Kia Rio vs Mercedes-Benz A-Class

What's the difference?

The Rio S Manual is a fun-to-drive little car with a big practicality and multimedia offering in a segment rapidly heading towards extinction.

While some elements of the drive experience are reminiscent of budget cars from 10-20 years ago, Kia makes up for it by wrapping the Rio in a contemporary looking and feeling package, ready for the buyer who needs no frills and demands no nonsense. Until the manual transmission goes the way of the dodo, there is almost no better option.

The new AMG C 43 may lack the drama and excitement we’ve come to expect from the German performance brand, but that doesn’t mean it’s a bad car. Yes, it could be more extroverted and the ride could be improved, but this is still a sharp-looking sports sedan with loads of punch.

This is a car that speaks to its times, with ever-stricter emissions regulations making it harder and harder for car companies to produce loud, wild and charismatic cars. So Mercedes-AMG has worked within those boundaries and come up with a car that retains at least some of those core elements that has made the brand so desirable over the years.

Note: CarsGuide attended this event as a guest of the manufacturer, with accommodation and meals provided.

While notable equipment is missing, the Rio reclaims lost ground with the way it looks, and to a degree, the way it feels.

Ever since this new generation hatch launched, I’ve thought it brings a slick modern design to the city-car space, and even in its most rudimentary form as-tested (our car even came in the most basic ‘Clear White’ paint) it’s a great looking little hatch.

Sure, it doesn’t have the romance factor of the Fiat 500, nor the more delicate curvature of the much more expensive new-generation Toyota Yaris, but it certainly has a more refined visage than, say, the MG3 whilst feeling a bit more grown-up than the Suzuki Swift.

Solid, squared-off lines give this car a sporty pose, and its frowny-face and blocky rear round out a stout city-car persona, and I especially like the way even this most basic trim is adorned with contrast pieces, a spoiler above the boot lid, and body-coloured door handles and mirrors.

Sure, the 15-inch steelies dress it down a bit, but on the Rio these leave the impression of financial prudence rather than cost-cutting.

Inside is basic but tidy. The overall look maintains a hint of sportiness, with an appealing symmetrical finish to the dash.

There’s no question the Rio is a budget model when it comes to the touch though, with everything either a soft polyurethane or a nasty hard plastic, so while it all might look neat it’s far from the most comfortable place to be for long periods of time.

The basic dot-matrix multifunction display, chunky plastic air-conditioning controls, and polyurethane items from the wheel to the handbrake and shifter are reminders of a bygone era, but the overall aesthetic of the driver’s space is pleasing.

Mercedes has created something of a problem for itself with its decision to introduce AMG styling packages for the majority of its range, including the C-Class.

It means the C 43 has to walk a fine line between looking like a unique AMG model, rather than just a C300 with a bodykit and not out-doing the C63.

To that end it has AMG’s now familiar grille with vertical bars, the unique and complex-looking 20-inch alloy rims and a small lip spoiler on the boot. But otherwise it is surprisingly understated for an AMG, lacking the more obvious and muscular stance of previous AMG offerings.

Inside, there’s a similar theme, with the typical Mercedes-Benz luxury appointments but with a sportier, AMG twist. The steering wheel is chunky and comes with AMG branding, metallic shift paddles and a pair of rotary dials/buttons that allow you to alter the various drive modes and settings.

The one on the right allows you to switch between the pre-set Comfort, Sport, Sport+ and Individual modes, while the one on the left can scroll between the various individual aspects to tailor the settings to the conditions.

In typical modern fashion the design is tech-laden, with a digital display for the instrument panel (that can be switched between various graphics) and a large, tablet-style central multimedia touchscreen that controls the majority of the car’s non-driving functions.

I'd argue the key reason to buy the Rio at this end of the market is that it has the most space and largest cabin relative to its rivals, bar maybe the Suzuki Baleno.

All-round practicality is great, with front passengers scoring a low, sporty seating position with a high roof, and so much width in the cabin it almost feels like the Rio belongs in the next segment up.

Storage options up front include a large bottle holder and bin in each of the doors, dual cupholders next to the handbrake up front, and a large storage tray underneath the climate unit. Unlike the Yaris or Mazda2, the Rio features a small armrest console box, which gives a small lift to the ambiance of the cabin.

Back seat passengers are treated to great space for this segment, which feels nice and open courtesy of the large rear windows. At 182cm tall, I have airspace for my knees behind my own driving position, as well as relatively healthy headroom and ample width, which is again more like a car in the next segment up.

Rear passengers don’t get adjustable air vents, but there is a single USB port, a single pocket on the back of the passenger seat, and small bottle holders in each of the doors.

Perhaps the Rio’s biggest drawcard is its boot capacity, which at 325 litres is one of the largest in the city car class. Unlike the Yaris, Mazda2, or Suzuki Swift, the Rio will actually accept the CarsGuide three-piece luggage set with the rear seats up, although the rear view was obscured by the medium case.

Thanks to the boxy roofline, the Rio offers a cavernous 980L with the rear seats folded down, and despite its abundance of room, maintains a space saver spare wheel under the floor.

The new C-Class has grown slightly in size compared to the model it replaces, most notably with a 26mm increase in the wheelbase which you can feel in the cabin.

The front seat space is good, with excellent adjustability for the power-adjustable seats and steering column. I had no trouble finding my ideal seating position which makes for a more enjoyable and uncompromised driving experience.

Rear space is a bit tighter (which is typical for this segment/size of vehicle), but thankfully the standard seats do have very deep sculpting in the backs which allow for more knee space and foot room.

However, at approximately 180cm (six-foot), I wouldn’t like to sit behind my seating position for long periods as my knees were touching the seat back, and headroom is compromised with the panoramic glass roof.

In terms of small item storage there’s a lidded console box in between the front seats as well as a pair of cupholders and a small tray where you can place your mobile phone.

It’s worth noting, though, that early examples of the C 43 in Australia do not have a wireless smartphone charging pad, with that reportedly being introduced from February production.

While that’s good news, it’s not really competitive in this day and age to offer a car costing six-figures without such technology.

There’s also only a single USB-C power outlet in the front, which is another disappointment, but there is a pair in the back.

Mercedes does win some points back for a respectable 455-litre boot, which has a nice wide load opening that will make packing luggage easier.

We’ll get to the major change under the bonnet shortly, but another significant alteration for this latest C 43 is the price.

It now starts at $134,900 (plus on-road costs), which pushes it well above its market rivals, the BMW M340i xDrive and Audi S4, which start at $104,900 and $106,200, respectively.

However, Mercedes has added more technology under the bonnet and loaded the C 43 up with standard equipment, including its '4Matic' all-wheel drive system, adaptive damping, rear-wheel steering and 20-inch alloy wheels.

In terms of creature comforts, the C 43 is well-appointed, with leather upholstery, a head-up display, augmented reality navigation, a panoramic sliding sunroof, and a Burmester 3D surround sound system.

There are two option packages for the C 43. The 'Digital Light Package' costs $2400 and adds Multibeam LED headlights with 'Ultra Range' highbeam, 'Adaptive Highbeam Assist Plus' as well as active light function and cornering light function.

The 'Performance Ergonomics Package' includes AMG Performance front seats, an AMG Performance steering wheel in Nappa leather and microfibre and the 'AMG Track Pace' system for an additional $5200.

The Rio is beginning to fall behind here with an antiquated 1.4-litre four-cylinder non-turbo petrol engine. Peak outputs aren’t far off where they should be for this segment, with 74kW of power and 133Nm of torque, although they arrive at the most distant end of the rpm range (6000rpm and 4000rpm respectively) so you need to rev it.

It can be clumsy to extract this power, too, with the engine paired in this circumstance to a six-speed manual which leaves a lot to be desired in terms of action and clutch feel.

While the abundance of ratios can be beneficial for fuel consumption, it’s clear this car was designed to be paired with the more modern three-cylinder turbocharged engine only available on the top GT-Line trim.

The biggest talking point about this new car is the engine, with AMG downsizing from the old C 43’s six-cylinder to a 2.0-litre four-cylinder turbocharged petrol engine.

But it’s not just any turbocharged four-pot, because it is fitted with technology that Mercedes claims has been inspired directly from its Formula One team.

While the F1 team engine facility is based in England, this engine was designed and developed by the Mercedes-AMG team at its Affalterbach headquarters, but the concept of the electric turbocharger reportedly comes from the engine that powered Lewis Hamilton to multiple world championships.

The electric exhaust gas turbocharger - to give it its official name - uses a small electric motor on the turbocharger shaft to spin up the blades without having to wait for any exhaust gases to pass through it first.

To power the electric turbo the C 43 is equipped with a mild-hybrid 48-volt electrical system.

Mercedes claims this means reduced lag and improved throttle response for a sportier driving experience. 

It also helps make this small engine produce big amounts of performance, with AMG extracting 300kW of power and 500Nm of torque from this 2.0-litre, which is more power than the previous six-cylinder C 43 managed.

The engine is paired to a nine-speed multi-clutch transmission, which isn’t a dual-clutch with a pair of clutches operating on every second gear ratio, but instead uses a “wet start-off clutch” for better take-offs and smoother shifting on the move (at least in theory).

Power is sent to the road via all four wheels thanks to Mercedes’ 4Matic all-wheel drive system.

The Rio S manual has an official combined cycle fuel consumption rating of 5.6L/100km, which is about right for a light car with a small engine.

On test, covering largely urban kilometres, I saw a higher but not unreasonable 7.4L/100km. Still, this number isn’t too far off what some larger cars with 2.0-litre engines are capable of.

Rios with this engine accept entry-level 91RON unleaded fuel, and have 45-litre fuel tanks. They are only compliant with Euro 5 emissions regulations.

Despite the smaller engine you can hardly call the C 43 miserly, with a claimed combined urban/highway cycle rating of 9.1-litres per 100km. That’s only a 0.2L/100km improvement over the old six-cylinder.

On test, which included a return trip from Sydney to Bathurst via motorways and some dynamic back road driving, we saw a return of 11.8L/100km on the car's onboard computer.

While hardly hybrid-worrying, it’s impressive to think that driven modestly, such a potent engine can return a single-digit fuel figure.

A six-speed manual with a tiny non-turbo engine is an absolute oddity in today’s new car market, but as a result of its rudimentary approach, there’s something refreshingly honest about the Rio S.

The engine requires a wringing to extract the desired result, and a lot of action on the gears, as six speeds proves to be quite a few to work your way through before you achieve cruising speed.

As so much interaction is required with the transmission, I wish it was tighter when it comes to the clutch which feels a bit doughy at the best of times.

The Rio is very organic, though, with next to no electrical assistance for any of its interaction points offering the driver a high level of control.

The steering is direct, but as a result of a cheaper rack (with less teeth compared to this car’s Stonic relation), it feels simple and brittle when it comes to feedback.

The same criticism can be levelled at the suspension, which errs on the side of firm. This attribute combines with the low seating position to make even this most basic Rio an absolute hoot in the corners.

But it can be a little crashy over every-day potholes and corrugations, despite the abundant amount of rubber cladding the 15-inch steel wheels.

Visibility is superb out of this little car’s big windows, making you feel in control of your surroundings (necessary in the multi-lane confines and tight parking conditions of a city), and ergonomics in the cabin are absolutely on-point with the large touchscreen elements easy to reach and the instruments taking a basic no-nonsense form.

While noise levels are okay at urban speeds, they pick up above 80km/h, making the Rio more unpleasant to drive over long distances than, say, the more upmarket-feeling Yaris.

The Rio does find its place in this price bracket as a fun-to-drive, but predictably rudimentary experience, for the niche audience of drivers seeking an entry-level car who are still able to shift gears themselves.

Let’s start with the good news. The new Mercedes-AMG C 43 is a quick car. The engine may be small in size but the electric turbocharger does its thing and provides plenty of punch.

You can get a performance boost, too, thanks to the belt-driven starter generator, which acts as a mild hybrid and gives you a surge of 10kW for a brief period if you need a sudden burst of extra speed.

The chassis is well-sorted, too, at least from a dynamic point-of-view. The rear-wheel steering can provide up to 2.5 degrees of turning, which improves handling at speed and manoeuvrability when parking.

However, there are some less-impressive elements to the C 43, too. The obvious one is the drama, or rather the lack thereof.

As I said at the beginning, the C 43 has never been as wild or raucous as the V8-powered C 63, but when you buy an AMG there’s a rightful expectation that it will provide some thrills.

The C 43 simply doesn’t have that character about it. Yes, it’s fast, but it produces that speed with efficiency rather than excitement.

And it’s not an engine size problem, because even the 2.0-litre four-cylinder A 35 and CLA 35 offer more ‘wow factor’ than the C 43.

Yes, the engine makes noise under acceleration (and it can be altered between discreet and sporty) but even at its best it sounds muted and lacks the evocative tone of a V8 or six-cylinder engine. 

Another disappointment is the transmission calibration, with the gearbox awkwardly shifting out of first gear on multiple occasions during our test drive.

In the taller gears it felt smooth enough cruising along, but given its low speed shifts we’d like to spend more time in the urban environment before passing final judgement. 

The other notable element of the driving experience we struggled with was the ride quality. While fine on the smoother motorways, our test drive included time on some patchy country back roads and the C 43, even in the ‘Comfort’ suspension setting, was simply too firm.

Riding on low profile tyres, the adaptive dampers struggled to isolate the cabin from the imperfections in the road, leading to a fussy ride at times.

Overall the C 43 is a good car, but it feels like there are still some areas where Mercedes could improve it to make it really live up to the AMG badge.

The C43 gets a comprehensive list of safety equipment that leaves little out. Obviously there are the usual passive safety items, like 10 airbags, including dual-front combined pelvic/thorax airbags and a front centre bag that drops between the front seat passengers to minimise the chances of a head clash.

Also included as standard is autonomous emergency braking front and rear (covering speeds between 7.0-200km/h), adaptive cruise control with active stop/go, a 360-degree parking camera, 'Active Parking Assist', 'Active Lane Keeping Assist', 'Blind Spot Assist' and, of course, anti-lock brakes with 'Brake Assist' and 'Adaptive Brakes' with Hold function and electronic stability control.

Also included are dusk-sensing LED lights, rain-sensing wipers and run-flat tyres with tyre pressure warning.

The C43 also comes equipped with Mercedes’ 'Driving Assistance Package Plus', which adds even more safety gear. This includes 'Active Blind Spot Assist', 'Active Brake Assist with Cross-Traffic Function', 'Active Emergency Stop Assist', 'Active Lane Change Assist', 'Active Lane Keeping Assist', 'Active Steering Assist', and 'Active Stop-and-Go Assist'.

While the C43 hasn’t been specifically crash-tested, the latest C-Class was rated by ANCAP with a five-star score for all models except the upcoming C 63 S E Performance.

The Rio again gets the edge on its budget competition with a lengthy seven-year, unlimited kilometre warranty. In this space it only butts heads with the MG3, which offers a matching promise.

Roadside assist is included for up to eight years if you continue to service with Kia, and there's also a capped price service program for the duration of the warranty, covering up to 105,000km.

The Rio needs to be serviced once every 12 months or 15,000km, and prices range from $269 and $608 per visit, for an annual average of $409.40.

Not the cheapest servicing schedule we’ve seen, particularly when compared with the likes of Toyota.

The C 43 is covered by Mercedes’ five-year, unlimited kilometre warranty, which has become the new standard for the luxury car market.

Service intervals for the car are at 12 months/25,000km, which is on par with industry standard.

Mercedes-Benz Australia will offer a service plan for the C 43, prices were yet to be confirmed at the time of publication but the company has indicated it will be similar to the C300. 

That means $550 for year one, $900 for year two, the third service costs $1000 and the fourth year service costs $2450 - for a total of $4900 for the first four years of ownership.