the steering is direct and predictable. Speaking of which, you can dial up the sportiness of the accelerator (responsiveness) and steering (weight), too.

I also like the three-stage brake regeneration (off, medium and full 'one-pedal' driving) accessed through a permanent button at the base of the screen, and I prefer that it isn't as brutal as it can be in other vehicles. The cabin is also impressively quiet, though how much of that is owing to the Plus Pack's upgraded stereo arriving with active noise cancellation is a mystery.

There is no shortage of weight on board, though, and get too aggressive with the steering wheel and you'll get that disconcerting top-heavy tipping feeling so common with big SUVs.

I'm not convinced by the Polestar 3's software, either, with a couple of weird warnings popping up during my time with the car. The first warned that the driver assistance systems had failed, and told me to book a service, and the second even weirder issue is it liked to warn me there was "no valid key detected" despite it being in the centre console, and that "restart would not be possible".

Neither warning seemed accurate, to be fair, as the safety one went away on its own after a while and I had no problem starting the car.

There’s a lot to like here but the short version is the GLC300 Coupe has a comfortable ride, but good handling, with a responsive engine, although rear visibility through the small back window is poor.

If we drill down a bit further I can tell you that excellent cameras around the car will help you check to make sure kids aren’t running around behind you and that forward and side visibility through the window is good.

An important takeaway is that the GLC300 Coupe is easy to drive with light steering and an engine that’s mild and controlled in its power delivery.

The gear shifter is mounted on the steering column, in the same way an indicator lever is. So putting the car into Drive, Reverse and Park is so easy and means you don’t have to take your hands off the steering wheel. 

As a family car I liked the good body control and composed ride. We have a small toddler that we can sometimes only get to sleep by taking her for a drive and we found that she could nod off and not be woken by potholes and speed bumps or too much leaning in the corners. 

The GLC was given the maximum five star ANCAP rating in 2022. There’s AEB, active lane keeping assistance and active blind spot warning and nine airbags including a centre airbag.

As mentioned above I especially liked the surround-view camera systems - which let you look right around the car - good for driveway safety and kids.

For child seats you’ll find two ISOFIX mounts and three top tether anchor points in the second row.

I was also impressed to see a space-saver spare wheel under the boot floor and not just a puncture repair kit. 

Another tick for the Polestar here. While I advocate for longer warranties (kudos to brands like Nissan, MG and Mitsubishi), the 3's five-year, unlimited-kilometre warranty and eight-year, 160,000km battery warranty is on par with its premium competitors.

The first five years or 100,000km of servicing is on the house, too (it's required every two years or 30,000km after that) and five years' roadside assistance is thrown in, as well.

The GLC300 is covered by Mercedes-Benz's five-year, unlimited-kilometre warranty. 

Services are annually or every 25,000km. And you can buy a three-year service plan for about $3000.