Mercedes-Benz GLC300 vs Holden Calais

What's the difference?

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.

A best-of-both-worlds option that should have us questioning our SUV obsession, the Calais Tourer delivers plenty of practicality perks and a higher ride height in a dynamic and car-like package. The equipment levels are spot on, including the comprehensive safety package, and it you act smartly, you'll get a hugely long warranty to boot.  

It sure is thirsty, though, and we can't help but think plenty of owners would be happier with a smaller, more-efficient engine. 

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.

Less an SUV (happily), and more a high-riding wagon, the Calais Tourer borrows a little from the Subaru XV in its exterior design, sporting the same plastic cladding over each wheel arch. Clearly there is a whole heap of shared DNA between the Sportwagon and Tourer, and so it offers similar perks; like its SUV-shaming boot space. 

Elsewhere, the Tourer shares the same soft and rounded edges as the rest of the Commodore range, and while it is genuinely quite handsome from most angles, it is at its best viewed front on, where a simple front-end is bookmarked at each corner by a narrow headlight on top, and an encased fog light below. It’s all a touch understated, sure, but it looks sharp in the metal.

Inside, it’s a clean and functional cabin design, with most of the touchscreen functions controlled by a simple row of four horizontal buttons, and with a gloss-black surround encasing the centre console. The thin leather wheel feels lovely under the touch, and the contrasting door trims and soft-touch materials find their way into the backseat, too. 

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.

The Tourer serves up identical storage space to its Sportwagon near-enough twin, with 793 litres of storage (to the roof line) with the rear seats in place, and 1665 litres with the rear seat folded down. That’s about 200 litres more than the regular Commodore hatchback.

Where the Tourer does differ from the Sportwagon is in its exterior dimensions, measuring 5004mm in length (versus 4986mm in the Sportwagon) and 1525mm in height (versus 1483mm). Width and wheelbase are identical, though (1871mm and 2829mm), and so the interior space dimensions - like headroom and legroom - are identical no matter which of the estate-style Commodores you opt for. 

The key dimension here, though, is ride height, with the Tourer offering 20mm more ground clearance (42mm greater height overall) than the Sportwagon. That, combined with the on-demand all-wheel-drive system, allows for some light off-roading - though you won’t be conquering Everest.

Up front, expect two cupholders hidden under a gloss-black cover, as well as power and USB connections located in a central cubby. The back seat is home to two extra cupholders hidden in a pulldown divider, and there is room in each of the doors for bottles. The back seat is also home to air vents (but no temperature controls) and two USB charge points located just below the vents.

The Calais has long formed the most luxurious rung of the Commodore ladder, and the wagon-ish Tourer is without doubt the most practical version. It will set you back $45,990 ($47,990 drive-away) in the guise we’ve tested here, and $53,990 In Calais V specification.

Not to be sneezed at, then. But it does arrive with plenty of stuff to help justify your investment.

Outside, you’ll find 18-inch alloys, a handsfree auto-opening boot, heated mirrors, keyless entry with push-button start, a remote start function, rain-sensing wipers and automatic headlights with LED DRLs. Inside, expect leather seats that are heated in the front, a leather-wrapped wheel, dual-zone climate control, standard satellite navigation and a wireless charging pad for compatible phones.

On the technology front, an 8.0-inch touchscreen pairs with an eight-speaker stereo, and it’s both Apple CarPlay and Android Auto equipped. There’s also a genuinely impressive standard safety package, too, but we’ll drill down on that under the Safety sub-heading.

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.

A really rather good 3.6-litre V6 engine Is parked under the bonnet, feeding 235kW at 6800rpm and 381Nm at 5200rpm to all four wheels as required, thanks to an on-demand all-wheel-drive system. The suspension is tuned specifically for its high-riding antics, too.

The grunt is fed through a nine-speed automatic, and while Holden doesn’t quote a specific zero-to-100km/h time, it’s no slouch from the lights. 

The 3.6-litre engine means a braked towing capacity of 2100kg, and an unbraked max of 750kg.

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.

Not so good, I’m afraid. The offical number is on the high-side at 9.1 litres per 100 kilometres on the claimed/combined cycle (though that's less than the equivalent Subaru Outback), but we were averaging a smidge under 14.0L/100km after what was admittedly quite a lot of city driving. Still, that’s high.

Emissions are pegged at 212g/km or C02, and the Tourer’s 61-litre tank will accept cheaper 91RON fuel, or an E10 blend.

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. 

Really very good. That 3.6-litre engine (why they haven’t offered the Tourer with the smaller and smarter turbo engine is something of a mystery) might be a touch old-school and a touch thirsty, but it’s a rich and powerful thing, and it gives the Calais-stamped Tourer a perky personality that defies its dimensions.

The Calais Tourer was built in Germany, and fitted with an engine and transmission from the USA, before undergoing local tuning here in Australia (think bespoke steering and suspension tunes calibrated both at the company’s testing facility and after a 200,000km test on Aussie roads), and it’s the last of those Dr Frankenstein ingredients that have had the biggest impact here. 

The Tourer’s ride is fantastic, perfectly poised between firm composure and everyday comfort, and - like most good wagons - it will honestly leave you wondering why so many people are clamouring aboard the SUV train when you can all the space with better dynamics in a humble estate. 

The nine-speed ‘box is smooth and sharp in its operation, too. But the fuel use is a concern. Sure, we spent the bulk of our time in the city, where stop-start traffic naturally uses more fuel. But then, surely so would most owners? 

You’ve got to hand it to the Lion for the standard safety package here, which includes the Holden Eye camera system as standard, adding auto emergency braking (AEB), lane keep assist, lane departure warning and forward collision warning. You’ll also find semi-autonomous parking, a reversing camera and rear parking sensors.

The Calais Tourer adds blind-sport monitoring and rear cross-traffic alert to that pretty comprehensive package. All of which helps the Commodore range qualify for the maximum five-star ANCAP safety rating.

Finally, you can add six airbags and two ISOFIX attachment points to the mix.

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.

Holden has recently relinquished the initial warranty offering, now including the Commodore in its seven-year, unlimited-kilometre warranty program, meaning it mixes with the very best in the aftercare business. For now, at least; normally, the Commodore carries the brand's standard three year/100,000km warranty. But be on the lookout for the return of this deal if you miss out this time.

Service intervals are pegged at 12 months or 12,000kms, and the Commodore falls under Holden’s extensive capped-price servicing program, and it will cost between $259 and $359 for each of the first seven annual services.