Mercedes-Benz CLA-Class vs Audi A5

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.

Predictably stylish, predictably competent, predictably comfortable. In fact, that predictability is among its only downsides. In short, the updated A5 might not move the needle all that much, but it didn't need much moving in the first place. 

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.

It's gorgeous, the A5. There's simply no disputing it. It's elegant, sophisticated, and above all, restrained. There's no look-at-me chintz here, just clean lines, sharp creases and a shapely figure.

Like its A4 sibling, the A5 has been tickled at the front, with a new-look grille, along with a new headlight cluster with redesigned DRLs, and Matrix LED headlights. 

The four sharp bonnet creases that fan out from the grille lend the A5 a sense of speed, even when stationary, and we love the way the 19-inch alloys fill the wheel arches. It looks polished, premium and athletic. 

Inside, Audi's interior treatment is on-point, from the figure-hugging leather seats to the material choices that span the dash. The big news in the cabin is the inclusion of Audi's new 10.1-inch touchscreen perched above the dash, which isn't just easier to use (in my opinion, at least), but also removes the traditional controls from the centre console. 

It means Audi's already fuss-free cabin is even less cluttered, and it's definitely a change for the better. 

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.

It very much depends on the model you've opted for, with the Coupe compromising backseat space for exterior style. 

The Sportback is easily the most practical of the trio, what with its four doors, comfortable backseat and dimensions that stretch 4757mm in length, 1843mm in width and 1386mm in height, and its 480 litres of boot space.

The Coupe, then, is a two-door design, stretching 4697mm x 1846mm x 1371mm, with 450 litres of luggage space at the rear. It's long, the Coupe, but most of that space is absorbed by the front half of the cabin, wth the backseat reserved for kids. 

Finally, the Cabriolet (which we're yet to test) stretches 4697mm x 1846mm x 1384mm, and will deliver the lowest luggage capacity of the lot, at 375 litres.

Elsewhere, though, the A5 range delivers two cupholders up front, with another two in the centre armrest that can deploy to divide the rear seat. Rear-seat riders also get air vents with their own temp controls, USB charge points (joining the two up front) and bottle holders in the doors. 

For parents, you'll find a pair of ISOFIX attachment points in the backseat, too. 

The cheapest way into an A5 remains the Sportback or Coupe body styles, which will set you back $71,900 with the 40 TFSI engine choice. You can upgrade to the 45 TFSI quattro engine, but doing so will also up the entry point to $79,900. The Audi A5 Cabriolet sits atop the pile, costing $85,400 for the 40 TFSI, and $93,400 for the 45 TFSI quattro.

Happily, all A5s get the S line style treatment, gifting each a sportier look, with a new-look grille and venting adding to the performance-spec style up front. 

You also get 19-inch alloys, Audi drive select with five drive modes, three-zone climate (and neck-level heating in the Cabriolet), leather trim, matrix LED headlights, as well as tech-heavy interior highlighted by a new 10.1-inch touchscreen in the centre of the dash that controls the cars key audio, navigation and driving settings. 

Speaking of the Cabriolet, the three-layer acoustic roof opens in just 15 seconds at speeds of up to 50km/h, with a wind deflector also deployed to help with cabin ambience.

Audi's very cool Virtual Cockpit (a 12.3-inch digital display that replaces the traditional driver's binnacle) is also standard, as is Apple CarPlay and Android Auto. Audi says the new model offers 10x the computing power of the outgoing model, owing mostly to connected car features including live traffic, weather reports and fuel pricing, as well as the ability to remote unlock or lock you car from your phone, or pre-plan destinations and send them to the vehicle's nav.

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.

Two choices here, the slightly tongue-twisting 40 TFSI and  and 45 TFSI quattro, both of which make use of a 2.0-litre turbo engine tuned for different outputs. 

The 40 will serve up 140kW and 320Nm, and pairs with a seven-speed S tronic automatic that shuffles that power to the front wheels. Audi reckons you'll see 100km/h in as little as 7.3 seconds.

The 45, on the other hand, will give you 183kW and 370Nm, pairing with the same auto gearbox, but this time sending power to all four wheels thanks to the quattro system. The 100km/h sprint drops to 5.8 seconds at its fastest.

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.

Audi reckons the 40 TFSI engine will return 6.5L/100km on the combined cycle, and emit 148g/km of C02. The bigger engine increases fuel use to 7.1L/100km, but lowers the C02 output to 163g/km. Both those fuel numbers are taken from the Sportback.

Both engines also get a new 12V mild-hybrid system said to drop fuel use by up to 0.3L/100km.

Fun tank capacity is either 54 litres or 58 litres, depending on the model.

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.

You'd describe the A5's drive experience as evolved, rather than revolutionary, but to be honest, in a vehicle this competent, that's no small thing. 

The hybrid tech is unnoticeable, and so the A5 delivers an on-the-road feel that isn't far away at all from the car it replaces. None are truly fire-breathing, but it feels comfortable and sophisticated, the outside world largely banished from the interior (though the firm-ish ride can send road imperfections into the cabin).

Audi has done a stellar job of making the A5 feel connected to the road below it, and the world around it, without dialling down the comfort factor. The steering, light in its normal setting but firming up as you cycle through the drive modes, is direct, but not twitchy, the ride is firm, but not uncomfortable, the engine (at least, the 45 TFSI we drove on launch) is capable without being ridiculous. 

The end result is a predictably competent drive experience, with the A5 delivering in the areas it should, largely before you even notice. 

The only downside to all of that, though, is that the experience is so predictable, that there are few surprises, positive or negative, thrown in. It can leave you feeling slightly disconnected from the experience, rather than truly engaged.

Now, a disclaimer, we spent limited time in the A5 on launch, so we'll wait until we get it in the CarsGuide garage before making a final verdict. But I'd be surprised if we liked it any less over a longer period.

Standard safety kit includes eight airbags, parking sensors front and rear, a 360-degree parking camera, adaptive cruise control with stop-and-go, rear cross-traffic alert, exit warning, and lane keep assist and lane change assist, along with a bevy of airbags, with the A5 range still wearing a five-star ANCAP safety rating.

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.

All Audi's are covered by a three-year, unlimited-kilometre warranty, with servicing required every 12 months or 15,000km.

You can pre-pay your service costs for three or five years, which will set you back $1800 for three years or $2820 for five years.