Infiniti Q60 vs Mercedes-Benz CLS350

What's the difference?

Beautiful looks, good handling, but the driving experience of the Q60 GT is let down by a numbness and disconnection relative to what's happening under you. Refinement isn't on the same level as its BMW and Benz rivals, but the GT is a perfect match for the RC 200t, while remaining good value for money. If you have your heart set on an Infiniti Q60 then I'd skip straight to the top and opt for the Red Sport.

The Mercedes-Benz CLS has proven to be a niche hero, creating a segment and then evolving into something even more elegant, while keeping its unique appeal. A beautiful, modern cabin and the new engine in the CLS 450 provides the swiftness to match those looks.

The Q60 GT is a head turner – literally. Whenever I was driving slow enough to notice, people were rubbernecking to look at the long, low-slung coupe. I'm sure most had no idea what brand of car it was, but in its 'Iridium Blue' paint the Q60 looked amazing with its curvy, sleek profile.

There's only one small issue – the RC 200t and Q60 GT are way too similar looking, right down to their 'signature' shaped c-pillars. I prefer the grille of the Lexus but the rear of the Q60. While there might be a bit of copy-catting going on, both are prettier than their BMW or Benz rivals.

The Q60 GT feels fairly large to drive and the dimensions don't lie – 4690mm end-to-end, 2052mm across with the wing mirrors unfurled, but low at 1395mm.

The cabin treatment is just as emotional as the exterior, with its dual screens, swoopy dashboard and sectioned off driver and passenger cells.

The new-generation CLS has arrived looking slipperier than a cake of soap on the bottom of the bath. This model has always had svelte styling, but things have become even smoother with Benz’s design chief Gorden Wagener insisting more lines be removed in the creation of this latest version.

So, while there’s the familiar profile of that roof tapering down into the boot lid, the long rear overhang and that sliver of a window opening arching and turning down sharply at the rear, it's a more flowing design now that there are less edges to break it all up.

A new ‘shark nose’ grille opening, and broad bonnet adds a hunk of muscle car toughness to the CLS’s face. But it’s refined thuggery, with that single-louvered ‘diamond studded’ grille flanked by flush-mounted headlights. The tail-lights, too, are so contoured to the body around them they look painted on.

As CarsGuide senior editor Matt Campbell pointed out in his review of the CLS at the international launch, the car looks far better in the metal than it does in any photo.

The CLS is based on the E-Class, sharing its platform and technology, but it’s about 20mm longer (at 4988mm) end-to-end. That’s almost 50mm longer than the previous generation CLS, too. At just over 1.4m tall the CLS is low-slung but wide at 1.9m across (almost 2.1m including mirrors).

The CLS’s cabin mirrors that of the E-Class, too, with a sweeping dashboard which flows through into the doors, two large landscape displays for your instruments and media, an oversupply of air vents and some darn sexy lighting. It’s a luxurious, stylish, comfortable, but snug setting cocooned by padded leather and polished surfaces.

The Australian CLS has been fitted standard with the AMG interior and exterior packages.

You can pick from 11 colours – eight of which are no-cost options and include, 'Polar White', 'Obsidian Black', 'Iridium Silver', 'Citrine Brown', 'Graphite Grey' and 'Cavansite Blue'. Optional colours include 'Hyacinth Red' and 'Selenite Grey Magno'.

The short answer is not very practical - but then no two-door sports car really is. So while the front two seats are roomy (although the optional sunroof restricts headroom) the same can't be said for the back seats – at 191cm tall, not only can I not sit up straight (because of the sloping roofline), I can't fit my legs in behind my driving position.

While those large doors open wide the roofline and the lack of rear doors means trying to insert a toddler into his car seat was painful and involved kneeling in the street, there were days we took our much less fancy SUV just because it was easier.

This is a four seater – with two cupholders in between the rear seats and two more cupholders up front. Storage elsewhere is limited, with tiny pockets in the front doors and a small centre console bin to hide your phone and wallet.

The boot is also on the small side at 341 litres – don't compare this to the 423 litre of cargo capacity in the RC 200t which is measured in VDA litres. That said, there was more than enough room for our weekly shop which fitted in snugly, although you have to hoist your shopping bags high to clear that boot lip.

Remember how I said you were going to have to surrender something if you wanted a CLS? Well, yes, you’ve have to surrender your hard-earned money, but you’ll also have to give up quite a bit of practicality.

That swooping roofline makes entry into the front seats a bit precarious for people of my height (191cm) trying to swing themselves into the cockpit without clocking their heads on the A-pillar.

The impracticality only gets worse with entry into the back seats, and legroom in there for me is tight, too.

I can only just sit behind my driving position thanks to the contoured seat backs. Headroom is also limited.

It’s worth pointing out that this time the CLS is a five-seater – the previous generation sat just four.

Storage isn’t bad, running to a deep centre console bin with a split lid, there are two cupholders up front and another two in the rear fold-down armrest along with another covered drawer, and all doors have small bottle holders.

The CLS’s boot capacity is 520 litres, and the rear seats fold 40/20/40 to provide extra space.

Benz has dropped the 250d grade, which means you can no longer have your CLS with a diesel engine. That also means the new entry fee is higher with the CLS 350 kicking the line-up off at $136,900 (list price).

You’ll be rewarded with a decent amount of equipment for the outlay, though. Coming standard on the CLS 350 are those two 12.3-inch screens, a head-up display, a 13-speaker Burmester stereo, sat nav, Apple CarPlay and Android Auto, digital radio, surround view camera, leather upholstery, heated front seats, 'Brown Ash' wood trim on the centre console, wheel-mounted shifting paddles, AMG exterior and interior packages, auto-parking, 20-inch AMG wheels, air suspension, proximity key and privacy glass.

The CLS 450 4Matic lists for $155,529 and adds air filtering in the cabin, power closing doors, a sports exhaust system and all-wheel drive.

At the top of the three-grade range is the Mercedes-AMG CLS 53 4Matic+ for $179,529. The extra money buys you nappa leather upholstery, wireless charging, the ‘Night’ body kit, an AMG exhaust system, and of course, a lot more grunt which you can read about below.

The Q60 GT has a 155kW/350Nm 2.0-litre four-cylinder turbo-petrol engine with drive being sent to the rear wheels through a seven-speed automatic transmission. The same engine is also in the Q60 Sport Premium, while the Red Sport packs a twin-turbo V6.

If you’ve skipped straight to this bit you’ll have missed news that there’s no longer a diesel engine in the CLS line-up. Instead you have a choice of three petrol engines – one for each grade and all of them are new to the model.

The CLS 350 has a 2.0-litre four-cylinder turbo-petrol engine producing 220kW/400Nm. That grunt is delivered to the rear wheels via a nine-speed automatic.

The CLS 450 4Matic has a 270kW/500Nm 3.0-litre in-line six-cylinder engine with a twin-scroll turbo and like the Mercedes-AMG 53 above it has an integrated electric motor called an EQ Boost. While it’s a hybrid system of sorts the electric motor doesn’t drive the wheels, instead it recuperates kinetic energy and charges the battery.

The CLS 450 uses the nine-speed auto, as well, and is all-wheel drive.

The Mercedes-AMG CLS 53 4Matic has the same transmission and engine as the CLS450 but has been given a heftier twin-scroll turbo charging system and tuned to produce even more grunt at 320kW/520Nm. The 'EQ Boost' performs the same function as in the CLS 450, but also provides power to an electric turbocharger. The Mercedes-AMG CLS 53 4Matic is also all-wheel drive and uses a nine-speed automatic.

An official combined fuel consumption figure of 7.7L/100km is fairly optimistic and our combination of urban, city and highway running saw the trip computer reporting back to us with 9.1L/100km. Still, that's not too bad considering how much time was spent in city traffic.

This is a good place to remind you (again) that only one CLS grade was available to drive at the Australian launch – the CLS 450, and we were only given the claimed fuel economy figures for that model.

After 197km through, on a route that bumper to bumpered its way out of Melbourne CBD and headed the long way to the airport via Woodend. our car’s trip computer was reporting close to an average of 10.0L/100km.

I had a feeling this would happen - the GT was disappointing to drive after the Red Sport with the latter's twin-turbo V6, sports suspension, better steering and excellent Sport + drive mode. There's lots to like about the GT, though – the grip is great from the wide Dunlop SP rubber (235 40 R19 front and 255 40 R19 rear), the chassis feels taught, acceleration is good and it's a gorgeous looking car.

But there's a sense of disconnection from the driving experience I couldn't get past, such as the numb feeling in the steering which needed constant re-adjustment. I also think the suspension felt over sprung and lacked composure over small bumps in the road.

The GT and all Q60s don't have the same level of refinement as the C200 Coupe or 420i, evident from the clunky feel of the door handles to the road noise intruding into the cabin.

That 2.0-litre engine is great, but the transmission is a mood killer with it wanting to change up gears quickly to save fuel.

I'm not a fan of the cockpit. Sure it's brave and expressively designed, but the double-deck screens are confusing, there's one for nav, while the other's for media... I think. Then there are things you don't need, such as a digital compass – actually there are two, one on the display and another in the instrument cluster, but there's no digital speedo.

That 2.0-litre engine is great, but the transmission is a mood killer with it wanting to change up gears quickly to save fuel, even in 'Sport' mode.

Here's a curve ball call for you – I've just stepped out of a, Alfa Giulia Super. Close in price to the Infiniti, same sized engine, but infinitely more rewarding and fun to drive – plus you get an extra two doors.

A reminder again, folks – Mercedes-Benz only had the CLS 450 available to drive. Okay? On with the review…

Nobody likes a traffic jam, apart from maybe taxi drivers. But sitting in a CLS deep in Melbourne’s CBD, stuck in road-work-infested roads, choked with cars going nowhere was as pleasant as the experience could be. 

Plush seats, pretty lighting, air filtered and fragranced, air suspension cushioning the patchy tarmac underneath as we wriggled our way north towards Mount Macedon and country roads.

If you read another review calling out a large degree of wind noise filtering into the cabin, they’re right and wrong. See, the weather was apocalyptic as we hit the motorway. Trees doubled over kind of windy, and sure you could hear it rushing past the windows when we were at 110km/h, but you could also hear it clearly when we were at 30km/h.

I like gadgets and so it was about 15 seconds into the motorway stint that I tested out the active cruise control, and automatic lane changing, which works near perfectly.

As the roads became more winding, I switched drive modes to 'Sport', firming up the suspension and steering, at the same time prompting the transmission to kick back into a lower gear.

This is a stable-feeling car, well balanced and effortless to steer. Smoothness is a word for everything it does, including covering the ground quickly.

While that acceleration is rapid, it’s not quite exhilarating, and the engine note under load is a little high pitched for a thug like this.

CLSs of the past were known for being a bit more aggressive and feistier, but this one seems to have mellowed in its third generation. I don’t see any issues with this. There are other angrier Benzs if that’s your thing.

The second generation CLS was never crash tested and this new one has yet to be as well. So, while it hasn’t been given an ANCAP star rating, given it shares so much with the five-star rated E-Class we’d expect it to score nothing less than that, too.

Along with nine airbags, ABS, and traction and stability control the level of advanced safety equipment onboard the new CLS is seriously impressive. There’s the 'Driving Assistance package Plus' which brings AEB with cross traffic function, evasive steering, blind spot warning with an active function and lane keeping assistance.

For child seats you’ll find two ISOFIX mounts and three top ether anchor points.

The Q60 GT is covered by Infiniti's four-year/100,000km warranty.

Servicing is recommended every 12 months/25,000km. Servicing is capped at $538 for the first, then $643 and then $849 for the third.

The CLS is covered by Mercedes-Benz’s three-year/unlimited kilometre warranty. Servicing is recommended every 12months/25,000km for the CLS 350 and CLS 450, while the CLS 53, like all AMGs needs to visit at 12month/20,000km intervals.

Mercedes-Benz says a capped price servicing plan will be available, but has yet to release the prices. We’ll update this as soon as the costs have been announced.