Chrysler 300 vs Mercedes-Benz GLS-Class

What's the difference?

The Chrysler 300 SRT is a big, fast, well-equipped and super-comfortable point-to-point tourer that’s also able to soak up the stresses of a city commute with ease. It’s also showing its age in terms of design, obscenely thirsty, dynamically flawed, and offered with a bottom-of-the-class ownership package. A fun place to visit but make sure you’re ready for permanent residency.

The GLS63 is an intimidating beast from afar, but it rewards its occupants in almost every way. Yep, there really isn’t a box it doesn’t tick without serious compromise, such is its breadth of capability.

If there was ever a Swiss Army Knife of cars, the GLS63 is definitely a contender for the title, one that makes it very hard to wipe the smile off your face. Just make sure you can fit it in your garage first…

The NSW Highway Patrol has adopted the 300 SRT as its weapon of choice, and psychologically I reckon they’re onto a winner.

A high waistline, small glasshouse and big 20-inch rims combine to give the 300 a chunky, take-no-prisoners stance. And this intimidating beast filling the mirrors is enough to make even the most determined speedster drop their bundle.

Except for the SRT badge at the back, the exterior is a chrome-free zone, with black finish on the big honeycomb grille, window frames, and dark chrome wheels dialing up the overall air of menace.

The rear view is similarly imposing, with a large slab of almost right-angular boot lid topped by a pronounced body-colour spoiler.

At this point, we have to call out less than perfect panel fit. On our test car for example the intersection of the bonnet and front clip above the headlights was messy with inconsistent shut lines and poor alignment.

Inside not much has changed over the current 300’s seven years on sale, and the design lacks the integrated approach of more modern competitors.

An 8.4-inch colour media touchscreen sits in the centre of a squared oval panel between the central air vents and under an analogue clock, that shape bearing no resemblance to the form of the heating and ventilation control panel below it or the instrument binnacle alongside.

A mass of buttons confronts the driver across the centre stack, steering wheel and door, while genuine carbon fibre inserts add a racy if slightly ironic touch in a close to 2.0-tonne car.

Leather and suede sports front seats look (and feel) the business, and the strongly illuminated gauges are divided by a 7.0-inch multifunction display including a clear digital speed read-out. Which is just as well, because the fussy increments on the analogue dial are hard to read.

If the GLS63 was a Marvel superhero, it would undoubtedly be the Hulk. Simply put, it has road presence like few others. In fact, it’s frankly menacing.

Of course, the GLS is already pretty intimidating due to its sheer size and blocky design, but the GLS63’s full-fat AMG treatment takes it to another level.

Naturally, the GLS63 gets an aggressive body kit, with its purposeful bumpers, side skirts and rear spoiler serving as instant reminders of what you’re dealing with, but it’s AMG’s signature Panamericana grille insert that really hammers home the point.

Around the side, the GLS63’s 22-inch alloy wheels with staggered tyres (front: 275/50, rear: 315/45) make their presence known, positioned below the wheelarch extensions.

That said, some fun’s also had at the rear end, where the GLS63’s diffuser element integrates the foreboding sports exhaust system with quad tailpipes very neatly.

The focused Multibeam LED headlights also look the part, while the opposing LED tail-lights tie everything together outside quite nicely.

Inside, the GLS63 stands out from the GLS crowd with its sports steering wheel with Dinamica microfibre accents, and multi-contour front seats, which are covered in Nappa leather alongside the armrests, dashboard and door shoulders and inserts.

Of note, the doors bins are unfortunately of the hard plastic variety, which is very disappointing in a vehicle that costs this much. You would expect that cow hide would also been applied to them, but alas it isn’t.

The GLS63’s black headliner serves as an obligatory reminder of its sporting intent, and while it makes for a dark cabin, metallic accents are prominent throughout, while the optional trim (our test vehicle had carbon-fibre) mixes things up, alongside the ambient lighting.

And let’s not forget the GLS63 is still loaded with plenty of cutting-edge technology, including a pair of 12.3-inch displays, with one the central touchscreen and the other the digital instrument cluster.

Both are powered by Mercedes’ class-leading MBUX multimedia system and feature Apple CarPlay and Android Auto support. This set-up arguably remains the best there is today thanks to its speed and breadth of functionality and input methods.

At just under 5.1m long, 1.9m wide and close to 1.5m tall the 300 SRT is a sizeable machine, so it’s no surprise there’s plenty of room inside.

Those up front are provided with a pair of cupholders in the centre console (complete with heating or cooling at the press of a button), storage bins and medium-size bottle holders in the doors, a long oddments tray and a small storage cubby (with 12-volt outlet) near the gear shifter, as well as a sunglasses holder in the overhead console and a big glove box.

There’s also a lidded storage box between the seats, complete with sliding tray, two USB ports, an ‘aux-in’ jack and a 12-volt outlet. Even old school nicotine enthusiasts are catered for with an ashtray insert ready to slip into one of the cupholders and a cigarette lighter to drop into the main 12-volt socket.

Rear seat passengers pick up a fold-down centre armrest with two cupholders and a lidded oddments box, decent door bins with bottle holders, as well adjustable vents at the back of the centre console, two USB ports, and switches for the standard heated rear seats.

Sitting behind the driver’s seat set for my 183cm position I had ample legroom but only adequate headroom. There’s enough shoulder room for three adults across the rear, but the broad transmission tunnel throws a spanner in the works when it comes to centre foot room.

The fully-lined boot is nicely trimmed, with a pair of flip-out bag hooks (22kg capacity), load tie-down anchors, and useful lighting included.

Volume is 462 litres, enough to fit our three-piece hard suitcase set (35, 68 and 105 litres) lying flat on the floor, or the CarsGuide pram, with heaps of room to spare. A 60/40 split-folding rear seat adds extra space and flexibility.

In the case of a flat tyre your only option is a repair/inflator kit, and it’s worth noting towing capacity for the SRT is the same 450kg for a braked or unbraked trailer, where the standard V6-powered 300C can tow a 1724kg braked trailer.

Measuring 5243mm, 2030mm wide and 1782mm tall with a 3135mm wheelbase, the GLS63 is an upper-large SUV in every sense of the term, which means it’s also very practical.

For example, cargo capacity below the load cover is decent, at 355L, but stow the 50/50 power-split-folding third row via the boot and it’s very good, at 890L, or drop the 40/20/40 power-split-folding middle bench, too, and it becomes a cavernous 2400L.

Better yet, the boot’s aperture is almost square, and its floor’s flat, while there’s no load lip to contend with, making loading bulkier items even easier. Up to four tie-down points are also on hand (depending on seating configuration) to secure loose cargo.

Under the false floor is the space-saver spare, which is to be expected, but what isn’t expected necessarily is the fact there’s also enough room there for the cargo cover when it’s not in use, which would be the case if six or more passengers are regularly onboard.

Moving into the power-sliding second row, the GLS63’s practicality is once again brought to the fore, with up to six-plus inches of legroom available behind my 184cm driving position.

There’s also two inches of headroom with the panoramic sunroof in situ, not to mention just enough toe-room. The GLS63’s small transmission tunnel and sheer width also mean three adults can be seated on the middle bench with few complaints.

Amenities-wise, the second row has map pockets on the front-seat backrest and a small fold-down cubby below the rear climate controls, with it containing two slots for smartphones and a pair of strategically placed USB-C ports.

The rear door bins can take one large bottle each, while a fold-down central armrest is also on hand, featuring a shallow tray and retractable (and flimsy) cupholders.

Alternatively, the $2800 Rear Seat Comfort Package fitted to our test vehicle subs in a tablet that can control the multimedia system, a wireless smartphone charger and a small cubby into the former, as well as a heated/cooled cupholder atop the rear of the centre console.

In the third row, it’s not quite as roomy if you’re an adult. With the middle bench in its most accommodating position, my knees still brush up against its backrest, which is to be expected given it’s primarily designed for children. I also have an inch of headroom there.

Nonetheless, getting in and out of the third row is relatively easy as the power-operated middle bench tumbles forward and provides just enough space to make entry and exit somewhat graceful.

When seated, rear occupants are treated to two USB-C ports and one small cupholder each, so they’re arguably taken better care of than those in the middle.

Child seats are well and truly accommodated, with four ISOFIX and five top-tether anchorage points fitted across the second and third rows, although the latter will inevitably prove to be a much tighter fit.

The driver and front passenger are still taken care of, with a front cubby taken up by two heated/cooled cupholders, a wireless smartphone charger, two USB-C ports and a 12V power outlet, while their door bins take one large and one small bottle each.

In-cabin storage options include the large central storage bin, which hides another USB-C port, while the glovebox is on the smaller side, with about a third of it taken up by the fragrance, which is pumped into the cabin to ensure the interior always smells its best.

Priced from $255,700 plus on-road costs, the GLS63 commands a $34,329 premium over its predecessor, although buyers are arguably getting more bang for their buck than before, even if it does sit well clear of the two other GLS variants: the $147,100 GLS450 and $153,900 GLS400d.

Standard equipment not already mentioned in the GLS63 includes regular metallic paintwork (our test vehicle was finished in Selenite Grey), dusk-sensing lights, rain-sensing wipers, power-folding side mirrors with heating, soft-close doors, roof rails, rear privacy glass and a power-operated tailgate.

Inside, keyless entry and start, augmented reality (AR) satellite navigation with live traffic, digital radio, a 590W Burmester surround-sound system with 13 speakers, a head-up display, a panoramic sunroof, heated seats (including middle outboard) and armrests, cooled front seats with massaging functionality, power-adjustable seats, a power-adjustable steering column, temperature-controlled front cupholders, five-zone climate control, stainless-steel pedals and an auto-dimming rearview mirror feature.

With BMW not offering an X7 M (although the slightly smaller $209,900 X5 M Competition is available) and the $208,500 Audi RS Q8 really from the segment below, the GLS63 does not have a direct rival in the Upper-large SUV segment.

In fact, the $334,700 Bentley Bentayga V8 is actually the model that comes closest to the GLS63 when looking for a seven-seater with a similar level of bent-eight performance.

Forget hybrid, forget turbos, the Chrysler 300 SRT is powered by 392 cubic-inches of Detroit iron… although the 6.4-litre ‘Apache’ V8 is actually built in Mexico.

The engine’s block is indeed cast iron although the heads are aluminium, with the ‘Hemi’ name derived from its hemispherical combustion chamber design.

It’s naturally aspirated, direct fuel-injected and produces 350kW (470hp) at 6150rpm and no less than 637Nm of torque at 4250rpm.

Drive goes through an eight-speed automatic transmission to the rear wheels with a limited-slip diff standard.

The GLS63 is powered by a familiar 4.0-litre twin-turbo V8 petrol engine, with its version producing a thumping 450kW of power at 5750rpm and 850Nm of torque from 2250-5000rpm.

This unit is mated to a nine-speed torque-converter automatic transmission and AMG’s fully variable 4Matic+ all-wheel-drive system with torque vectoring and a rear limited-slip differential.

This set-up also features Mercedes’ EQ Boost 48V mild-hybrid system, which actually gives a 16kW/250Nm electric boost in short bursts, such as when accelerating off the line.

Speaking of which, the GLS63 sprints from a standstill to 100km/h in just 4.2 seconds, while its top speed is electronically limited to 250km/h.
 

A model of fuel efficiency this car is not. Claimed economy for the combined (ADR 81/02 - urban, extra-urban) cycle is 13.0L/100km, the 300 SRT emitting 303g/km of CO2 in the process.

Over roughly 300km of city, suburban and freeway running we recorded 18.5L/100km (at the bowser), and the on-board computer threw up some horrifying short-term numbers as we explored the car’s performance potential.

Minimum fuel requirement is 95 RON premium unleaded and you’ll need 70 litres of it to fill the tank… regularly.

The GLS63’s fuel consumption on the combined-cycle test (ADR 81/02) is 13.0L per 100km, while its carbon dioxide emissions are 296 grams per km. All things considered, both claims are unsurprisingly high.

In our real-world testing, we averaged a fearsome 18.5L/100km over 65km of driving, split between highways and country roads, so not your usual mix. A very heavy right foot definitely influenced that result, but don’t expect to do too much better in a normal run.

For reference, the GLS63’s 90L fuel tank can be filled up with 98RON petrol at a minimum.

Roll onto a smooth, dry surface, engage the SRT’s standard launch control function and you’ve dialled in the ability to storm from 0-100km/h in a ludicrously rapid 4.5sec.

Unlike smaller capacity turbo engines, the big atmo Hemi takes a while to develop maximum torque (637Nm), hitting peak pulling power at 4250rpm. Keep the throttle pinned and full power (350kW) is achieved on the cusp of the rev limiter at 6150rpm.

All this fire and fury is accompanied by a beautifully brutal V8 roar courtesy of an active exhaust which tweaks the pulsing note it produces according to drive mode and throttle position. It’s hard not to love it, complete with rude pops and crackles on the over-run.

Beware though, this car is relatively loud all the time, so you’ve got to hope the love affair is a long-term one.

Suspension is by a short and long arm (SLA) and upper A-arms at the front, with a five-link set-up at the rear, and Bilstein adaptive dampers all around.

The switch between Comfort and Sport is swift and marked, with the latter best kept for billiard tables and race circuits. Around town ride in the more compliant setting is agreeably smooth.

Push the big 300 along your favourite backroad and you know you’re asking two tonnes of metal, rubber and glass to move against its will.

The eight-speed auto responds well in manual mode (with wheel-mounted paddles), and the grippy sports front seats do decent job of keeping their occupants stable and balanced, but the sheer mass of this car means you’re never going to get a corner-carving hot hatch-like experience.

And despite a chunky, leather-trimmed sports wheel, the hydraulically-assisted ‘SRT Tuned’ steering isn’t exactly the last word in road feel or sharp response.

Having said that, the fat 20-inch (245/45) Goodyear Eagle F1 rubber grips hard with minimal impact on ride quality, and in a more relaxed mode the SRT is a stress-free and comfortable tourer.

Big acceleration is balanced by big brakes, with beefy ventilated rotors (360mm fr / 350mm rr) clamped by Brembo four-piston calipers front and rear.

The system’s outright power is impressive but can be abrupt on initial application at around town speeds, until you get used to greasing the pedal pressure in.

‘SRT Performance Pages’ allows you to scroll through multiple real-time data screens (timers, G-force, engine performance, etc), which is fun, with outputs downloadable to a USB stick or SD card. The 19-speaker harman/kardon audio system absolutely cranks, and the active cruise control works intuitively, without the frustrating conservatism (taking forever to pick up the throttle) of some other systems

Frankly, the GLS63 has absolutely no right being as capable as it is. It’s a really big bus that’s legitimately convinced it’s a sports car half its size.

Being a GLS variant, the GLS63 has independent suspension consisting of four-link front and multi-link rear axles with air springs and adaptive dampers, but its party trick is the addition of active anti-roll bars.

In what feels like magic, the GLS63 is simply not intimidated by corners, despite having massive dimensions and a considerable 2555kg (kerb weight) to deal with.

The active anti-roll bars make the GLS63 so much easier to drive fast through the twisty stuff, almost eliminating body roll, taking one key variable out of the equation for the driver. Active engine mounts are also fitted, helping to settle things even further.

The electric power steering on hand is also good. It is speed-sensitive and has a variable ratio, which basically makes the set-up more direct when it needs to be. It’s typically light in hand, too, until one of the sportier drive modes is engaged and extra heft is added.

So, handling is scarcely believable, which means the ride must be compromised, right? Yes and no. With the adaptive dampers in their softest setting, the GLS63 is very compliant. In fact, we’d say it feels luxurious when compared to other high-performance SUVs.

That said, our test vehicle was fitted with the optional 23-inch alloy wheels ($3900), which look the part but expose sharp edges and other road imperfections, not to mention generate noise easily heard inside. Naturally, feedback is exacerbated in the sportier drive modes.

Anyway, there’s more performance, and the GLS63 has the rest in spades. Its engine is a powerhouse in every sense of the word. It’s so powerful, in fact, that it hilariously hunkers down off the line or when suddenly accelerating at low speed.

Thanks to the mild-hybrid system, wads of torque is available from the get-go, making for a highly responsive driving experience, even in those rare moments when the engine isn’t on song.

While not as characterful as some of the other members in the 63 series, the GLS63 still makes some thoroughly entertaining noises, with its sports exhaust system popping like mad while on the overrun.

All of this ability is very well and good, but you need to be able to pull up quickly, and the high-performance braking package (400mm front and 370mm rear discs with six-piston fixed callipers and single-pot floating stoppers respectively) mercifully does exactly that.

Neither ANCAP nor its European counterpart, Euro NCAP, have awarded the GLS range a safety rating, but it’s fair to assume it would perform well in testing.

Advanced driver-assist systems in the GLS63 extend to autonomous emergency braking with pedestrian and cyclist detection, lane-keep and steering assist (including emergency), adaptive cruise control, active blind-spot monitoring, rear cross-traffic alert, traffic sign recognition, driver attention alert, high-beam assist, tyre pressure monitoring, hill-descent control, hill-start assist, park assist, surround-view cameras and front and rear parking sensors.

Other standard safety equipment includes nine airbags (dual front, front-side, curtain and rear-side plus driver’s knee), anti-skid brakes (ABS), electronic brake-force distribution (EBD) and the usual electronic stability and traction control systems. Yep, it doesn’t leave much to be desired on the safety front.

The warranty world has moved significantly in recent months, and the 300 SRT’s three year/100,000km warranty is now well off the pace.

Yes, it includes corrosion cover and 24-hour roadside assistance, but with the likes of Ford, Holden, Honda, Mazda, and Toyota now at five years/unlimited km, Chrysler is way behind.

Kia moved to seven years/unlimited km in 2014, and there are whispers of the Korean brand shifting to 10 years sooner rather than later.

Service is required every 12 months/12,000km, and no capped price servicing program is currently offered.

With the caveat that labour rates will inevitably vary between dealerships, Chrysler Australia estimates five year standard servicing cost at $2590 (including GST).

As with all Mercedes-AMG models, the GLS63 comes with a five-year/unlimited-kilometre warranty, which currently sets the standard for the premium market. It also comes with five years of roadside assistance.

The GLS63’s service intervals are relatively long, at every 12 months or 20,000km (whichever comes first). Better yet, it’s available with a five-year/100,000km capped-price servicing plan, but it costs $4450.