Mercedes-Benz GLA-Class vs BMW X3

What's the difference?

With Mercedes-Benz’s vast number of SUVs, there is room for an urban luxury crossover niche, and the GLA delivers in spades.

Indeed, in 250 4Matic guise, it is that rare thing – a high-riding hatch with dynamics to shame most dedicated pocket-rockets. It really is a hoot if you find the right road, regardless of weather conditions. The Benz has towering talent.

However, even without desirable options like adaptive dampers and a full suite of driver-assist safety technology, the GLA is expensive, does not quite carry off the price tag from an interior quality point of view, and struggles to maintain the degree of comfort and refinement expected from a Mercedes – with or without the $3K necessary to score adaptive dampers.

Still, especially because of the way the GLA looks, goes, stops and steers, if you can afford it, you’ll be rewarded. There’s never been a more rounded GLA.

The X3 xDrive30e is a sporty SUV with fantastic ride quality and slick driving characteristics, although its specs seem a bit behind on the electrified front despite it being the most expensive PHEV of its peers.

This leaves it with an odd split personality of being particularly limited to tight city driving to make the most of its EV features, while its engaging nature beckons more to the open road than some of its rivals. A jack of two worlds perhaps, but a master of neither.

Looking like a mini-me GLC, today's GLA trades some of its predecessor’s edgier design elements like the slammed roof and exaggerated broad-shouldered stance for a more amorphous if elegant appearance. Even with the cliché plastic cladding around the squared-off wheel arches, it’s still a looker.

The net result is arguably the most attractive of all the MFA2 A-Class offshoots. It sits well within the Mercedes hierarchy of SUVs, bringing a swoopy coupe-like silhouette compared to the ultra-upright GLB.

Along with being 30mm wider, it’s also visibly taller than before, with a handy 213mm of ground clearance compared to just 157mm last time around. And the wheelbase has been stretched to the benefit of rear-passenger room – a bugbear of the old GLA. That's progress.

The X3 is iconic BMW, having come to be the face of the brand for many buyers, the mid-size SUV exemplifies the Bavarian marque’s ‘kidney grille’, sharp and tall lines, and strongly defined body.

It’s part dainty luxury car and part buff Germanic tourer in equal measure. Suffice it to say fans of the brand will love it, but it’s not going to make converts of anyone else.

Newer design elements which adorn the X3’s body include the striking tail-light design, and little plastic fills below which combine with its contrast bumper and dual-exhaust ports to make for a sporty looking SUV.

The wheels look enormous and add enough chrome to the picture to keep it looking sleek, while subtle badgework has always been a hallmark of a good BMW.

BMWs have always had a relatively minimalist take on the interior design, and overall this is a space in which progress has been made at a glacial pace throughout the brand’s history, wild 7 Series limos being the exception to the rule.

This means the X3 gets the iconic centre-panel, ever so slightly oriented to the driver which houses the two centre air vents and climate control buttons, and a small panel below which houses the volume knob and shortcuts for the radio.

The digital revolution has very much come to the interior of this SUV though, as the top of the dash is adorned with a single enormous panel, and a second one set in the instrument binnacle in a classic fashion. It will all be quite familiar, even if you’ve skipped a BMW generation or two.

The wheel is a key touchpoint, clad in a lovely soft padded leather but with a chunky three-spoke design and massive notches at 10 and two for you to rest your hands on.

I don’t like this wheel in the brand’s more dainty sports cars like the Z4 where it feels too big, but it definitely feels at home in the X3.

Quality materials with plenty of soft-touch plastics and leather trims extend their way into the door, while the software is appealing in its design and fast to respond; clearly backed by strong hardware.

A final thing worth noting is the X3 has one of the more dated interiors in the BMW range. While it has been augmented with digital upgrades over the years, it doesn’t feel as contemporary as the incoming range of cars with the next-gen design elements. Take a look at the iX’s spectacular interior for what you’re missing out on.

Compared to before, the 2021 GLA is some 122mm taller, so ushers in a higher hip point for loftier seating – reducing that jumped-up hatch feel. Headroom improves obviously, as does rear legroom, a corollary of a 30mm wheelbase stretch (to 2729mm).

Wide apertures also make entry into and out of the German-built GLA child's play, though the solid heft of their doors is serious business at this end of the segment, very satisfyingly Teutonic and totally on-brand. This is something you won’t enjoy in a Subaru XV.

Then you s-c-r-a-p-e the underside of the front doors on the pavement literally every time you swing it to get out, and wonder whether Mercedes engineers have ever been to Australia. This fail drove us spare. Heaven help the GLAs in towns and cities with bluestone sidewalks. Maybe all that extra AMG packaging is the culprit.

Still, most of the other basics are spot-on and can’t really be faulted; cosy yet spacious for four adults – especially up front, ample vision, an excellent driving position aided by heaps of seat and steering wheel adjustability, cosseting front sports buckets that you just sink into, torrents of ventilation from those delectable turbine vents and stacks of storage. Collectively they make the GLA a welcoming, opulent place to travel in. Only the hapless fifth occupant squished between the outboard rear-seat passengers might think otherwise. But nobody buys this Benz for carting people around. That's the GLB's job.

Several years ago, Daimler poached a senior Audi designer and since then Mercedes’ dashboards have morphed into a multi-coloured multimedia diorama of touchscreen technology that threatens to completely take over the universe. Choose the right combination of colours and lighting and it's like your very own White Night on wheels. Starting with 2018’s A-Class, the striking, spangly MBUX system that underpins all this has come to be widely admired and imitated. For aesthetics anyway, with its vivid hues, panoramic displays and simple, tiled applications, it’s been a real trip.

Anyway, back to reality. From a tactility and functionality point of view, there’s still work to be done.

Access to the multimedia (including our GLA's banging optional audio system) and car settings areas is possible via a mildly fiddly finger-pad arrangement down forward in the centre console, or smaller yet much more annoying thumb sensor tabs on the wheel spokes. These are not easy to modulate on the move. Additionally, their menus can be confusing to navigate through and sometimes counterintuitive in operation. Mercedes obviously realises this as a quick-guide pamphlet is provided on old-fashioned cardboard paper. How quaint.

Eventually all areas can be mastered over time, but the functionality is complicated and may overwhelm the not-so-tech savvy. Additionally, the ‘Hey, Mercedes!’ voice control is impressive for getting MBUX to perform basic multimedia and vehicle settings-related changes, but it too-often erratic, unreliable and ultimately frustrating for more complicated commands. Perhaps elocution lessons on behalf of the operator may help.

But not as much as the profound disappointment we endure from the cheapness of some of the materials, the wincing cellophane-like sounds when pressing on some of the surfaces such as the door cards, or that emanate after a particularly bumpy section of bad roads. Sheeny reflections and hard textures in a car optioned with extras that total up to nearly $82,500 just don’t cut it.  

At least in this latest-gen GLA, the rear seat area seems much improved over the previous models, with more space, comfy and supportive seating (remember ours featured the $607 sliding function that ought to be standard) and a reclining backrest. All amenities are present, with deep pockets, fresh air from twin vent outlets, reading lights and thoughtfully placed armrests – but, again, the latter’s extendable cupholders feel brittle and cheap.

Further back, the 435-litre cargo area is sufficiently sized and practical for smaller family use (at last), aided by a 40/20/40 backrest fold and that slide-able cushion to extend capacity further. There is no spare wheel, but a tyre inflation kit is fitted in lieu.

Overall, then, better than before, with that fundamental rock-solid heft, luxurious aura and alluring premium-car aroma. The dazzling MBUX screen-related visuals, too, are endlessly entertaining to explore when the vehicle is not moving, but the GLA’s cabin is still not quite up to Mercedes’ reputation for exacting over-engineered excellence.

Or even to the standards of some mainstream alternatives.

The X3 is reasonably large on the inside, with a commanding road view and healthy space for an adult in both front seats. The tall roofline leaves plenty of room for someone my 182cm height, while leather-clad soft-touch finishes are present for your elbows and knees.

There’s a large bottle holder and thin bin in each of the front doors, and a wide centre console with a further two bottle holders with adjustable ridges and a large storage bay suitable for a phone below the climate cluster.

This area also houses a USB port and a little shaped notch for you to place the key, and the whole area can be covered over with a retracting lid.

Like all BMWs there are well hidden shortcut buttons for many of the functions which integrate into the design, and there’s a multimedia screen function for most functions, too, controlled through the centre dial system, or via touch.

It’s nice to have both, unlike some Mazdas which use a similar control system, but force you to rely on the dial.

The second row looks a bit flat from a distance, but you do sink into the leather-clad seats nicely, and unlike some rivals in this category, the second row is fixed and not on rails.

Room for a 182cm tall adult is decent, with a little more than adequate knee room and excellent headroom.

The leather trims continue, and true to the sense of being a premium brand the intruding piece of wheelarch is also clad in padded leather. No touching plastic in here.

A single bottle holder appears in each of the rear doors, with a further two in the drop-down armrest, and there’s a netted pocket on the back of each of the front seats.

Rear passengers get their own climate zone with an independent control panel as well as a 12V outlet and two USB-C ports.

Luggage capacity in the boot is rated at 450-litres (VDA), significantly down on the combustion versions of this car. Note in the pictures the stepped boot floor, which is adorned with a chrome trim piece for some reason, as though the car is always reminding you of the lost room.

Still, the squared-off space managed to fit our three-piece CarsGuide luggage set with relative ease and room to spare. There is a thin and narrow slot under the boot floor which serves as a location to place your charging cables.

This plug-in version of the X3 sits near the top of the X3 range, eclipsed only by the M40i performance variant and the fully-electric iX3. This means a starting price of $104,900, which initially doesn’t bode too well for the BMW given its rivals can be had at a lower price.

The similarly-specified Mercedes-Benz GLC 300e starts from $95,700, the Volvo XC60 Recharge starts from $97,990, and the impressively-specified newcomer on the block, the Lexus NX450h+ is the best value of the lot at just $89,900.

You’ll note all of those plug-in models are of the higher specification in their respective ranges, with each manufacturer clearly trying to draw buyers into this tough-to-understand tech by compensating the curious with gear which would otherwise be optional on a pure combustion car.

There are technical elements which play into the value of each when it comes to the PHEV drivetrain which we’ll look at later in this review (it’s particularly important when it comes to how you use and park your car) but we can at least say the X3 xDrive30e comes with a healthy amount of equipment.

Most of this matches the xDrive 30d below it, including large 20-inch alloy wheels, a set of M sport trims, brakes, and adaptive suspension, 'Vernasca’ leather interior trim, adaptive LED headlights and LED tail-lights, ambient interior lighting, a 12.3-inch multimedia touchscreen with wireless Apple CarPlay and Android Auto connectivity and built-in navigation, a second 12.3-inch screen for the ‘Live Cockpit’ digital instrument cluster, tri-zone climate control, a head-up display, electrical adjust for the driver and front passenger seats, a 12-speaker sound system, and the functionality for over-the-air updates.

The specific inclusions for the xDrive30e include free optional paint colours, a panoramic sunroof, lumbar support in the driver’s seat, front seat heating, wall socket to Type 2 and Type 2 to Type 2 public charging cables, and specific i-branded interior elements.

Normally the sunroof and premium paint are part of a $5400 option pack, while the heated seats, steering wheel, and lumbar support seats are normally a $1200 option, meaning the PHEV variant only leaves you $3400 and a set of ‘Laserlight’ LED headlights worse-off than if you were to apply the same options to the xDrive30d.

Not bad considering it also packs a 12kWh Lithium battery under the boot floor, and a secondary electric motor integrated into its transmission. More on this later.

Mounted transversely, Mercedes’ M260 1991cc 2.0-litre four-cylinder petrol engine features a twin-cam, 16-valve design, a twin-scroll turbocharger and variable-valve timing, to help deliver 165kW of power at 5500rpm and 350Nm of torque at a low 1800rpm. With an impressive 97.2kW per tonne, it can hit 100km/h in 6.7 seconds, on the way to a 240km/h top speed.

All four wheels are driven by an eight-speed dual-clutch transmission (DCT), though most of the torque at lower speeds or during reduced throttle loads is delivered to the front wheels until extra traction is required out back. The gearbox is one of the very best of its type we’ve experienced – seamless, strong and largely lag-free.

The PHEV version of the X3 pairs the brand’s usual 2.0-litre four-cylinder turbocharged petrol engine with a relatively powerful electric motor integrated into its eight-speed torque converter automatic transmission.

On its own, the engine produces 135kW/300Nm, while the electric motor is capable of punching out 80kW/265Nm. When working together, the EV components can provide a further electrified boost, for a total of 215kW/420Nm, allowing for a 0-100km/h sprint time of 6.1 seconds. This makes the 30e only slower than the M40i and 30d variants in the rest of the X3 range.

The xDrive30e is capable of travelling up to 135km/h under electric power alone, with a surprisingly small 12kWh battery delivering around 41km of pure EV range.

As the electric motor is mounted in the transmission it is capable of driving all four wheels via the brand’s 'xDrive' system with torque vectoring.

Somewhat amusingly, the German documentation for the X3 includes a section for “off road characteristics” (I suppose it is an SUV after all…) and for those interested the xDrive30e can ford at up to 500mm depth, has an approach angle of 25.6 degrees, a departure angle of 22.8 degrees, a breakover angle of 20.0 degrees and a ground clearance of 204mm. Enjoy the trails.

Weighing in at 1668kg (kerb), and with a bluff nose and high ground clearance also not helping, we didn’t expect great fuel economy, particularly given how hard and fast the GLA 250’s performance bandwidth is. It’s tempting to just blast your way from point A to point B.

However, at the pump we averaged 9.8 litres per 100km, which isn’t too bad at all considering the available muscle. The official figure is 7.5L/100km, for a carbon dioxide emissions rating of 170 grams per kilometre. With a 51-litre fuel tank, the theoretical range is around 680km.

Note that the GLA 250 requires 95 RON premium unleaded petrol as a minimum.

Here’s the tricky bit. The X3 xDrive30e has an official combined fuel consumption of just 3.2L/100km, but this will depend heavily on how you drive it.

You see, the BMW hybrid system is very keen to drive under electric power alone, even in the so-called ‘hybrid’ driving mode. This will mean you will extinguish the battery’s 41km driving range (or 35km according to our test vehicle on a full charge) quite quickly, whether you like it or not.

Plus, the charging capability is a bit slow. At 3.7kW, the PHEV X3 charges its 12kWh battery up in 2.6 hours on a faster public outlet or garage wall box, or around five hours on a wall socket.

To put it in perspective, the Lexus NX 450h+ showed me nearly double the amount of electric driving range on a single charge (65km as-tested) and was capable of charging up at a rate of 7.2kW, meaning a two hour flat charge for twice the range on a public outlet.

The summary boils down to: If you charge up at home, this won’t be as much of a problem, if you need to rely on public charging, it could make a difference to the PHEV you pick.

You can prolong the life of the battery using the ‘battery level’ mode which lets you set a target for battery life and have the car switch to primarily combustion at that point.

This can come in handy if you have a lot of open-road driving, and want to conserve the battery for driving around town where it is most efficient.

On my week with the car I saw an impressive consumption figure of 2.2L/100km according to the trip computer, under the official number, while my energy consumption came in at 20.7kWh/100km against a claim of 16.4kWh/100km. I did make sure to charge the car up at every opportunity, however.

Like all BMWs the X3 xDrive30e requires mid-shelf 95RON unleaded fuel, and has a 50L fuel tank despite the addition of its high-voltage battery.

A soaring 2.0-litre turbo engine application, this is a slick, stirring and robust performer that can also do efficiency as effortlessly as launch the GLA 250 4Matic towards the horizon. Let’s not mince our words. This is a fast and fiery mover.

Three drive modes – Eco, Comfort and Sport – provide a wide spectrum of acceleration and throttle responses, and all deliver precisely what you’d expect. Eco’s fine for pottering around town smoothly and serenely; Sport morphs into a searing and seamless speed demon; and the default Comfort sits somewhere in the middle as the best of both worlds. There really is no faulting Mercedes’ M260 masterpiece.

The DCT also happens to be one of the better dual clutch autos, avoiding the lag and clunkiness pitfalls usually associated with this sort of gearbox. It’s even comparatively smooth off the line on hills. Ours came with the optional handy set of manual-mode paddle shifters, adding a welcome level of interactivity autos tend to overlook. Too bad Mercedes persists with that fiddly column lever that is forever prone to knocking the car out of drive. Even after 15 years, it's still so annoying.

What all this means for the urban driver is strong acceleration for flitting in and out of traffic gaps, as well as incredibly instantaneous point-to-point responses for commanding manoeuvrability, thanks to ultra-eager steering and assisted by outstanding brakes.

With struts up front and a multi-link rear end as standard, the GLA 250’s chassis, too, is a transformative for what is essentially a high-riding hatchback – but only if your pockets are deep enough.

Fitted with that near-$3K AMG Exclusive Package that includes adaptive dampers, our Benz displayed a definite hot-hatch attitude that really would make it the darling of Golf GTI owners who’ve outgrown their rides but not their girl/boyracer desires. Superb handling and hunkered-down roadholding really do make this the driver’s premium compact crossover. You can pretty much point and shoot this Merc as you might a Golf R, and likewise in most weather conditions thanks to all that reassuring tenacious grip.

Plus, if you’re put off by the hard ride in Sport, the Individual mode allows the driver to engage the soft damper mode while the engine and steering retain the hardcore settings. It’s a win-win situation – as long as you can stretch to that AMG Exclusive pack. We strongly recommend it, given the balance between ultimate high-speed control and comfort.

However, while this is all good news for rural and country folk seeking hot crossover fun, back around town, poor urban road conditions can reveal a flaw in the chassis’ ability to properly smother bumps and ruts. It’s the small frequency stuff that seems to transmit through, never really settling down.

The result is a jittery ride, that may somewhat undermine the GLA’s upmarket sheen. There’s also a fair degree of road noise coming through. Perhaps sticking with the 19-inch alloys instead of those lovely 20-inch rims is the solution here.

One of the things I came to love most about this version of the X3 is how seamless the hybrid system is, and how unusually quiet and comfortable this car proved to be.

Sure, it’s a luxury mid-size SUV, but I came away particularly impressed with how the adaptive suspension tune pairs so nicely with the electrified acceleration to make for a sleek driving experience.

Despite its dimensions, the xDrive30e feels light and springy over bumps, filtering out the worst of the road while keeping a good level of control at the wheels.

The stock steering tune in the car’s standard ‘hybrid’ driving mode is nice and light, too, making this mid-sizer feel smaller than it really is to pilot, and you don’t feel the extra weight of the battery pack at all.

The combustion engine is so quiet it is at times difficult to tell when it enters the mix, aside from the fuel consumption meter on the dash suddenly coming to life.

It too is a smooth unit, providing partially electrically-assisted acceleration in most modes which makes it hard to tell when the transmission changes cogs. It’s as though you get the best of both worlds this way.

The car is a bit too keen to rely on its electric driving, and, as mentioned earlier, this will mean it drains its battery relatively quickly unless you take extreme measures like the battery saver mode.

The result is a car which is far better suited to shorter city-based journeys than long tours through the country. At least the turbocharged engine and BMW driving dynamics are left intact should your battery run dry.

The regen braking is mild (able to recoup a max of 20kW at any given moment), although the indicators on the dash are neat for letting you know the limit of your electric acceleration and how far you’ve travelled without using the combustion engine.

On my week with the car I managed over half the distance with the engine completely off. Think of the fuel savings.

Elsewhere the X3 offers great visibility thanks to a boxy shape with big windows, and solid electric acceleration, with decent handling, too. I’d say it feels sportier than the Lexus NX or Merc GLC equivalents, with the ride a bit more forgiving than that of the Volvo XC60 Recharge.

As an EV then the xDrive30e is notably limited, but as an SUV which threads the needle of being both engaging and comfortable, it’s possibly the best of the current premium mid-size SUV PHEV pack.

The X3 range has a healthy list of standard active safety equipment, with items like freeway-speed auto emergency braking, rear auto emergency braking, lane departure warning with lane keep assist, blind-spot monitoring with rear cross-traffic alert and adaptive cruise control.

It also has a speed limit assist function and a rather cool parking suite which gives you a 3D surround picture of the car capable of adjusting to particular angles when objects get close.

The X3 has the standard array of dual front, dual side, and dual head curtain airbags, as well as seatbelt pre-tensioners. There are dual ISOFIX points on the outboard rear seats, or three top-tether mounts across the rear row.

The base X3 offerings have a maximum five-star ANCAP safety rating to the 2017 standard, although this plug-in hybrid variant was not available at the time.

Unlike many luxury brands that persist with a sub-par three-year warranty, Mercedes-Benz offers a five-year/unlimited kilometre warranty.

Intervals are every year or 25,000km, with a capped price service plan starting at $550 for the first year, $750 for the second year and $1250 for the third year, totalling $2550. Alternatively, buyers can also choose a Service Plan, starting at $2050 for the first three years (saving $500 from the normal capped-price service plan), $2950 for four years and $3500 for five years.

BMW languishes with just three-years of warranty coverage. The brand along with its Mini subsidiary has become a notable laggard in the space now, its last remaining Audi rival has moved on to match the five-year and unlimited kilometre promise of its VW parent.

Servicing on BMW models is ‘condition dependent’ meaning the car’s computer will keep track of when servicing needs to happen based on how the car is driven and other factors.

A five-year ‘basic’ service pack is available inside the first 12 months of purchase and covers visits inside this period or 80,000km whichever occurs first. It costs $2010, or $402 a year.