Mazda CX-3 vs Mercedes-Benz C350

What's the difference?

It’s easy to see why the Mazda CX-3 remains such a favourite with small SUV buyers. The Evolve grade tested is dynamically capable, space efficient and well equipped for the money. That said, although I don’t like being ageist, as it starts to creep up on a decade on sale, the market leader is giving ground to the competition in key areas including design, fuel efficiency and refinement. It’s time for a new-generation model, but in the age of electrification, will there be one? In the meantime, this evergreen favourite remains a solid urban SUV option.

Baby steps these might be, but they're important ones for Benz. The new in-cabin tech and clever engine in the cheapest models only strengthen the C-Class proposition, without taking anything away from the drive experience, cabin ambiance and utterly sublime ride.

In short, Mercedes' reign at the top of the premium mid-size segment is unlikely to be toppled anytime soon.

You’re not going to mistake the current CX-3 for anything other than a Mazda, which speaks to the consistency of the brand’s design approach.

Tightly wrapped and neatly detailed the CX-3's exterior has aged well, and thanks to cosmetic tweaks over time it’s still looking clean and contemporary. 

The step up from 16-inch alloys on the lower Sport and Pure grades to 18-inch rims on this Evolve also lifts the look to a more mature, premium level.  

The interior is a simple, fuss-free environment, but in a small-SUV world moving rapidly towards slick integrated screens for multimedia and instrumentation, the CX-3 is showing its age.

The 8.0-inch media display stands proud in the centre of the dash, almost like an afterthought, and the instrument cluster, while okay from an ergonomic point of view, is dated by an analogue tachometer in the centre and LCD-style read-outs either side.

And although it’s always a subjective call, I’m guessing the Evolve’s white and tan interior trim combination won’t be to everyone’s liking, from an aesthetic or practicality point-of-view.

That said, the interior surfaces across the dash, doors and centre console flow into one another nicely, and brushed metal look highlights around key controls and vents enhance the quality feel.

Speaking of which, physical dials and knobs for adjustment of the ventilation system and audio volume is welcome. Maybe old-school is the best school?

However… the multimedia screen can only be accessed by a rotary dial in the front centre console once the car is mobile (it works as a touchscreen when you’re stationary).

Keenly aware there are various opinions on this set-up when it comes to safety. Touchscreens, by definition, take your eyes off the road ahead, so on one hand it makes sense to transfer control to the rotary dial.

But when you’re using a sequential app like Spotify, it can take a hell of a lot of twirls of that controller to get to where you want to go.

Soon you’re grinding your teeth in frustration which upsets concentration and your eyes are well-and-truly off the road, anyway. 

For what it’s worth, I’d prefer the relative ease of a quick press on the screen rather than having to go ‘around the horn’ to hit your favourite track or podcast.

Perhaps not quite blink and you’ll miss them, but we're not talking radical changes either, folks. Benz tells us as much as 50 per cent of the C-Class components are new or changed, but it has clearly subscribed to the 'if it ain’t broke' philosophy in the design department.

Yes, there are new bumpers front and rear, new LED light configurations and new colours and wheel designs, but we’re not talking huge changes outside. Still, the C-Class cuts a fine figure on the road, what with its intricate alloys, bonnet-defining grille and simple, understated body contours. Australia will take every available body style, too, including sedan, coupe, cabriolet and - our personal favourite - the 'estate' station wagon.

The C 43 AMG now gets the twin-blade grille design used on the V8-powered models, as well as a two pairs of rounded exhaust tips at the rear.

Inside, though, the changes are more substantial. For one, the new-generation Mercedes Touch Control steering wheel arrives as standard, as does a new and very effective 12.3-inch screen that replaces the traditional dials in the instrument cluster (standard on every model). 

The cabin remains a peaceful and premium-feeling space, with a fine use of materials (including quilted leather on the door panels, polished silver or faux-wood for the centre console and leather for the steering wheel), and Benz deserves credit for ensuring that sense of luxury extends to backseat riders. 

At just under 4.3m long, less than 1.8m wide and a little over 1.5m tall the CX-3’s footprint is squarely city-sized, and no surprise it shares the Mazda2’s 2570mm wheelbase because it’s underpinned by the same platform as the small hatch.

But there’s more than enough breathing room up front and storage options are creative.

Rather than the ubiquitous single storage box between the front seats the CX-3 offers up an adjustable multi-compartment arrangement, with cupholders and bottle retainers ready to flick into position in multiple locations. 

It’s still covered with a padded lid which doubles as an armrest, and there’s also a generous glove box and bins in the doors with space for large bottles, even an overhead drop-down glasses holder.

Move to the back and there’s a surprising amount of head, leg and shoulder room for an SUV of this size. Sure, it’s no limo, but sitting behind the driver’s seat set to my 183cm position, I was pretty comfortable.

Best for two full-size adults in the rear, although a third can squeeze in for short, relatively uncomfortable journeys. Three up to mid-teenage kids will be fine.  

Rear storage includes bottle shaped cavities in the doors, a map pocket on the back of the front passenger seat only (a weird Mazda habit) and dual pop-out cupholders in the fold-down centre armrest.

No adjustable ventilation outlets in the rear, but in a car this compact, their absence isn’t as big an issue as it might be elsewhere.

For power and connectivity, there are two USB-A sockets in the front (one media, one power-only) as well an SD card slot, an ‘aux in’ jack and a 12V outlet. No power options in the rear, which won’t play well with the kids.

With the back seat upright, boot capacity is an okay 264 litres. Enough to accommodate either the largest 124L or the smaller 95L and 36L suitcases from out three-piece set. But not all of them together.

With a bit of not so gentle persuasion, the large CarsGuide pram just squeaked in, but lower the 60/40 split-folding rear backrest and available space expands to 1174L.

Tie-down anchors to help secure loose loads is a plus and a speed-limited space-saver spare sits under the boot floor.

And if you need to hook up a small boat or other lightweight trailer, the CX-3 Evolve is rated to 1200kg (braked) and 640kg (unbraked).

It all depends, really. All C-Class variants sit on the same 2840mm wheelbase, and stretch 1810mm in width. The sedan, coupe and cabriolet versions measure 4686mm in length, while the Estate’s bigger cargo area increases its size to 4702mm.

Predictably, then, the estate offers the most useable (VDA) boot space, with 490 litres with the rear seats in place, swelling to 1510 litres with the rear seats folded flat. The sedan version is next on the cargo-carrying list, with 455 litres, followed by the 380 litres of the coupe and 285 litres of the cabriolet.

We spent our entire time in the four-door sedan models, and we can report a spacious and comfortable space for driver and passenger (you could play ping pong on the wide centre console) with two cupholders and room in each of the front doors for bottles. There’s all the USB and power connections you might need (most housed in a deep storage bin that separates the front seats) and the more expensive models offer wireless charging for compatible phones, too.

Climb into the sedan’s back seat, and you’ll find impressive legroom (behind my own 176cm driving position), but headroom - especially in sunroof-equipped cars - feels a little tighter. The rear seat is actually wide enough to fit three adults at a pinch, but the tall and bulky tunnel absolutely obliterates leg room for the middle-seat rider.

There are two cupholders in the pulldown divider that separates the backseat, as well two ISOFIX attachment points. Rear occupants also get there own air vents, as well as a 12-volt power source.

Mercedes is so far keeping mum on the details, ahead of the updated car’s arrival in August, but you can expect to see prices climb a little from their current levels ($61,900 - $100,611, and $120,642 for the C 43 cabriolet).

The C200 will retain 18-inch alloy wheels, artificial leather (and electric in the front) seats, nav, ambient interior lighting and keyless entry and push-button start, but critically adds a new 12.3-inch screen in the driver’s binnacle that replaces the traditional dials. It joins a landscape-oriented 10.25-inch centre screen - both now standard across the C-Class range - which propels the cabin into a clean and modern-feeling future.

The C220d and C300 features list will likely change little, but all get Mercedes’ new 'Touch Control' steering wheel, as well as new LED head and tail-lights, while the C 43 AMG 4Matic gets the best of Merc's autonomous driving technology. 

Expect more information to arrive around July.  The C 63 AMG is also due for updating, with a new model scheduled to arrive around December. 

The CX-3 is powered by a 2.0-litre, four-cylinder petrol engine sending drive to the front wheels via a six-speed auto transmission.

The all-alloy unit features direct-injection and variable valve timing to produce 110kW at 6000rpm and 195Nm at 2800rpm.

It’s here where the C-Class is at its most updated, serving up a new turbocharged 1.5-litre hybrid engine in the entry-level C200. Alone, it’s good for 135kW/280Nm, but it’s combined with a clever 48-volt system that adds up to 11kW of bonus power low in the rev range, happily plugging the power void usually left by turbo lag when taking off, or if you plant your foot when overtaking.

The C300 is powered by a more conventional 2.0-litre, four-cylinder good for 190kW/370Nm, while the sole diesel (in the C220d) is a four-cylinder unit that produces 143kW/400Nm. All are paired with a nine-speed automatic transmission.

The C 43 4Matic's engine remains a fabulous thing, only now tweaked for a little bit more power. It's good for 287kW/520Nm, and is paired with a nine-speed transmission that sends the power to all four wheels, albeit with a bias toward the rear tyres.

Mazda’s official fuel economy number for the combined (ADR 81/02 - urban, extra-urban) cycle is 6.3L/100km, the 2.0-litre four-cylinder emitting 143g/km of CO2 in the process.

That’s an impressively small emissions figure for a 2.0L petrol engine, more in line with smaller-capacity engines.

Stop-start is standard and over a week of city, suburban, and some freeway running, we averaged 7.4L/100km (at the pump), while the car’s on-board computer indicated 7.1L/100km for the same period.

Minimum fuel requirement is 91 RON ‘standard’ unleaded (or E10) and you’ll need 48 litres of it to fill the tank.

Using the official number, that translates to a driving range of around 760km, which drops to roughly 650km using our real-world figure.

Let’s start with the C200, where the addition of the clever hybrid system has helped drop fuel use to a claimed 6.0-6.3 litres per hundred kilometres. The old car delivered 6.5 per hundred, but was slightly quicker from 0-100km/h (7.2sec- 7.7sec). 

The C300 will sip a claimed 6.5-6.9L/100km on the same cycle, while the diesel requires a miserly 4.7 litres. The C 43 is the thirstiest, of course, needing 9.1-9.3L/100km on the same cycle. 

The C200 makes do with a 41-litre tank (as does the diesel) while the C300 steps that up to a 66-litre tank. And all those numbers related to the sedan body shape, so expect some slight variations if you’re shopping for a coupe cabriolet or estate.

The CX-3’s compact size makes it easy to steer through tight city and suburban streets. 

It weighs in at just under 1.3 tonnes, which is marginally lighter than most of its key competitors, and acceleration is sprightly with the 0-100km/h covered in less than nine seconds.

Close to 200Nm of pulling power is plenty for a car in this class and unusually for a non-turbo engine, peak torque arrives at a relatively low 2800rpm, so there’s ample mid-range urge.

The downside is the 2.0-litre, four-cylinder engine makes its presence felt inside the cabin, with mechanical noise noticeable even at around-town speeds. Not a conversation stopper by any means, but it’s there.

No complaints with the six-speed auto transmission. It’s smooth and the ratios keep the car in its performance sweet spot nicely. It also shifts into sequential ‘Manual’ mode if your prefer or need to call the shots.

Electric ‘drive-by-wire’ throttle response is smooth, but flick the console-mounted rocker switch to ‘Sport’ and things become more urgent, with the transmission shifting down earlier and holding on to ratios longer.

The steering is evenly weighted for easy parking and road feel is good. Speaking of parking, a 10.6m turning circle is large-ish for such a diminutive SUV, but surprisingly, not out of line for the category.

Suspension is by struts at the front and torsion beam at the rear, and despite the CX-3’s relatively short wheelbase and the Evolve’s bigger 18-inch wheels, ride comfort over typically pock-marked urban roads is surprisingly good. The Toyo Proxes R52A (215/50) tyres are also quiet and reassuringly grippy.

Braking is by generous ventilated discs at the front and solid rotors at the rear, and they’re more than up to the task of calmly washing off speed in this city-sized SUV. 

The front seats proved comfy and supportive on test, although you’ll have to step up to the next Touring grade to score electric adjustment for the drive or lumbar control of any description.

Keen to sample the new hybrid tech in the C200, we made a beeline for the cheapest C-Class. And if you’d told me, even a handful of years ago, that a piddly 1.5-litre engine would be enough to drag the 1555kg Benz around, I’d have labelled you crazier than Donald Trump's Twitter account. 

The C200’s system is a unique hybrid set-up, in the sense that it only delivers extra power in the tiniest of circumstances, but they’re the areas that it really needs it. From a standstill, the electric motor delivers its extra 11kW of oomph at just the right moment need to help get you moving (the same when overtaking) and it does genuinely make a difference. 

It can’t completely overrule the concrete laws of physics, though. Plant your foot on anything that even looks like a hill and you can definitely hear that 1.5-litre engine working hard - interrupting the ambience of the cabin - but keep it in the sweet-spot of the rev range and it’s a quiet, capable-feeling engine that delivers more punch than its size might suggest.

On Germany’s epic autobahns, the needle even sailed past 215km/h without too much encouragement (even if I could have knitted a sweater in time it took to to close the last 10-or-so-kilometres). Is that relevant for Australia? Sadly not, but it does suggest the engine is more capable than we will ever need it to be.

Elsewhere, the not-too-different C-Class rides an absolute dream, smooth-sailing over bumps and road imperfections, and the cabin is serene and comfortable - though there was more wind noise at times than I was expecting.

Downsides? Well, the cheapest C-Class doesn’t feel the most dynamic offering, with the light steering serving up a slight disconnect between the steering wheel and the road below in its most comfortable settings. Switching to Sport improves matters, but if you’re life is mostly city and suburbs, it will matter little.

The nine-speed transmission can behave oddly at times, too; smooth and lightning fast as it climbs the gears, and mostly perfect on the way back down. But I noticed a definite thump occasionally as it shifted down from second to first gear, which stripped a little refinement from the drive experience.

It's more noticeable in the C 43 4Matic AMG, but it's vastly overshadowed by the thick and meaty power delivery from that stonking turbocharged engine. It's a rocket, and while it's not as fast or as loud as its C 63 big brother, I honestly think the tweaked C 43 is all the AMG I'd ever need.

Detailed specifications for Australia are still being finalised for the C-Class, but we don’t think the standard safety equipment will change much.

So expect a comprehensive suite of airbags (including front, front-side, head for the first and second rows and a driver knee bag), joined by the usual kit of traction and braking aids on the C200. Blind-spot assist, tyre-pressure monitoring and AEB - part of the Collision Prevention Assist Plus package - also arrive as standard. 

Higher trim levels will nab active cruise, with stop and go, rear cross-traffic alert, active blind-spot monitoring system and active lane keep assist, while the C 43 scores Mercedes' most advanced auto-driving tech.

Mazda covers the CX-3 with a five-year/unlimited-kilometre warranty, which is the current market standard. Roadside assist is included for the duration. 

Recommended service interval is 12 months/15,000km, and the average annual cost for each workshop visit, for the first seven years, is $438.

An average under $450 is alright, but Toyota’s capped price figure of $195 per workshop visit for the first five years of C-HR ownership puts it in perspective. Mind you, Toyota’s charges step up considerably after that fifth year.

While specific maintenance pricing is yet to be confirmed, each of these models is covered by three-year warranty, with service intervals pegged at 25,000km or 12 months.