Mercedes-Benz C350 E vs Hyundai I40

What's the difference?

Plug-in hybrids will probably not appeal to all buyers, but in the premium space they make sense.

Smooth electric driving paired with the potential for weekend trips outside the 100km-or-so range make the C350e a decent thing, let alone its price parity with the C300.

It still doesn’t top the charts for value or practicality, but even aside from the PHEV tech, the C350e remains a fun-to-drive sedan that holds its own in the executive space.

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

The i40 Tourer in the Active grade is great to drive, it’s practical, and should be low-cost to run. But you can bet the new version, due to arrive soon, will be, too. If you can wait, it's a safe bet the new i40 Tourer will have an updated look, improved safety equipment and retain all the good points of the previous model. 

The C350e doesn’t depart massively from the familiar visual formula that is the current ‘206’ generation C-Class and that’s no bad thing.

Call it conservative if you like, but having seen what’s possible when Mercedes takes risks (hello EQ models), the traditional Mercedes design language is put into healthy perspective. 

Handsome proportions and lines without any fuss - there are no unnecessary creases or panels or materials.

The plug-in C350e comes, as mentioned, with the AMG Line pack, adding 18-inch five-spoke AMG wheels, an AMG front apron, grille insert, and of course EQ Hybrid badging.

The pack also includes AMG Line styling inside, where you’d have to be a Mercedes regular to spot the specifics. The AMG-style steering wheel and seats are the biggest giveaways.

The i40 wagon looks good, I even caught myself doing that admiring 'look back' thing you do when you walk away from your car. Thing is, the current i40 has the ‘old’ Hyundai styling that dates it compared to the new i30, Sonata and Kona, which reflect the brand’s latest look.

This brings me to something you should really know – the newer, updated i40 will arrive in Australia soon, and it will be more in line with Hyundai’s current design approach.

The i40 is also up against some hot-looking rivals. The Mondeo is gorgeous, the Passat is stately, and the Commodore also looks stunning. To be honest the i40 is the least attractive of that lot form where I’m looking. It’s also about the same size as that trio at 4775mm long, 1815mm wide and 1470mm in height.

My mum would call the interior of the i40 Active smart looking, but she doesn’t mean tech-smart, more school dance smart, and if she ever said that before you went to a school dance you’d get changed immediately.

Yes, it looks smart in a tidy, stylish way, but that tiny screen, cloth seats and ordinary plastics lower the tone compared to the Premium's more 'premium' interior. 

The space inside the C-Class remains straight-forward as ever. The layout and features don’t stray from convention, meaning there’s a sizable central screen, digital driver display, central cupholders, and places to put things like a phone, with wireless charging included.

The electrically adjustable seat and steering column make getting into a comfortable position easy, and the memory settings keep it that way.

While physical buttons are scarce, the key controls are easy to access via the central multimedia touchscreen and there’s a lack of complicated sub-menus. It's a refreshingly straightforward system compared to some from rivals, especially that of former category benchmark BMW.

There are fewer than a dozen main tile buttons on the menu, and they’re clear and easy to work out. The main screen also defaults to the navigation, and the climate controls are always visible on the touchscreen.

The central storage area is laid out so a phone sitting in the charging pad is slightly hidden, meaning it’s not a distraction, plus the cover means the cupholders and storage can be hidden away. Tidy!

The AMG-style steering wheel’s haptic controls can be used as regular buttons, but more than once on the test drive I nudged the volume and turned my music back on, just a minor annoyance.

In the second row, there’s generous space for a mid-size sedan, and the seats are comfortable for an adult to ride along for a lengthy trip.

There’s a centre armrest, hidden cupholders, and a generally light and open feeling thanks to the panoramic sunroof.

The battery for the hybrid system sits under the second row seats, which means there’s no uneven flooring in the 315L boot.

The i40 wagon nails the practicality category. Storage space is excellent with a deep, wide console bin under the centre armrest, and there’s another big well in front of the gear shifter. 

There are large pockets in all the doors with bottle holders, two cupholders up front and another two in the fold-down rear armrest, plus another storage area in there, too.

The i40 Tourer’s 506 litre cargo capacity is good, but can’t beat the Passat’s 650 litres, while it matches the Mazda6 wagon’s boot space.

Rear legroom borders on limo territory and even at 191cm I can sit behind my driving position with about 50mm of space between my knees and the seat back. Headroom back there is also extremely generous.
The rear doors open wide, making for an easy exit or entry, too.

There are only two grades in the i40 range - 'Active' and 'Premium'. And when it comes to engines you again have two choices - petrol or diesel. The latter adding $2600 to the price.

If you’re looking for the most affordable way into an i40 wagon go for the Active. Listing at a base price of $35,690, 'our' i40 Active Tourer diesel had one option – 'Ocean View' metallic paint, adding an extra $595.
 
The Active grade costs $9160 less than Premium, and as much as I’d like to say that top-spec car is pretty much the same, with some shiny bits of door trim added, I’d be lying. 

The Active really does miss out on some decent stuff – the screen is the smallest I’ve seen since I wore a digital watch, at 4.3-inch (the Premium has a 7.0-inch), there’s air-con but not climate control, there’s keyless entry but not a proximity key or push button start.

The Active doesn’t get a power tailgate with a handsfree function like the Premium, or tinted rear glass, or a digital speedo, or a panoramic sunroof, or a power adjustable driver’s seat, or heated seats, all of which are standard on the Premium grade.

Yup, the Active may be as base grade as you can get but it still comes with paddles shifters, LED daytime running lights, an electric handbrake with auto hold function, front and rear parking sensors, cloth seats and 16-inch alloy wheels.

A list price nudging $36K may seem high, but don’t’ forget you’re paying more for the diesel engine. There’s good reason to spend the extra on the diesel, too – which I’ll explain below.

The i40 Active Tourer diesel undercuts the $39,040 Ford Mondeo Ambiente diesel wagon, while the Volkswagen Passat 140TDI wagon only comes in the mid-spec Highline grade for $49,990 (and is a bit ‘next level’ by comparison), while the Mazda6 wagon in Touring spec with diesel engine is $41,440. 

Other rivals? Yes, the new Holden Commodore Sportwagon diesel is $38,890. So, compared to its rivals the i40 Active Tourer is a bit of a bargain.

The C350e’s plug-in hybrid drivetrain consists of a 2.0-litre turbo-petrol four-cylinder engine and an electric motor that drives the rear wheels via a nine-speed automatic transmission.

The combustion engine’s peak outputs are 150kW and 320Nm, while the 95kW/440Nm electric motor works with it to land on a total system output of 230kW and 550Nm.

While it’s not lightning quick, the C350e has a decent claimed 0-100km/h sprint of 6.1 seconds, and from the driver’s seat it certainly feels brisk enough to get out of its own way.

This is another area in which our test car impressed with its 1.7-litre four-cylinder turbo-diesel and seven-speed dual clutch auto transmission.

At 104kW, it may be less powerful than the petrol (121kW) but its 340Nm of torque gave it the shove to accelerate impressively from 1750rpm (idle is 800rpm).

The engine and dual-clutch combination performs beautifully; smooth even at low speed in traffic, and shifting down intuitively to make best use of engine braking.

Mercedes officially claims the C350e has a driving range of 104km under NEDC testing, with a 25.4kWh battery supplying the juice.

Official fuel use is just 1.5L/100km, but Mercedes says that becomes 7.6L without any battery charge to help it out.

Under standard 11kW AC charging, it’s about two hours from flat to full, but with the optional 55kW DC fast-charging, it takes about 20 minutes from flat to 80 per cent.

Hyundai will tell you the i40 Tourer diesel will get 5.1L/100km over a combination of open and urban roads. The trip computer in our test car said it was averaging 7.4L/100km. Still, that’s not bad mileage.

The C350e has a few drive modes that are mostly self-explanatory, those being Battery Hold, Electric, Hybrid, Sport and Individual.

You’ll likely find yourself using Electric and Hybrid most of the time, so we’ll focus on those. Sport is fine but somewhat defeats the purpose of the plug-in system for day-to-day driving.

In electric mode, the C350e doesn’t feel like it’s lacking any power without the engine helping it along. Acceleration is smooth, brisk enough, and a 130km/h top speed means you won’t need the engine on your commute.

Realistically, its 104km range is probably somewhere closer to 80km, but covers you for a decent daily distance.

Let the car use the engine to help out via Hybrid mode and, if you’ve got music playing, you might not notice the engine starting and cutting. The system is smooth and it means a much longer life out of the battery before needing to charge. That, and there’s the benefit of more brisk acceleration thanks to the hefty 230kW/550Nm total outputs.

Everything else about the C350e is classic C-Class - the ride is controlled and the suspension does a decent job of soaking up bumps and rough roads, the comfort and self-levelling suspension makes cornering smooth and inspires confidence.

The most noticeable shortcoming for the car is its transmission hesitation if you put your foot down quickly, though the ability to use the paddles to choose your own gears in Sport mode avoids this.

In Electric or Hybrid, the paddles decide how much braking regen to apply, a useful feature that lets you recuperate some power for the battery if your drive includes a lot of downhill slopes or if you’re avoiding relying on the brake pedal.

The C530e’s extra weight doesn’t dull its driving characteristics as you might expect from a car laden with PHEV tech, so it’s a welcome surprise that you could pick up a plush plug-in for the same price as a combustion C300.

A comfortable ride, impressive handling for the class, and a great engine and transmission mean the i40 Active Tourer diesel is engaging and enjoyable to drive. 

The driving position is excellent, the seats are large but supportive, and the pedal feel is spot on. The i40 Tourer is way better to drive than it needs to be and would embarrass some cars from more prestigious brands.

It’s not all perfect: the cabin could be better insulated with wind noise obvious at 90km/h and tyre rumble intruding on course chip roads; visibility is hampered by those slanted A-pillars and the reversing camera image is next to useless thanks to the business card-sized screen in the Active.

Hyundai’s website says the i40 Tourer scores the maximum five-star ANCAP rating. That’s true, but a bit sneaky because that ranking was given to the car back in 2013, and a lot has changed in terms of safety equipment in five years. 

AEB, for example, is becoming common. So is rear cross traffic alert and blind spot warning, along with adaptive cruise control. You can’t get any of this advanced safety equipment on the current i40, not even the top-spec Premium.

Don’t get me wrong, the i40 is extremely safe with its suite of airbags, plus traction and stability controls - it’s just that the bar for safety has been raised higher.

The new i40 is expected to come armed with more up-to-date safety equipment.
 
If you’re fitting child seats you’ll find two ISOFIX mounts and three top tether anchor points across the rear row. It’s great to see a full-sized spare wheel under the boot floor, too.

Mercedes has a five-year, unlimited kilometre warranty which is decent for a premium brand.

Servicing is pricey, though. 

A three-year pack covering a service every 12 months (or 25,000km, whichever comes first) costs $3355, that being just three services.

Four years costs $4630, or five includes a more expensive service and brings the total to $6890. That’s an average of $1378 per service.

Finding somewhere to spend that money shouldn’t be hard as there are 100 dealers listed in Australia.

The i40 Tourer is covered by Hyundai’s five-year/unlimited-kilometre warranty. Servicing is recommended every 15,000km/12months at a capped price of $339. A servicing plan is also available for three years ($777), four years ($1136), and five years ($1395).