Mercedes-Benz GLA-Class vs Kia Sorento

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 Kia Sorento S diesel AWD is a solid buy option in the lower-spec realm of the market. This AWD SUV is not spectacular but it manages to be competitive and, as a seven-seater with updated technology and some good features, it does have ample potential as a daily-driving family mover.

However, if you want more safety tech and more premium accoutrements, you’re likely better off forking out the extra $10,000 or so and getting a top-spec Sorento GT-Line instead.

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 Sorento’s exterior is stunningly inoffensive. So, for anyone looking for an SUV that won’t make passers-by dry retch that’s all boxes ticked, I reckon.

The cabin feels family-friendly and functional. It's a basic but well designed space, although there’s no getting past the fact this is at the cheaper end of the Sorento line-up as its cloth seats and expanses of hard plastic remind you.

That said, chrome-like touches and faux hand-stitching go some way towards balancing out that impression.

The low-slung dashboard with integrated 12.3-inch touchscreen dominates the front of the cabin in a good way.

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.

This Sorento is 4815mm long (with a 2815mm wheelbase), 1700mm high and 1900mm wide.

As mentioned earlier, the interior is quite basic and simply designed, but with a low-key classiness about it. 

The driver’s seat is six-way manually-adjustable with a pump-action for height, so pin-pointing your preferred position is a welcome minor workout unto itself.

The front seats are adequately comfortable without being too plush – that’s fine with me – and from there driver and passenger have ready access to plenty of storage and cupholders (including two in the front, four in the second row and two in the rear seat) and charging options (including two USB charge points in the front console and one 12V power outlet behind the centre console and one in the cargo area).

My teenagers weren’t impressed at all with the fact they had to plug their smartphones into charge points at the front. Oh, the torture!

The 12.3-inch digital multimedia system has Apple CarPlay and Android Auto, both wired or wireless, and it’s an easy-to-use set-up with a crisp screen.

Air-con is a manual-controls affair, second-row passengers get air vents only (on the rear of the centre console), and third-row passengers don’t get vents or fan controls.

The second row is reasonably comfortable with room enough for head, shoulders and legs to be on the right side of comfy.

It sports a bottle holder in each of the doors, and there’s a centre armrest in the second row with cupholders for the El Grande cups of whatever almond-infused crappuccino your obnoxious screenagers are currently addicted to. 

The second row is in a 60/40 configuration, which slides, reclines and folds down flat.

The third row is in a 50/50 configuration, a split-fold flat set-up, and it's the realm of mini humans – or you could put adults back there for any trip lasting longer than 10 minutes and you’ll be hated for life.

For those interested in packing potential space, the rear cargo area offers a listed 179 litres of storage capacity; a listed 608 litres in the rear cargo area when the third row is folded away; and 1996 litres when the second and third rows are packed away.

My test vehicle this time is the Kia Sorento S diesel AWD, which sits at the bottom of the four-variant Sorento line-up (S, Sport, Sport+ and GT-Line). There is a petrol version, but the Kia Sorento S diesel AWD has a price of $53,680 plus on-road costs.

Standard features include a 12.3-inch digital multimedia touchscreen (with wired/wireless Apple CarPlay and Android Auto), a basic digital driver cluster with 4.0-inch multi-function LCD display, AEB, blind spot collision avoidance assist, rear cross-traffic collision avoidance assist, 17-inch alloys (plus a full-sized spare), LED headlights, daytime running lights and fog lights.

It has cloth seats, six-way manually-adjustable driver’s seat, manual air-conditioning, second-row passengers get air vents only (on the rear of the centre console), and third-row passengers don’t get vents or fan controls.

Exterior paint choices include 'Clear White', as well as premium paint choices (all at an additional cost) such as 'Silky Silver' (on our test vehicle), 'Steel Grey', 'Mineral Blue', 'Gravity Blue', 'Aurora Black', 'Snow White Pearl', 'Volcanic Sand Brown' and 'Cityscape Green'.

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.

This Sorento has a 2.2-litre, four-cylinder common-rail diesel engine, producing 148kW at 3800rpm and 440Nm at 1750-2750rpm and that’s matched to an eight-speed dual-clutch auto transmission.

This is a generally clever and effective combination, but there is noticeable lag to acceleration from a standing start, no matter how hard you stomp the right foot.

It has all-wheel drive (part-time with lock mode) and driving modes that include on- and off-road options.

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.

Official fuel consumption for the 2.8-litre four-cylinder Sorento S diesel is 6.0L/100km on a combined cycle. 

Actual fuel consumption on this test, from pump to pump, was 6.6L/100km. 

This Sorento has a 67-litre fuel tank so – going by that fuel consumption figure – you should be able to get a driving range of about 1015km from a full tank.

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.

As I mentioned earlier, this SUV can feel a tad lardy at times, especially from take-off, but it exhibits slightly livelier characteristics soon enough. Just don’t climb into the driver’s seat expecting a dynamic experience.

Steering has a nice balance to it and the Sorento never feels gargantuan so navigating through busy city and suburban streets is on the correct side of easy.

Ride is a bit firm, but the all-pervasive mindful peace you experience from being in such a hushed cabin tends to mostly negate any minor discomfort you may otherwise feel from clipping every lump and bump on the road.

On-road driving modes are 'Comfort', 'Sport', 'Eco' and 'Smart' and off-road modes are 'Sand', 'Mud' and 'Snow'. All of these adjust engine outputs, throttle control and transmission behaviour to best suit the terrain and driving conditions.

Niggle: The driver-assist tech is a bit abrupt and intrusive. I’ve found this to be the case in Hyundai SUVs, too.

The traffic sign recognition, in particular, is clunky, reacting to signs that don't apply at that time of day, for example school signs, or it reacts to signs that don't actually apply to that section of road. So it's regularly chopping and changing between what speeds you should be at and what speeds you shouldn't. 

This Sorento is an AWD with 176mm of ground clearance so I tested it on muddy grass, firm sand and gravel tracks. Nothing outrageous, but mildly challenging enough to make sure the all-wheel drive system can do what’s expected. And it does, seamlessly.

These off-road drive modes are, of course, no substitute for 4WD, but they are fine for when conditions become a little bit slippery. For example, if there’s been a drizzle of rain on the bitumen or the dirt track becomes a bit muddy.

This Sorento has a maximum towing capacity of 750kg (unbraked trailer) and 2000kg (braked).

The Kia Sorento has the maximum five-star ANCAP safety rating from testing in 2020.

Standard safety gear include seven airbags*, AEB (with car, pedestrian, cyclist and junction turning assist, from 5.0km/h to 85km/h; car detection up to 75km/h), as well as forward collision warning, blind-spot monitoring, rear cross-traffic alert, lane departure alert, front/reverse parking sensors and more.

*Note: the curtain airbags only cover the first and second rows.

Because this is the entry-level Sorento it misses out on such handy tech as the side parking sensors, 360-degree around-view monitor and blind spot view monitor that are found in higher spec variants.

The Sorento has five top-tether child restraint anchorage points and four ISOFIX child seat mounts (two in the second row and two in the third row).

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.

A seven-year/unlimited km warranty applies to the Sorento line-up.

Servicing intervals are scheduled for every 12 months or 15,000km, whichever occurs soonest.

Capped-price servicing covers seven-years/105,000km and at the time of writing ranges between a low of $370 and a high of $817 per service over that period. Total cost is $3787 for an annual average of $541, which isn't particularly cheap.