Mercedes-Benz CLA-Class vs Subaru WRX

What's the difference?

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.

Possibly one of the most perfect performance cars you can drive daily for the price. Dynamic and fun to drive, but also easy to live with thanks to the drive modes for extra comfort, the high ground clearance and the practicality that comes with four doors, lots of storage and a big boot.

The tS Spec B is the priciest WRX in the range, but compared to rivals it's also great value. A car I would buy with my own money for sure.

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.

The WRX tS Spec B stands out from its siblings with 19-inch matte-grey alloy wheels with gold Brembo brakes and if you don’t notice any of that, then surely you won’t miss the gigantic rear wing planted on the boot lid.

The air scoop jutting out of the bonnet like a pizza oven is standard across the WRX range and it looks tough. There’s the rear diffuser which also looks beefy but also a bit plasticky, and the quad exhaust, that’s nice, and so is the note which wafts out of them at idle.

The tS Spec B’s Recaro sports seats are also in other tS grades – they do look and feel good, and offer outstanding comfort and support. 

The rest of the cabin is much the same as other WRX grades with a large portrait-style screen, physical buttons for climate control, and yes, that is a traditional, mechanical handbrake you can see in images.

This is a sporty-looking although slightly outdated cabin compared with more modern rivals.

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.

What’s so appealing about the WRX is that despite it being a performance car, it’s based on a regular 'small' sedan and with that comes all the practicality of a four-door, five-seater with a big 411-litre boot.

Space inside is excellent with plenty of room up front, while rear legroom is ample enough for me, at 189cm tall, to sit behind my driving position with plenty of headroom, too.

That all said the Recaro seats up front are on the snug side and I know they’re supposed to be, but I’m just saying they might not suit everybody – and by that I mean everybody.

Those with long legs might also find they have to adjust their driving position when letting out the clutch.

Big door pockets throughout, four cupholders, and hidey-holes for items throughout make for good cabin storage.

There are four USB ports and one 12V outlet, but no wireless phone charging to be found.

The WRX tS Spec B sits at the top of its range and lists for $61,490 plus on-road costs, making it expensive for the model compared to say the entry-grade WRX which is only $48,190 and pairs the same engine with the same gearbox.

Still, it comes with some unique features which makes this grade stand out from the other lower rungs in the WRX hierarchy.

The tS Spec B comes standard with 19-inch alloy wheels, six-piston front and two-piston rear high-performance Brembo brakes with ventilated and drilled discs, an enormous rear spoiler, STI Performance Mufflers at no extra cost, Recaro sports bucket seats in the front, a leather STI steering wheel and a 12.3-inch instrument cluster.

Also unique to the grade are drive modes which allow the suspension, engine, and steering to be customised for comfort or performance.

Standard on the ts Spec B, too, is equipment you'll find on lower grades in the WRX range, including LED headlights and daytime running lights, privacy glass, dual-zone climate control, an 11.6-inch touchscreen, a 10-speaker Harman Kardon sound system, wireless Apple CarPlay and Android Auto, proximity locking and push-button start.

Rivals to the WRX tS Spec B include the Hyundai i30 N Sedan that's $10K cheaper, and the Honda Civic Type R and Volkswagen Golf R which are both at least $10K more. The value for money in the tS Spec B is great compared to competitors, but there’s even better value to be found in the lower-grade WRXs.

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.

Who doesn’t love the sound of a boxer engine? Well, probably your neighbours if you own a WRX. And while the tS Spec B doesn’t have any more power than any of the other WRXs – with it sharing the same 2.4-litre turbo-petrol four-cylinder boxer engine as the rest of the line-up – the 202kW and 350Nm feel like the perfect amount of power and torque for this package.

It’s probably been about six months since I last drove a car with a manual gearbox, and that shows how rare they’re becoming when you’re testing a new car nearly every week.

The six-speed manual in the tS Spec B has satisfying clunky shifts and a heavy-feeling clutch pedal, but it all plays along perfectly with this engine, sending the drive to all four wheels.

If you’re looking for a version of the tS Spec B with an automatic transmission you’ll be searching forever because this grade only comes with a manual gearbox. There are WRXs with autos – well, a CVT – the entry grade, the RS and the tS.

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.

The WRX tS Spec B manual really likes its fuel – it’s a hungry beastie and everybody who’s about to get into the WRX life should be aware that, like most petrol performance cars, it’s not super fuel efficient.

Subaru is beautifully honest with its fuel consumption figures, which have the the WRX tS Spec B using 10.4L/100km in combined driving and 14.2L/100km in urban environment, which is so close to what we recorded - ours was 14.1/100km after mainly urban driving. You'll also have to feed it 95 RON.

The fuel tank is a healthy 63 litres in volume and that should give you a range of 606km – in theory. Do not test this theoretical range somewhere remote, okay?

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.

This may sound strange, but a few months ago I was squished into the tiny cockpit of a 2025 Chevrolet Corvette Z06 sitting at the traffic lights wishing I was in the 2020 Subaru WRX STI beside me. And having driven so many supercars and muscle cars in the past, many costing hundreds of thousands of dollars, I still see the WRX as being such a perfect daily driver performance car.

Sure, it doesn't have Porsche 911 dynamics or the straight-line acceleration of many electric cars, but it's the way the way this boxer engine interacts so beautifully the six-speed manual gearbox, combined with sticky all-wheel drive, a wonderful balance and such direct steering that make the WRX ts Spec B feel exactly right.

The tS Spec B is very much at home in the suburbs dotted with roundabouts and obstacles like speed bumps, but they all become part of the fun of driving this car in the same way that when you let it loose and open road it performs happily and so well, too.

The suspension does feel firm, but part of the big news of this tS Spec B is that it now has a drive mode function and this allow you to adjust the suspension, the steering and the throttle response to either sporty or comfort settings. This just makes this car an even more agreeable thing to live with daily.

The WRX hasn’t been given an ANCAP rating and up until only last year manual versions weren’t equipped with safety tech such as autonomous emergency braking.

The WRX tS Spec B manual has AEB, blind-spot warning, rear cross-traffic alert, adaptive cruise control, lane departure warning and high-beam assist. 

It’s interesting but not particularly good that manual versions of the WRX don’t have parking sensors. I  don't need to tell you that parking sensors on cars in the city are so helpful for squeezing into tight spots without nudging the vehicle or railing behind you.

A space-saver spare wheel instead of a full-sized spare isn’t ideal either in Australia where dirt and gravel roads beckon the WRX.

For child seats there are three top-tether anchor points and two ISOFIX mounts across the second row.

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.

The WRX tS Spec B is covered by Subaru’s five-year/unlimited-kilometre warranty, which while the standard for the mainstream segment, is behind the seven-plus terms we're now seeing from a lot of Chinese and Japanese car brands.

Servicing is recommended every 15,000km/12 months and can be expensive compared to other brands, with the five years of capped price servicing coming to $2692.