Mercedes-Benz GLB-Class vs Kia Niro

What's the difference?

It’s easy to say the GLB35 doesn’t deserve to be called an AMG when looking at its credentials on paper, but get behind the wheel and it’s evident Affalterbach played a key role in making it feel as special to drive as it should be.

The GLB35 has all of the great qualities of the GLB250 and other GLB variants, but successfully adds a performance focus to make for an even more compelling package.

Indeed, the GLB35 proves you can pretty much have it all.

The Kia Niro S Electric is a solid little SUV that has decent space inside and some nice specs, but it's more expensive than its nearest rivals. The EV powertrain can take a little getting used to and I would have liked a smoother ride, but the 460km driving range is good.

For first-time EV owners, this wouldn’t be a bad option if you wanted to dip your toes in the water but it will suit urban dwellers and smaller families, like mine, best. This gets a 7.5/10 from me.

My son wasn’t in love with this one. Not enough buttons for him to press and he did comment on how bumpy the ride was in the back. He gives it a 6.0/10.

With the boxy and therefore rugged-looking GLB laying some great foundations, it’s no surprise the GLB35 looks pretty damn good – to these eyes, at least.

Being an AMG model, it stands out from the crowd with an aggressive body kit, with the chunky bumpers, aerodynamic roof spoiler and racy rear diffuser all unique alongside the now-signature Panamericana grille insert.

A set of 20-inch alloy wheels with 255/40 tyres ups the ante at the side, where the carryover black plastic wheel-arch and skirt cladding serves as an obligatory reminder that this is an SUV.

Also of note are the nicely designed LED headlights and tail-lights, which literally light the way, but there’s no getting past the bespoke diffuser element, which integrates the sports exhaust system’s dual 90mm tailpipes.

Inside, the GLB35 is a technological tour de force, with a pair of 10.25-inch high-resolution displays proudly sitting side by side atop the dashboard, with one the central touchscreen and the other the digital instrument cluster.

Both are powered by Mercedes-Benz’s MBUX multimedia system, which arguably remains the best there is today thanks its speed and breadth of functionality and input methods.

The GLB35 is also properly premium. Lugano leather upholstery covers the seats and armrests, while Nappa trims the sports steering wheel. Even the door shoulders and inserts get ‘cow hide’, although theirs is of the artificial variety.

Soft-touch materials are used for the upper dashboard, leaving hard plastics to the lower sections, which is what you’d expect for the price.

While the black headliner makes for a dark cabin, brightness comes from the metallic trim used throughout, notably on the steering wheel, dashboard, doors and centre console. And let’s not forget the pop of colour provided by the addictive ambient lighting.

And mercifully, scratch- and fingerprint-hungry gloss-black accents are limited to the surrounds of the turbine-style front air vents, dual-zone climate controls and centre console.

Unique to the GLB35 are Carbon Structure trim and stainless-steel sports pedals, just in case you forgot you weren’t driving a regular GLB.

It’s a compact SUV with a footprint that's 4420mm long, 1825mm wide and 1570mm tall. But while small, I wouldn’t call it cute. It’s boxier than its sibling and without any of the swoopy design elements that make the EV6 look cool. 

I do like the way the two-tone body panelling, which is seen most prominently on the C-pillar, breaks up the ‘blocky-ness’ and creates areas of interest. As do the high-mounted rear LED lights. 

Speaking of lights, the base model makes do with halogen headlights, which unfortunately stand out against the LED daytime-running lights. You’ll notice the dimmer light at night, too.

The 17-inch alloy wheels are thick for better aerodynamics but the clever two-tone colouring stops them from looking unfashionable.

The interior has a lot style cred with the curvature of the door panelling blending in almost seamlessly with the dashboard.

The gently sloping panelling that houses the multimedia systems and switchable touchscreen interface for the controls creates a very pleasing cabin space.

There are some harder plastics mixed in here but enough soft touchpoints that you won’t be bothered by them. 

Measuring 4650mm long (with a 2829mm wheelbase), 1845mm wide and 1660mm tall, the GLB35 is more like the GLC43 in size than the GLA35, making it a mid-size SUV despite its small underpinnings. And that is good news for practicality.

Cargo capacity with the 50/50 split-fold third row stowed is more than solid, at 565 litres (VDA), but it can be increased to a cavernous 1800L with the 40/20/40 split-fold middle bench also not in use. If six or seven passengers are onboard, though, there’s very little room to move.

Nonetheless, the boot is still well packaged, featuring a huge aperture, no load lip, and a flat floor, which make loading and unloading bulkier items a hell of a lot easier. And even the load cover can be stored underfloor when out of action. How good.

There are also four tie-down points, two bag hooks, a side storage net and a 12V power outlet on hand to make matters even easier, while the rear seats can be stowed from the boot.

While we’re on the topic, Mercedes-Benz says the third row can accommodate passengers up to 168cm tall, with the middle bench able to slide fore and aft by up to 140mm.

Yes, I'm too tall, at 184cm, but I can still sit in the very back, although not in total comfort. All in all, about a centimetre of legroom and negligible headroom and toe-room are on offer there for me.

That said, getting in and out in the first place is the real challenge here, with the middle bench unable to tumble forward for easy ingress and egress. Yep, you’re not going to look smooth either way. Children can deal with it, but adults won’t be thrilled.

Therefore, the middle bench is the place to be, even when it’s slid all the way forward. Behind my driving position, it offers about a centimetre of legroom, but this can be increased to several inches by sliding it all the way back.

Either way, plenty of toe-room is available alongside more than an inch of headroom. The latter is more impressive when you consider that’s what you get with the standard dual-pane panoramic sunroof fitted.

Even better, the second row can seat three adults at a pinch, partly thanks to the low transmission tunnel, which means there’s the right amount of space for six fully grown feet across the two footwells. It goes without saying children will again be fine.

Speaking of which, four ISOFIX and five top-tether anchorage points are on hand for fitting up to four child seats across the second and third rows, which makes the GLB35 a serious option for families that like to be sporty.

There are plenty of in-cabin storage options, with the large central storage bin featuring a pair of USB-C ports, while the glovebox is also quite useful, even if it is oddly shaped. And there’s also a sunglasses holder in front of the rearview mirror.

The centre console’s cubby isn’t really designed for storage, with it basically taken up by two cupholders, another USB-C port and a wireless smartphone charger.

The front door bins can accommodate one small and two regular bottles each, which is great, while their rear counterparts can take one small and one regular apiece.

Second-row occupants also have access to a fold-down armrest with another pair of cupholders, but being of the retractable variety, they’re flimsy.

These passengers also have two USB-C ports, with the pair folding out below a small cubby and air vents, which are found at the back of the centre console. Storage nets are also fitted on the front seat backrests.

And don’t worry; the third row gets in on the action, with two cupholders (one regular, the other small) splitting the seats, which have individual USB-C ports and device straps to the sides.
 

It’s surprisingly roomy inside and all passengers will enjoy decent leg and headroom, but taller passengers will find the backseat cosier than the front.

As such, two child seats will fit best but you do have ISOFIX child seat mounts on the outboard positions and three top-tether points, if you need them.

The synthetic leather/cloth seat trim cleans well and is nice to touch. The seats themselves, front and rear, are well-padded and super comfortable.

The backs of the front seats can double as coat hangers and have hardened kickplates, which are always practical for little feet.

The front row gets the most amenities and tech. The 8.0-inch touchscreen multimedia system has clear graphics but is different to other Kia’s I’ve sampled recently. It seems to have been simplified but you’ll get used to it quickly.

There are plenty of charging options available, too, with a USB-A and C port, plus a 12-volt socket. Not needing a cable for the wireless Apple CarPlay is a bonus, too!

The front row also has the most storage space with two retractable cupholders, dedicated phone tray, glove box, middle console and skinny drink bottle holders in each door.

Back seat passengers enjoy two USB-C ports, reading lights, drink bottle holders in each door plus an armrest with two cupholders. As well as, a standard three-pin socket in case you need to run electrical gear or charge anything up on the go.

The windows are wide and offer good visibility but I really like the 150mm ground clearance. It was super easy for my six-year old to climb in and out, plus he got a good view this week!

The boot is good for this size SUV with 475L of capacity available. It does look more like a hatchback, because while you can readjust the floor to sit lower, the back still slopes up.

However, it was fine for my weekly grocery and school run. The 'frunk' storage is small at 20L, which is just big enough for a charging cable.

You don’t get a spare wheel but you do get a puncture repair kit. And being the base model, it’s not a powered tailgate but it’s not heavy to close.

There are two variants for the Niro, our base model, the S, and the range-topper GT-Line.

Despite being the base model, the Niro S will still set you back $65,300, before on-road costs. Which makes it about $5K dearer than the equivalent Kona Electric, and $20K more expensive than the ZS EV.

There is a hybrid Niro (also available in two grades), if you’re not quite ready to commit to a full EV life. The price isn’t as eye-watering, either, being just $44,380, before on-road costs.

The Niro is well-specified, though, and the driver will enjoy an electric seat with adjustable lumbar support while the passenger side remains manual.

The regenerative braking is customisable (levels 0-3), there’s an 'iPedal' function, a dual-zone climate system, reversing camera and the backs of the front seats even double as coat hangers.

The tech is also good, with an 8.0-inch touchscreen multimedia system, 10.25-inch digital instrument panel plus wireless Apple CarPlay and wired Android Auto all coming as standard equipment. More on the tech below.

The GLB35 is powered by an uprated version of the GLB250’s 2.0-litre turbo-petrol four-cylinder petrol engine, with the AMG-fettled version producing a more substantial 225kW of power from 5800-6100rpm and 400Nm of torque from 3000-4000rpm (up from 165kW/350Nm).

This version is also matched to an eight-speed dual-clutch automatic transmission as well as Mercedes-AMG’s front-biased but fully variable 4Matic all-wheel-drive system.

Thanks to this combination, the GLB35 can sprint from 0-100km/h in just 5.2 seconds with launch control enabled, while its electronically limited top speed is 250km/h.

The Niro is a full EV and has a front-wheel drive drivetrain with a maximum output of 150kW/255Nm. It’s not as powerful as its stablemate and only has the single-motor which is powered by a 64.8kWh lithium-ion battery but going from 0-100km/h can still be achieved in 7.8 seconds. With specs like those, this is most suited for an urban setting.

The GLB35’s fuel consumption on the combined-cycle test (ADR 81/02) is 8.3L per 100km, while its carbon dioxide emissions are 186 grams per km. All things considered, both claims are pretty decent.

In our real-world testing, though, we averaged a high 14.1L/100km over 75km of driving split between highways and country roads, so not your typical mix, then. A heavy right foot also played into that result, so expect a better return after a regular run.

For reference, the GLB35’s 60L fuel tank can be filled up with 98RON petrol at minimum.

Such is the EV life but you can’t escape the charging.

The onboard DC charger has up to 85kW of capacity and that means on a 50kW fast charger station, you can get from 10 to 80 per cent in 65 minutes.

However, if plugged into a 350kW ultra-fast charger, you’ll only save 22 minutes because it can’t accept that faster speed.

On a 7.5kW system, you’ll go from 10 to 80 per cent in approximately nine hours, 25 minutes. On an 11kW, you’ll see that figure drop to six hours, 20 minutes.

The charging port is a Type 2 (CCS Combo2) and the car comes with an emergency charging cable that can plug into a standard three-pin domestic socket, if needed.

However, it’s slow going and you’re looking at a wait time of up to 27 hours, 30 minutes to get to a full charge. All other cables cost extra.

The official kWh/100km consumption is 16.2kWh and my average on-test figure was 14.3kWh after a mix of urban and open-road driving.

However, I did see figures getting closer to 20kWh on longer trips. Still, I would consider my average to be efficient.

The Niro S has a driving range of up to 460km (WLTP).

Don’t let the GLB35’s family friendliness fool you, this is an SUV that can get up and go.

The engine’s extra power and torque over the GLB250 are immediately felt behind the wheel, with the GLB35 accelerating with the vigour of an all-wheel-drive hot hatch, which makes sense given their similar claims.

And if you have one of the sportier drive modes engaged, the booming noise generated is also special – even if a lot of it is of the artificial variety, pumped into the cabin to make occupants feel like things are getting serious.

What is genuine, though, is the well-rounded transmission, which is characteristically quick with its upshifts. At the same time, it’s also relatively smooth, even at low speed, which has proven to be a challenge for dual-clutch units over time, but not here.

To earn the AMG badge, the GLB35 goes even further with other mechanical upgrades, including sports tunes for the suspension and steering.

Specifically, the GLB35’s independent suspension set-up not only consists of MacPherson-strut front and trailing-link rear axles with adaptive dampers, but also introduces new steering knuckles, transverse control arms on the front axle, and a stiffened subframe.

The resulting ride is actually quite good. Yes, the extra firmness over the GLB250 is noticeable – particularly in the sportier drive modes that stiffen the adaptive dampers all the way – but it’s by no means a deal-breaker.

That said, it’s worth noting our test vehicle was fitted with the optional 21-inch alloy wheels ($1990), so the GLB35’s like to ride even better on its standard package.

This is remarkable considering the handling improvements made, with the GLB35 managing body roll and pitch better than the GLB250 when pushing hard into and around corners, coming out of which grip is plentiful thanks to the all-wheel-drive system.

Thankfully, the standard-fit high-performance braking package consisting of 350mm front and 330mm rear discs with four- and one-piston callipers respectively helped it wash speed away with ease when attacking the twisty stuff with intent, even with 1857kg (kerb) to deal with.

Also on hand is electric power steering, which is speed-sensitive and has a variable ratio in the GLB35. Basically, it’s quicker when you want it to be, remaining on the lighter side in hand until you engage one of the sportier drive modes and weight is increased markedly.

This is a pretty simple car to drive but it doesn’t feel as fun as some other EVs I’ve driven. It can even feel sluggish when you accelerate from a full stop and that makes it feel laggy in stop/start traffic.

Once you’re on your way, the acceleration is fairly responsive. You feel confident overtaking on the open road, too.

The car feels connected to the road with minimal shuddering through the steering wheel. The car responds in a timely manner when you have to make sudden moves, which I like.

Sometimes, the lane keeping aids make it feel jerky and I turned it off in some situations.

The regen braking delivers a big physical presence like the EV6 but isn’t as refined and can feel almost ‘bunny hoppy’ at times.

You can customise it up to four levels, zero being low regen and four being the iPedal. I’m not overly fond of the iPedal, so didn’t use it that much this week and kept it at level 3.

You do have to change up how you drive an EV, so this wasn’t that surprising and something I’m sure you’d get used to.

The ride comfort is pretty mixed. Around town, it’s good but there’s quite a bit of passenger movement in this. You kinda feel like you’re bobbing along sometimes, which is jolting.

You also feel the road but the seats are so comfortable, they stop it from feeling too rough. 

Surprisingly, the cabin gets very loud with wind and road noise. You can still chat but you won’t forget that it’s there, which is a shame.

I didn’t notice much difference between the drive modes, so it was kept on 'Normal', too. 

This is very easy to park! It’s a good size for even a tight car park with a 10.6m turning circle and the reversing camera is super clear, which is great. 

However, I would have liked to have seen front parking sensors, as well as the rear sensors. You can get them on the GT-line though.

The Niro EV S has a good list of safety features, with the following being standard: LED daytime running lights, lane departure alert, lane keeping aid, blind-spot monitoring, rear cross-traffic alert, a reversing camera (with dynamic guidelines), rear parking sensors, driver fatigue alert, check rear occupant alert and adaptive cruise control (with stop/go function).

It has auto emergency braking with car, pedestrian and cyclist detection as well as junction turning assist, which is operational from 5.0-85km/h. 

The Niro was recently awarded a maximum five-star ANCAP safety rating in 2022. It has eight airbags and that does include the newer front centre airbag.

There are ISOFIX child seat mounts on the rear outboard seats and three top tethers, but two seats will fit best. And while there will be room for a 0-4 rearward facing child seat, it will encroach on front passenger comfort.

As with all Mercedes-AMG models, the GLB35 comes with a five-year/unlimited-kilometre warranty, which currently sets the standard for the premium market. It also comes with five years of roadside assistance.

The GLB35’s service intervals are long, at every 12 months or 25,000km (whichever comes first). Better yet, it’s available with a three-year/75,000km capped-price servicing plan, but it costs $2750, with the third visit alone incurring a $1300 charge.

The ongoing costs are great on the Niro. It comes with Kia’s ‘better-than-average-for-the-market’ seven-year/150,000km warranty, which also covers the battery.

You get a seven-year capped-price servicing plan and services average $250 per year, which is good.

Servicing intervals are more in line with a petrol car at every 12 months or 15,000km. It’s usual to see those intervals doubled on an EV but it’s still reasonable.