BMW 850I vs Mercedes-Benz GLC300

What's the difference?

Does the world really need a car as outrageously loud, over-the-top, exclusive and stupidly fast as BMW’s new 8 Series? Obviously not, but BMW clearly felt that its range, and its customers, could do with something like this. On paper, and even from the kerb, it seems a strange beast - luxurious and yet lightning quick - but from the driver’s seat it just instantly makes sense. And makes you smile. Scarily, there’s an even faster 8 Series Competition version to come…

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.

In terms of improving on the car it’s replacing, the new 8 Series pretty much smacks it out of the park. Time has not been kind to vehicles fitted with pop-up headlights and the previous 8 Series, which roamed the planet in limited numbers from 1989 to 1999, with now-unimaginable V12 engines, seems a strange-looking beast, with its tiny little kidney grille almost hiding beneath a BMW badge.

The new M850i is a simply stunning looking beast, particularly in Coupe form (the Convertible is not ugly, but it just doesn’t look as complete). Extremely wide and menacingly low, it seems to loom over whatever patch of ground its parked on, giving off an air of magnificent malevolence.

It looks fantastic when followed from behind, but it’s the front view - featuring the thinnest headlight design ever seen on a BMW for a sleek, Iron Man-like face - that really grabs your attention.

Proportion, poise and big old 20-inch wheels give it plenty of presence, while the way the glasshouse tucks in at the rear only magnifies its powerful hips.

BMW has also thrown plenty of design flair at the interior, where you’ll find the unusual yet fabulous-feeling glass gear lever (there’s more of this sparkly, cut-crystal-like stuff on the volume knob, Start button and iDrive controller).

Not only does it feel truly unique and expensive in your hand, but it has an 8 buried beneath it, which shifts and shimmers as you try and see it through the many angles of the glass.

Elsewhere, the cabin is swathed in merino leather and feels undeniably classy, with a touch of modernity via its big screen, but it’s still not quite as beautiful as the cockpit you’d find in an Audi of a similar price. Close, but not quite.

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.

At the very least, you’d have to say the 8 Series is fit for purpose. The seats are hugely comfortable for long journeys, so that’s practical, there’s a handy tray for your phone, where it will be wirelessly charged, and there are two cupholders in front of that, and storage for bottles in the doors.

No human larger than primary school age will ever sit in the back, so there’s not a lot going on back there.

In terms of boot space, it’s reasonably capacious at 420 litres, or 350 litres for the Convertible.

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.

Truly, there is one impressive engine sitting under that big, hulking bonnet. The M-fettled 4.4-litre V8 has two turbochargers located inside the V of the block for “immediacy of response”, and they certainly deliver that.

Peak power of 390kW is delivered between 5500rpm and 6000rpm while its hefty 750Nm of torque is on song, for effortless overtaking, from 1800rpm all the way to 4600rpm.

Looking at those rev figures it’s clear to see that you are initially launched by a huge wave of torque and then, while you’re still drawing breath, the power really kicks in. 

All that grunt equates to 0 to 100km/h in just 3.7 seconds, which is very fast indeed, and you also get to enjoy a growly, guttural soundtrack, thanks to the standard Sport Exhaust.

The Convertible has the same engine with the same figures, but it’s slightly heavier and thus takes 3.9 seconds to hit the tonne. Which is still stupidly fast for this much car.

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.

Good luck ever matching these figures, with all that V8 temptation beneath your right foot, but the claimed number, at least, is 10.4 litres per 100km for the Coupe and 10.6 for the Convertible. During our launch drive we would have been absolutely nowhere near those figures.

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.

There is a sizeable distance between driving a small, lithe sports car that can sprint from 0 to 100km/h in a scorching 3.7 seconds, and then piloting something that feels as large, and louche, as a cruise ship that can do the same thing.

Accelerating in the M850i is an experience that can only be described as hilarious. There’s just so much mass attempting to move so quickly that it defies belief. The way the nose rears into the air, and the rear end seems to dip towards the ground, brings to mind a bucking bronco, although a feisty polo pony would probably be more appropriate.

It’s easy to see why this car is all-wheel drive rather than the traditional BMW rear-driven layout, because there’s just no way you could get all that grunt to the ground with two wheels, or not without some serious power oversteer issues.

For a car that weighs more than 1.8 tonnes, the 8 Series is surprisingly fluid and involving on winding stretches of road. It feels hunkered down and hammered into the road, which is less of a surprise, but the steering is so perfectly weighted and the power delivery so well calibrated that it really encourages you to push on, and rewards you sense of adventure with smile-widening pace.

It’s quite something to suggest of a car that costs a quarter of a million dollars, but the M850i actually exceeds your expectations in terms of driving joy. On paper, it looks like a straight-line bully, or merely a very grand grand tourer, and it does eat up the miles on a freeway with class and ease, but when you want to point it at a mountain pass, it excels there as well.

We drove the new 8 Series back to back with BMW’s also-new Z4, and what really stood out was not just the gulf in power and poise, but the huge difference in the ride/handling balance.

The M850i really can soak up the worst our roads can throw at it with aplomb, while still making you feel connected to the ground beneath you, and inspiring confidence, and its abilities really did make the Z4 feel very brittle and hard indeed.

To be fair, we didn’t get to throw this big luxo-barge at any sections of really sharp S-bends, or 35km/h corners, and no doubt it would be challenge for it to change direction quickly, but through fast sweepers it really does excel.

And as far as its grand-touring design brief, it absolutely nails it.

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. 

BMW is sticking with its not-very-industry-leading three-year, unlimited-kilometre warranty, and says its customers are happy with that, rather than the five- or seven-year warranties some other companies offer. When you’re paying this much for a car, it seems a trifle mean, frankly.

Like all modern BMWs, the servicing requirements for your M850i are controlled by the Condition Based Servicing (CBS) system, which means that “advanced algorithms monitor and calculate the conditions in which a vehicle is used, including mileage, time elapsed since its last service, fuel consumption and how a vehicle is driven”. 

That information allows the car to decide for itself when an annual vehicle inspection or oil service is due.

BMW offers two fixed-price servicing plans, under its BMW Service Inclusive (BSI), which is available in two packages: Basic - $2,290 for five years/80,000km or $5,170 for Plus.

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.