BMW i Series vs Mercedes-Benz C63

What's the difference?

The thing that really grabs you from behind the wheel of a car like this is just how far EVs have come. The fact you can get a ridiculous range and have a really, really good time on the right twisting road is a pretty good deal and solidifies the fact EVs like this one are the future.

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

Note: The author, Andrew Chesterton, is a co-owner of Smart As Media, a content agency and media distribution service with a number of automotive brands among its clients. When producing content for CarsGuide, he does so in accordance with the CarsGuide Editorial Guidelines and Code of Ethics, and the views and opinions expressed in this article are solely those of the author.

The Mercedes-AMG C 63 S Aero Edition is an absolute beast of a car, but it comes at a pretty hefty price. Yes you get a lot of performance, and the fact there are only 63 examples being made for Australia and New Zealand could be enough to get you to sign on the line. For me, though, if I was after a C 63, it’d have to be a wagon. It doesn’t need an Aero pack to look better.

It's hard to talk about the design of the BMW iX3 without spending some time at the front end. This is a bold, bold take on a BMW grille, and one that is entirely devoid of chrome or metallic lashings.

That’s not to say it’s boring. The iX3 has a light theme that runs inside and outside, the latter of which is called the Iconic Glow exterior package, which replaces the physical embellishments with white lighting that frames the kidney grille and the other inserts. It looks very cool and very modern.

In the cabin, the lighting theme continues, this time under the dash inserts that illuminate from within. But that’s not what really draws your eye.

That honour goes to the Panoramic Vision, which replaces the traditional driver’s screen with a pillar-to-pillar display that stretches the width of the cabin and displays all your key driving info.  It seems like a strange thing to get your head around but it felt natural almost immediately, with everything you might need (including a g-meter in its sportiest mode) on display.

Also new is the funky and chunky BMW steering wheel, which reminds me a little of one of those double-sided lizards, in that it can be hard at times to figure out which way is up, and which features 'Shy Tech' (features and controls stay out of sight until the driver or passenger needs them).

All in all, I like the space. There are just enough traditional-feeling elements mixed with new tech to make it feel futuristic and familiar.

I’ve never been the biggest fan of the current C-Class Coupe’s styling. To me, it has always looked a little droopy, a little melted at the back. 

I have to say, the Aero Edition has changed my opinion somewhat, as the new graphic elements help lift it up a bit, visually raising its rear up like a stretching cat, tail in the air. I’m still not 100 per cent on it, but to my eye it’s better.

The carbon-fibre trim elements that have been added to the exterior certainly add some menace to the look, too, and I simply can’t help but constantly notice out of the corner of my eye the AMG pressing in the staggered, dished rims. At a glimpse, from a distance,  it looks like rim damage, but thankfully it’s not!

The staggered set-up does really add some width and mongrel to the look, as if it needed more, with its open maw lower bumper air dam, and the signature 'Panamericana' grille treatment which looks like an evil character out of a movie. If you know the one I’m talking about, let me know in the comments.

As much as the look matters when it’s parked in your driveway, it’s the cabin that arguably matters more, right? That’s where you spend your time, after all. Check out the interior images to see if you think it lives up to the exterior look.

The BMW iX3 is 4782mm in length, 1895mm in width, 1635mm in height and it rides on a 2897mm wheelbase.

It doesn't feel huge, but there's certainly enough space in the back seat for me. At 175 centimetres I have enough knee and headroom sitting behind my own driving position, plus you can adjust the angles of the rear backrest to get a little more comfy.

But while the front seat feels very modern, the rear is more a traditional back seat experience. Back seat riders get their own air vents and temperature controls, twin USB-C charge ports and a pull-down divider with twin cupholders, but that's about it.

The auto-opening boot reveals a 520-litre luggage space (1750 with the seats folded), all of which is unencumbered by charging cables and the like, which are housed in the 58-litre frunk.

Towing and electric vehicles are never the greatest of matches, such is the drain on the battery, but the iX3 can be fitted with a standard tow ball, unlocking a braked trailer capacity of 2000kg.

No two-door coupe is going to offer you the space and comfort of a sedan or wagon, that’s just a fact. But that only matters if you plan to actually use the rear seats. If you don’t, then the Coupe version of the C 63 S might be perfect for you.

Even so, I managed to (only just) squeeze myself between the seat and the door opening to slide into the rear row. This won’t be easily achieved by all attempters, especially on the driver’s side.

Let’s just say I probably looked like I was doing something very weird to the driver’s seat as I spider-manned my way in. 

The rear space is tight for someone my height (182cm/6’0”) behind their own driving position, with knees hard-up against the seat in front and not much headroom (my noggin’ was brushing the ceiling) or toe space (size 12s don’t fit so well) to speak of.

It’s certainly a selfish car. Or maybe it’d be fine for smaller kids. There are two spaces in the back, both with ISOFIX child seat anchors and top-tether points.

But there is storage in the back - cupholders and storage caddies either side of the seats, though the storage situation improves in the front zone, with bottle holders in the doors, cupholders between the seats, loose item storage under the media screen and a covered centre armrest bin, too.

The front cabin is a special looking place, with carbon-fibre abounding across the dash and nice trim on the doors. The AMG steering wheel is a sight to behold - it’s a flat-bottomed unit with carbon-fibre and Dinamica (that’s Benz talk for microsuede) trim: perfect for sapping sweat as you manhandle the C63 through the bends.

The seats are AMG Performance sports units up front, and the trim used is reserved for this model specifically: Nappa leather with yellow stripes. There are yellow details elsewhere, including on the rear seats, centre console and dash, and it certainly adds some visual excitement.

Media is controlled by a 10.25-inch display and Mercedes-Benz’s touchpad control system, but there is no touchscreen - rendering the Apple CarPlay and Android Auto smartphone mirroring technology somewhat tedious.

I’ve always had a gripe with screens that don’t allow touch but feature the tech that’s designed to transfer your phone’s screen to the media unit, and I can tell you the longer you spend twiddling the dial to get where you want to go, the more annoying it becomes.

The Burmester sound system has 13 speakers and is rather good, but I prefer the sound from the standard fit variable sports exhaust. So maybe that quibble with CarPlay isn’t that big a deal.

And if you just want to charge your phone, and there’s a second USB port up front, as well. Note: in non-Aero Edition C 63 models without the carbon-fibre interior pack, you also get Qi wireless phone charging, but it’s deleted from this variant and any model with the carbon pack.

The driver has a 12.3-inch digital info display to show where you are and what the car is up to, and there’s a head-up display as well. Yep, there’s standard sat nav with live traffic updates (and even live fuel price updates) - it’s just a shame the maps still look early 2000s-spec in 2D layout.

Cargo space is okay. The claimed cargo capacity or boot volume is 355 litres (VDA) with the rear seats in place. That’s small for a coupe of this size, and the shape of the boot (with a hump behind the rear seat) isn’t great as things do move around quite a bit.

But, thankfully, Mercedes has included its clever foldable storage box system under the boot floor - it goes where you might usually expect a spare wheel, but there isn’t one in this car. Instead you get Mercedes’ 'Tirefit' repair kit with an electric pump.

Look, I’m not likely to ever be in the position to say that a car that costs $188,600 plus on-road costs is “good value”, but to be honest, if you’re in that position, you’ll be getting plenty of car for your cash.

The Carbon Edition of the C 63 S Coupe adds $17,200 over the standard version of the high-performance two-door, but it adds a bunch of extras to help justify its price. A car like this is always going to be seen by some as a profligate purchase, right? You need to be able to justify spending an extra MG3’s worth of cash on this Edition. 

The noticeable exterior bits include an AMG Performance rear spoiler, a model specific front lip, rear diffuser, and side facings for the rear apron air vents. Carbon-fibre is used in the front apron A-wing, the side sill inserts, rear diffuser insert, rear spoiler and the side mirror casings. 

There’s more carbon-fibre inside the cabin, which we’ll cover off in the interior section. Other additions over the standard C 63 S Coupe include ceramic composite front brakes (402mm six-piston) and 360mm single-piston rear brakes, and there are “ultra-lightweight” AMG forged 'Matt Black' alloy wheels with 19-inch rims at the front and 20s at the rear. 

And in nice news, the car you see here has no optional extras fitted at all. The colour is 'Iridium Silver', one of only two options for this limited run model (the other available hue is Polar White, and both come at no extra cost).

Standard inclusions comprise leather interior trim, heated and electric adjustable front seats, dual-zone climate control, a 10.25-inch media screen with sat nav and smartphone mirroring, DAB radio, 13-speaker Burmester sound system, 12.3-inch digital driver info display, head-up display (HUD), ambient lighting, and performance items like active dynamic engine mounts, an adaptive AMG performance exhaust, a rear differential lock, and adaptive sports suspension.

Plus there’s a full-spec safety offering which we’ll cover in the section below.

Thinking about what cars compete with this one? There’s the Audi RS 5 Coupe (from $150,900), the Lexus RC F (from $136,636), and the BMW M4 Competition (from $167,829). So the C 63 S - which is already expensive comparatively - looks positively pricey in Aero Edition spec.

We’ll focus on the 50 xDrive, as that’s the one we’ve driven, and because the powertrain is a peach. Its twin-motor all-wheel drive set-up delivers a total 345kW and 645Nm, which is a lot. And because there is no traditional transmission to step through, and because all that oomph arrives at once, it feels plenty punchy indeed.

BMW says the sprint to 100km/h takes 4.9 seconds, and we believe them. Top speed is a claimed 210km/h.

Open the shapely bonnet of the C 63 S and you’ll find a hand-assembled horsepower-monster engine with a printed name plaque to prove it.

The 4.0-litre twin-turbo V8 produces 375kW of power at 6250rpm, and 700Nm of torque from 2000-4500rpm. It runs a standard-fit nine-speed 'Speedshift MCT' (multi-clutch transmission) automatic, and it’s rear-wheel drive. And yes, that means it likes to boogie.

The claimed 0-100km/h time is just 3.9 seconds, and top speed is apparently pegged at 250km/h. Yeesh.

The name on the “Handcrafted by” plaque on this particular engine? Hat tip to you, Julian Rembold. This is quite a piece of work. 

As we mentioned at the top of this review, this is another big plus for the iX3. Its massive 108.7kWh net NMC battery delivers a maximum driving range of 805km, which is frankly ridiculous. To get it, you need to engage Efficiency Max, which dulls the drive experience, but that is an impressive number all the same. Engage the sportier settings and the figure drops to more like 650km-plus. 

Charging is 22kW AC and an impressive 400kW DC – or 300kW in the upcoming 40 model — which means a 10 to 80 per cent charge in 21 minutes when plugged into the fastest of chargers.

BMW says to expect 15.1-17.1kWh/100km in terms of energy usage on the WLTP cycle.

High numbers are what AMGs are about. Sadly that’s the case not only for performance outputs but also fuel consumption.

The official combined cycle fuel use claim for the C 63 S Coupe is 10.3 litres per 100 kilometres, and you need to fill it with 98RON premium unleaded fuel, too.

On test? Well, across a mix of different driving - urban, highway, back road and spirited stints - I saw an 'at the pump' return of 12.2L/100km, while the digital readout stated 12.0L/100km.

Given the performance on offer, and how much I took advantage of it during my week with the car, that’s not bad…

Fuel tank capacity is 66 litres. So go easy if you know there won’t be a fuel stop for a while.

BMW spent a lot of time describing this car as being of revolutionary importance to the brand. It was designed as an EV from its inception, but is also the flag bearer for the New Class gen of cars, and so it has all sorts of features and tech that will roll out across the rest of the BMW range.

Does it feel overly revolutionary from behind the wheel? Not really. I mean, it drives forwards and backwards, and turns around corners when you move the wheel, all of which is to be expected.

But it does mostly feel very BMW, which I think is what they meant. The Jekyll-Hyde nature of the iX3 becomes apparent the moment you engage its sportiest driving modes and flatten your foot. This is proper push-you-back-in-your-seat acceleration that feels slightly more violent than the iX3's claimed zero-to-100km/h time suggests.

Then there's the flip side of that coin. Engage Efficiency Max and you can seemingly drive forever (or at least more than 800km), sipping battery juice and riding in peace, quiet and comfort. 

But at its core, and no matter the drive mode, it feels like a BMW. Crucial to that is a thing the brand calls the Heart of Joy, which sounds utterly sci-fi but really is a computer brain that works on traction and power to make sure you never lose grip.

If you've ever been in a car where the traction control light is flashing on a dash, you'll know what usually happens is it cuts engine power until you find grip, and it gives you power again, then cuts it, then gives it to you as required to find the grip, and it can give you that kind of jerky, stop-starty kind of feeling.

The iX3 doesn't do that. Instead, it plays with traction and is far more subtle without ever cutting power, and gives you the feeling of being able to tip into a corner and then power out without ever feeling like you're going to lose grip, or power.

The bigger electric motor is at the rear axle, which delivers most of your performance unless you need extra grip. So, when you are powering out of a bend, it feels a lot like a rear-wheel drive car and really well sorted from behind the wheel.

If that's the driver's side of the equation, the other side of it is pretty good, too. We took to the town at city speeds, and it was super comfortable, quiet and absorbed most of the road imperfections pretty easily.

Interestingly, the suspension isn't high-tech. There's nothing adaptive about it, and there's no air cushioning or anything like that. But it feels well tuned, and is pretty comfortable, even on dodgier road surfaces, while still delivering a sense of connection.

My favorite kind of mid-size SUVs are ones that have that dual nature. Something that has space for the family and all of their things, but also something that can be a fair bit of fun on the right twisting road, and this one absolutely nails that brief. It is a hoot to drive on twisty stuff. 

Downsides? Well, you can't entirely disguise more than two tonnes of weight. If you're going downhill, especially on a twistier road, you can feel the weight around you, especially when you go to pull up in a hurry, despite the strong-biting brakes.

The other thing is the steering, which is direct and lovely but quite light. It doesn't have that meaty heft some BMWs offer, and as a result, it can be interesting to place the vehicle. You can find yourself a bit further over in the lane, or further away from an apex than you're expecting, because your light inputs have really shifted the vehicle. 

But BMW has nailed the brief here. Do keep an eye out for the cheaper one that's coming, though. It could be a bang-for-bucks, rear-drive bargain.

Just one word sprang to my mind when it comes to accurately describing the performance on offer from this car. The word is ‘brutal’.

Smash the accelerator and the power and torque on offer is enough to make your eyes feel like they’re not doing the right thing anymore. You get pushed back in your seat with a surge, and your ears are also rewarded with one of the best soundtracks in the automotive world. 

The engine builds pace with enormous intent, and the sound that comes from under the bonnet and out the back through the exhausts is addictive.

Yes, there is an active exhaust button which you have to press to make sure that you hear all that noise if you’re running around in 'Comfort' mode, and during my time with the car it was active the whole time.

I had some questions from neighbours over the week that I had this car about whether it was actually nice to live with on a day-to-day basis. And the answer is yes, if you put it in comfort mode it’s surprisingly amenable. 

The ride is really well sorted at pace despite having a bit of that trademark low-speed wobble that seems to afflict Mercedes products from A-Class through to the GLE SUV. But it wasn’t bad enough to really bother me, as most of my time was on highways and backroads.

The steering is direct and accurate. The only thing you need to be aware of is that you will lose traction at the rear axle when you put your foot down hard. And for the enthusiast that’s exactly what you want. 

I know I want to feel the thing squirm under throttle. It’s a rear-drive V8 coupe, after all. You want to feel like you’re a vein in its bicep muscle; you know, the one you see in a weightlifter’s arms – the one that wiggles around a lot. You want to have that. Right?

On the performance front it is exceptional. Twist the little dial on the wheel to 'Sport' or 'Sport+' (I didn’t sample 'Race' mode as I wasn’t at a racetrack), and everything feels like it’s had a protein shake.

Even so, in that mode it steers brilliantly, there's a nice feel through the wheel, and the ride, while stiff, controls the body brilliantly when you change directions. 

The transmission is very good, too. In Comfort mode it can take just a second or two at first to become accustomed to the idea that you want to drive aggressively.

But in Sport mode, or when you select the manual transmission mode using the trigger button on the steering wheel, you will certainly get the most out of the engine. That’s what I did when I was driving it in a ‘spirited’ manner.

If you are just after that high-end Coupe cruiser experience, it’s a relatively quiet car (provided the surface below isn’t the coarsest of coarse-chip bitumen), with enough luxuriousness to make it feel premium as well as sporty. That’s an important thing to consider, especially at this price point.

There is no applicable ANCAP crash test rating for the Mercedes C-Class Coupe, nor is there one for the C 63 specification. But when it was tested back 2014, the sedan scored five stars - as you’d expect.

It is comprehensively equipped in terms of safety technology, including auto emergency braking (AEB) with pedestrian and cyclist detection (from 7.0km/h to 70km/h) and it’s active for cars from 7.0km/h to 250km/h.

Plus there’s lane departure warning and active lane keeping assistance (from 60km/h to 200km/h), blind spot monitoring with 'Active Blind Spot Assist' that will stop you from veering into oncoming traffic, front and rear cross traffic alert, and adaptive cruise control (Distronic) with traffic jam assist.

The C 63 also features 'Route Based Speed Adaptation', which can adjust your speed based on where the car thinks you are on the map. Just note - if you’re driving through new tunnels that haven’t been flashed to your car’s nav (as happened to me in Sydney during my testing week) - then you could find the car dramatically braking for surface-level intersections. You can switch the system off, thankfully.

There are nine airbags fitted, and while you mightn’t use the rear seats much there are ISOFIX and top tether points for both positions (yes, only two).

BMW offers a five-year, unlimited kilometre warranty, which is about right for the traditional premium players, but off the pace elsewhere. The traction battery is then covered for eight years or 160,000km.

The service intervals are condition based, rather than timed, and BMW sells a pre-paid package for the iX3 which is $1614 for four years, or $2420 for six years.

You can upgrade either to what BMW calls Service Inclusive Plus, which includes high-wear stuff like brake discs and pads and it is $5535 for four years or $6615 for six years.

There are around 50 BMW dealers across Australia covering mainly cities and key regional centres.

Mercedes-Benz is among the minority of luxury brands now offering a five-year/unlimited kilometre warranty plan - most still have three-year cover. So that’s a tick.

And the service intervals are pegged at 12 months/20,000km. Another tick.

Plus you can either pre-pay your service plan in three-year ($3800), four-year ($6000) or five-year ($6550) plans - roll it into the finance package, and it won’t hurt quite as much.

According to Mercedes, the three-year coverage option makes for a $900 discount over pay-as-you-go servicing.

Roadside assistance covers the five-year new car warranty period, too. So Mercedes seemingly takes good care of its customers. But if you have any concerns or questions over reliability, problems, issues or complaints about the C 63, check out our AMG C 63 problems page.