Honda Accord vs Mercedes-Benz E400

What's the difference?

Will the new Honda Accord e:HEV RS topple the SUV throne? Unlikely, but it proves sedans can still haul the family around in relative comfort and style.

The new Accord drives stupidly well and offers great ongoing ownership costs, even if it's price tag is a little steep. It's hybrid powertrain also offers fantastic efficiency and that's a big win.

A convertible that doesn't feel like one when the roof is in place is no easy task to build, but it's one Merc's engineers have pulled off with the E400 4Matic Cabriolet. Effortless power, a tonne of technology and a comfy, leather-wrapped cabin all make Merc's drop-top E-Class a strong proposition.

The design for the new Accord is powerful with a sexy silhouette that features a rear spoiler, black accents and sporty 18-inch alloy wheels.

The old chunky grille is long gone and at certain angles you almost get a Nissan 200 SX vibe, which is gorgeously retro and a refreshing take for Honda - which has been playing it safe for the last few years.

The interior is simply styled but looks timeless. The dashboard has clean lines and a featured honeycomb mesh that hides the air-vents. It's a feature which might not land with everyone but it adds personality.

The black upholstery looks plush and there are enough soft-touchpoints to make the cabin feel like it deserves a premium tag.

Elegance. That's the word that springs to mind when you first clamp eyes on the E400 Cabriolet. While the Coupe version has a crouched-over sportiness about its exterior design, the convertible is all about big and boat-like proportions, especially with the fabric roof opened.

Like nearly all drop-tops, the E400 looks best with the cabin open to the elements, and the side profile especially paints a picture of well-heeled wafting, with only the AMG alloys and body styling hinting at the performance on offer under the bonnet.

Inside, expect perfectly executed modern luxury, with soft leather seats, touchpoints that melt under the fingers and a sprinkling of woodgrain trim. All of which feel like old-world luxury, nicely juxtaposed by the huge twin-screen display that dominates the dash.

Access to the cabin is great thanks to wide door apertures but the Accord is a low car to get in and out of with its 134mm ground clearance. Expect a couple of grunts when parked on a hill!

Both rows offer ample legroom but the front enjoys the best of the headroom. A 183cm (6.0ft) friend was lumped with the middle seat and spent the trip dreadfully hunched over and uncomfortable. Save the middle seat for kidlets.

The electric front seats offer decent comfort for a longer trip but it's disappointing that only the driver’s side gets lumbar support.  

The rear row enjoys well-padded seats and amenities, like retractable sunblinds, reading lights, two USB-C ports and directional air vents but it took a while for the back to cool down on hot days which my kid made known. Loudly. 

Storage consists of a large glove box and middle console (which can accommodate a small handbag), a sunglasses holder, four cupholders, four drink bottle holders and two map pockets. There is also a dedicated phone tray but a few extra cubbies up front would be welcomed.

The boot offers plenty of space with its 570-litre capacity, which is great for the class, and you can also open up storage options with the ski-port door, if need be. The powered boot release is a handy feature.

The touchscreen multimedia system looks nice but is a pain in the butt to use until you set some time aside to get to know it. It’s just not intuitive but the screen is responsive and it's a bonus that you get the built-in sat nav and Google apps. 

The new Accord gets wired and wireless Apple CarPlay and Android Auto but it took a few beats to get the wireless CarPlay to work.

The charging options are good throughout the car with four USB-C ports, two 12-volt sockets and a wireless charging pad to choose from.

It's a two-door, four-seat convertible, so practicality isn't at the very top of its list of strengths.

That said, life is peachy for upfront riders, both of whom will travel in spacious luxury. There are two cupholders hidden beneath a woodgrain cover underneath the climate controls - also home to a power outlet - as well as a clever double-hinged central storage bin that can be opened by either the passenger or driver, and which opens to reveal two USB points.

There's room in the doors for bottles, too, and the entertainment system can be controlled via a touchpad controller mounted above the traditional click wheel - although, to be honest, using it is harder and more time consuming than simply pretending it doesn't exist.

Climbing into the back (and we mean climb - there are no rear doors) is made easier by the fact you can fold and slide the front seats automatically by pulling a lever mounted near the headrest. Once there, though, you'll find space is a little tighter, and you feel weirdly cocooned, owing to the huge raised tunnel that runs through the middle of the cabin, and the low roof line.

There are two cupholders that live in the space where the middle seat would normally go, and there's a little bottle-holder cubby to the left of both backseat riders. There are air vents back there, too, but no temperature controls.

The front doors are huge and really very heavy, requiring considerable heft to open them.

The boot space is predictably a little limited, with 385 litres on offer. There's also a little flip-down separator, which shows you how much room the roof will need to come down, reducing boot space to 310 litres. Speaking of which, the soft-top can be lowered in just 20 seconds, and at speeds up to 50km/h.

One practicality quirk, though. The front (and only) doors are huge and really very heavy, requiring considerable heft to open them, especially if you're parked on a slight angle. Honestly, I was reduced to kind of pushing them open with my foot at times.

At $157,400, the Cabriolet is the most expensive model in the E400 family, and is roughly $20k more than the sedan and $10k more than the coupe variants.

That money buys you a comprehensively kitted-out ride - as it really should - with the E400 Cabriolet arriving with 20-inch AMG alloys, LED headlights (made up of 84 LEDs) with high-beam assist, proximity unlocking with push-button start, air suspension and Merc's AIRCAP - a lip above the windscreen that's designed to push air up and over the cabin when the roof is down.

Inside, you'll find leather seats, dual-zone climate control and the clever 'AirScarf' system, which pumps hot air onto your neck when the roof is down (and it's cold out). You'll also nab heated front seats, power windows front and back and an automatic belt feeder, which saves you reaching over your shoulder to get to your seatbelt. So exhausting.

On the tech front, expect a killer 590W, 13-speaker Burmester stereo, controlled by the seriously impressive widescreen cockpit; two 12.3-inch screens that spill from about the centre of the dash all the way to the driver's binnacle, and control everything from navigation to Apple CarPlay and Android Auto.

There's a whole bunch of safety stuff, including semi-autonomous technology, but we'll drill down on that under the Safety sub-heading.

Our test vehicle has an electric continuously variable transmission and features a new self-charging hybrid powertrain that couples two electric motors with a 2.0L, four-cylinder petrol engine that combine to produce 135kW of power and 335Nm of torque.

Only being available in one powertrain may limit its audience but the combo delivers decent performance for a sedan of this size.

It's a fabulous engine, this twin-turbocharged V6 - even if it doesn't feel quite so lively in Cabriolet form as it does in the hardtop equivalents.

The 3.0-litre unit produces 245kW/480Nm, sending it to all four wheels via a nine-speed automatic transmission, linked to the standard 4Matic all-wheel drive system.

The new hybrid powertrain means lower outputs and the official combined fuel cycle figure is just 4.3L/100km! Which is only beaten by the Toyota Camry's 4.0L/100km.

The on-test figure pops out at 5.1L/100km after doing a some urban stuff but mostly open-road driving. Which is where hybrids tend to be the least efficient, so the fuel usage is excellent.

Based on the official combined (urban/extra-urban) fuel cycle and 48L fuel tank, you should see a theoretical driving range of up to 1116km, which is a little less than the Toyota Camry but still an amazing range for a family car.

That range figure drops to around 940km using our real-world average consumption number.

Mercedes claims 7.4L/100km on the combined cycle (but you can expect to be pushing nine litres in real-world conditions), with emissions pegged at 170g per kilometre of CO2.

The 66-litre tank will only accepts 95RON fuel.

Power delivery for the new Accord is pretty punchy and, in most scenarios it’s responsiveness is great. But occasionally, when you’re getting up to speed, there can be a small lag before things kick in.

The Accord handles like a dream and feels firmly planted on the road in corners. Even in high winds, the car feels stable and sure of itself. Delightful.

The cabin is quiet and engine noise is at a minimum most of the time. Around town, the Accord sounds and behaves like an EV. Only once you hit the open road do you get some road noise but it never intrudes on chatting.

It might also be one of the easiest sedans to park and it's got a lot to do with the top-notch 360-degree view camera system and direct steering.

Sure, the E400 Cabriolet can drive itself, but we’re equally pleased to note that it’s still a lot more fun handling the steering duties yourself.

And that is mostly due to that fabulous engine; quiet and effortless at city speeds, rorty and enthusiastic at pace, and genuinely angry with the drive setting switched to their most hardcore Sport+ mode.

We’ve already spent time in the sedan version, and while this Cabriolet is heavier (1935kg vs 1820kg) and slightly slower to 100km/h (5.5sec vs 5.2sec) it doesn’t immediately feel it behind the wheel, with a similar and satisfying lurch into the future when you plant your foot.

But hard charging is not what this car is about, and the E 400 is at its peachy best when rolling about the city or the ‘burbs with the top down, and the warm summer air washing through the cabin.

In its normal drive settings, the steering is light but engaged, and the ride on offer from the standard air suspension is outstanding, cosseting the cabin from all but the very worst road imperfections, while the torque from the V6 serves up effortless, unobtrusive acceleration.

With the roof up, Merc’s designers have done a stellar job of hiding the fact this thing is a convertible at all. It’s a solid-feeling cabin with the fabric roof fastened, and the cabin is quiet and free from wind noise.

There are few cars on the road as overloaded with safety technology as the E400 Cabriolet.

The standard stuff is all there, of course. There's a 360-degree parking camera, as well as nine airbags (dual front, dual pelvic/thorax for front-seat passengers, dual sidebags for rear passengers, dual head bags in the doors and a knee airbag for the driver), rollover protection and tyre-pressure monitoring, as well as braking and traction aids.

But the E400 adds some really clever technology, including Merc's Driving Assistance Package Plus, which adds active lane keeping, blind-spot assist, cross-traffic alert and evasive steering assist.

It's this suite of systems that allows the E400 to navigate freeways autonomously, including changing lanes on demand. At the moment, the system will warn you to keep your hands on the wheel every so often, but you can sense a time when that will no longer be required. And that time is soon.

The E-Class range scored the maximum five-star ANCAP safety rating when crash tested in 2016.

The Accord comes with a five-year/unlimited km warranty, and an eight-year battery warranty, which are now normal terms for the class.

You get a five-year capped priced servicing program and it costs just $199 per service, which is very competitive.

Servicing intervals could get annoying if you put a lot of kays on your car as they're set at every 12-months or 10,000km, whichever occurs first.

Expect the usual three-year, unlimited-kilometre warranty, with service intervals pegged at 12 months or 25,000km. Mercedes' capped-price servicing scheme limits maintenance costs to $2280 for the first three years of ownership.