Mercedes-Benz GLS vs Audi E-Tron

What's the difference?

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 e-tron S looks mean, feels premium, and blends serious power with surprising grace under pressure. I still can’t shake the feeling I had with the standard e-tron, though, that this car is an Audi sports SUV first and an electric car second, and its weight holds it back from being as fun to drive as I think some rivals are.

If you love Audi and you want to go electric without stepping into something too unfamiliar it’s a great option. If you want an electric car which takes full advantage of what the next generation of technology can offer, keep an eye out, there’s plenty of fresh metal on the way.

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.

The e-tron S looks properly mean, with its adjustable ride-height suspension and enormous wheels combining nicely with the extra subtle sporty highlights to make for a squat SUV which clearly means business.

The width is especially evident with those accentuated wheelarches and the lines set by the lower wing to draw your eyes out to its edges. In profile it's easy to see its long wheelbase and tapered rear roofline, giving even the SUV a slinkier frame than you may be used to when looking at the comparatively boxy Q5.

The thing that strikes me about Audi’s e-tron range, though, is how little a departure it is. It ambiguously slots somewhere above the Q5 and below the Q7, but sticks very closely to the German brand’s styling script.

Sure, it looks a bit lower to the ground, and a bit meaner than you might expect for an EV, but it’s not as much of a departure as Jaguar’s I-Pace or BMW’s iX.

I suppose the biggest advantage here is nobody is going to say the e-tron’s overall visage is controversial, and certainly, it will appeal to existing fans of Audi’s design.

Inside it follows much the same theme, with all the key touchpoints and styling elements nearly identical to other Audis in the range, if not very similar.

It feels like a sensible, refined place in the cabin, with the only whacky pieces being the extra touchscreen for the climate unit and the strange thumb-operated shifter mounted on a floating piece which looks and feels like it could be the throttle control for a jet engine.

The dash is a bit more integrated and modern than in the conservative Q5 or Q7, with the air vents leading to the digital instrument cluster as part of an aesthetic three-terrace design which runs across the entire dash and into the doors.

The screens which appear in place of wing mirrors take a bit of getting used to. Aside from those notable departures, the interior continues the theme of sticking closely to the Audi formula, providing a more modern space which will still be familiar to existing fans of the brand.

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.

As an electric vehicle, the e-tron has certain advantages over its combustion equivalents, and overall makes for an accomplished family-sized SUV. But there are areas where more could be done to take advantage of its high-voltage features and abundant footprint.

Up front in the cabin is a good place, with both occupants treated to lavish seats with plenty of head and legroom, great adjustability, and plenty of width in the cabin.

The finishes are beyond premium with thick chunks of well-padded leather meeting your elbows, hands, and knees at every point. As always the lovely Audi switchgear exists in most places, but the removal of solid toggles and buttons in favour of an extra touch panel feels unnecessary.

There’s still a physical volume knob, and while the climate touchscreen is plenty large enough to have a shortcut button for every function without needing a sub-menu, it feels like you have to move your eyes too far from the road to know you’re going to jab it in the right spot.

Even the main touch panel has an interesting haptic feedback effect for each press, designed to mimic the solidly-sprung button hardware the brand has used in the past.

The screen looks amazing and is fast and sharp, key hallmarks of computer hardware that's up to the task, although the resolution is so high the touch elements when using Apple CarPlay end up being a little small and hard to stab at while you’re trying to keep your eyes on the road.

For storage there’s a big bottle holder and bin in the doors, a large cutaway with a storage tray, dual bottle holders, and power outlets in the centre, with a further smallish storage area under the armrest console.

Unlike some EVs there’s no huge cutaway under what was traditionally considered the transmission tunnel, although there is a small bay with the USB-C ports.

The rear seat feels good for space, with an almost flat floor and decent legroom and width, although headroom could be better.

There are netted pockets on the backs of the front seats and decently-sized bottle holders in the doors, with a further set in the drop-down armrest.

The quad-zone climate with its own touch panel and adjustable centre vents is a nice touch in the rear, as is the set of USB-C ports below. The hard backings to the front seats and built-in sun blinds our car had will even be great for kids.

The boot measures in at 660 litres, which is high for the segment. It fit our three-piece CarsGuide demo luggage set with room to spare, and that's despite the massive battery pack under the floor.

There’s auxiliary storage, too, with a further bay under the boot floor and a second small tray situated under the bonnet, both useful for keeping your charging paraphernalia.

A base, before-on-road costs asking price (MSRP) of $168,400 for the e-tron S in SUV form puts this sporty model a step above two of its most notable rivals, the Mercedes-Benz EQC (currently tops out at $141,300), and Jaguar I-Pace (currently tops out at $155,550), but below the menacing, full-fat BMW iX M60 (at $222,900), or the incoming updated Tesla Model X Plaid ($206,449).

To be fair here, only the iX M60 and Model X are pitched as performance variants in their respective ranges, with the Mercedes and Jaguar lacking either an AMG or SVR model respectively to represent their performance line-ups.

To that end, the e-tron S ups the ante when it comes to its power output with an impressive 370kW/973Nm across three motors, two at the rear, and one at the front. More on this in the Drivetrain part of this review.

Suffice it to say, it’s a lot of power. The e-tron is high-spec across the range, too, with the S scoring massive 21-inch alloy wheels, ‘Valcona’ leather interior trim, a heavily digitised cabin consisting of a 12.3-inch digital instrument cluster, 10.1-inch multimedia touchscreen, and a second 8.6-inch touch panel for the car’s climate functions.

The e-tron S also gets wireless Apple CarPlay and Android Auto connectivity, with matching wireless phone charger, built-in navigation, a 16-speaker Bang and Olufsen sound system, full LED lighting for the head and tail-lights and throughout the cabin, quad-zone climate control, heated front seats with power adjust, and a panoramic sunroof.

Finally, the S also has performance enhancing features like progressive (variable ratio) steering and adaptive air suspension.

Obviously, with the high level of standard gear, there’s not as much to put on the options list, although our car also had the weird $3500 ‘Virtual Exterior Mirrors’ which grant it concept-car like cameras with adjustable touch-panels inside the car in place of standard wing mirrors.

I don’t like these, but Audi says nearly half of all e-tron buyers are choosing them. More on this later.

There’s also the option to upgrade the car’s AC charger from 11kW to 22kW which could be very appealing if you have a public station nearby capable of putting out such power. This option will set you back a further $6900.

The last item on the list is the 'Sensory Package' ($9600) which bundles improved Matrix LED headlights in with soft close doors complete with puddle lamps, extended Nappa leather trim in the cabin, rear sunshades and heated rear seats. Our car had this option pack, too.

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.
 

The S-branded e-tron sets itself apart from the rest of the range with a seriously powerful set of three motors. There are two on the rear axle, and one on the front axle.

The total combined output of this collection is 370kW/973Nm, which for a combustion car, would be unprecedented.

To be fair, these figures are under a ‘boost’ mode, with the car generating a still strong 300kW/800Nm in most situations.

The three motor drivetrain allows for an electric version of Audi’s ‘quattro’ all-wheel drive system which the brand says can react to changes in 30 milliseconds and move torque appropriately.

The system is rear-biased, and in the name of efficiency the front motor is only used when required under acceleration or cornering.

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.

The e-tron may be electric, but it’s also a performance car. To that end, its energy consumption, relative to the field, is behind the pace.

In fact, at a whopping 27.8kWh/100km, driving the e-tron around feels like the electric equivalent of steering a big V8.

It produced one of the highest consumption numbers I have seen from any EV during my time with it. Considering this number is even below the WLTP consumption number, which is 28.4kWh/100km, that's not great.

For comparison, the Mercedes-Benz EQC's official number is just 20.8kWh/100km, while the Jaguar I-Pace consumes 21.2kWh/100km according to the WLTP procedure.

Yes, they aren’t performance cars in the same sense, but it’s still a big difference.

I made sure to take it out and stretch the e-tron’s legs to assess its performance in its more sporty driving modes, but the majority of my time with the car was spent in a more comfort-oriented setting and with the regenerative braking set to maximum.

Possibly as a result of its real-world consumption, my car was showing about 350km of range on a full charge, a little below the official WLTP number of 364km, although it is worth noting the enormous 21-inch alloys do their part to reduce the range. The car ships with 20-inch wheels in Europe.

The good news is the e-tron is capable of charging fast, with its max DC charging speed set at 150kW (allowing for a 5.0-80 per cent charge time for its 95kWh battery of 30 minutes), and its AC charging speed set at 11kW, which allows a slow-charging time of around seven hours.

If you intend to park on the street or live in a unit where installing charge infrastructure is impossible, I would strongly recommend you consider the 22kW AC charging upgrade which will cut the AC charge time in half.

While there are few public stations currently capable of the full 22kW in Australia, it will future-proof your car for ideal convenience charging for when they're more commonplace. 

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.

Does the e-tron live up to the promise set by sporty Audis which have come before it? The answer is interesting.

There is no doubt the e-tron S is rapid, at times absurdly so. If you stick it in the required S mode and hunker the suspension down, planting the accelerator makes its claimed 0-100km/h sprint time of 4.5 seconds suddenly very real.

It lurches ahead without so much as a squeak from its enormous tyres, grabbing the road with its front axle as it warps you forward.

So yes, this electric performance car is no doubt quick. It is also heavy. Weighing in at a tare mass of 2830kg, the e-tron S is quite literally massive.

The trouble is, while its powerful electric motors are great at overcoming this gravitational obstacle in a straight line, it’s in the corners and at low speeds where you feel every bit of it.

The e-tron crashes over larger bumps, it’s suspension struggling to deal with the combination of its weight and low-profile tyres, while it can also feel cumbersome in the corners around town.

The suspension is better at levelling things out once you gain a bit of pace, and the tyres work with the all-wheel drive system to put in a Herculean effort when carving up bends at speed, but there’s the ever-present lurch of weight always working against you.

This feeling isn’t helped by the steering tune, which even in its most comfort-oriented setting feels hefty and slow to turn. In the default sport mode, ‘dynamic’, it takes effort to push this car around corners.

Despite the unsettling feeling of it, though, the car holds on for dear life, and I never once felt as though the tyres were remotely in danger of breaking traction when put under pressure.

Is it a performer, then? Absolutely, there’s something mind bending about a vehicle so heavy going so quickly.

Does it feel fun to drive? Less so. I enjoyed the connectivity of the Porsche Taycan offers at speed more than I enjoyed the e-tron S, and its weight and girth demand a nice wide piece of tarmac for you to really wring it.

It’s far from a darty and engaging car like the Q5 can be despite its mammoth power outputs.

Elsewhere, the drive experience feels very Audi, though. The touchpoints and feedback are mostly familiar, as are the software and ergonomics.

The virtual wing mirrors are more of an inconvenience than anything else. This car is already hard to see out of, with big C-pillars and a tall belt line, and the digital exterior mirrors offer what feels like a limited angle of vision and make it extra hard to see out at night.

Some things fall to the wayside a little. The e-tron’s drive system almost hides the regenerative braking setting several menus deep, which, once activated, allows you to set it using the paddle-shifters on the wheel.

Audi says the regen will account for nearly 30 per cent of the car’s range, which is odd because even at the highest setting it feels a bit mild, relying on the user to manually operate the brake for a ‘blended braking’ mode to make up the difference.

It’s a bit of a stretch from the single-pedal driving modes offered on some rival cars.

My theory here, as with this car’s look and feel, is the e-tron is primarily designed to be familiar to an existing Audi customer, or someone coming out of a purely combustion premium rival.

The regular e-tron range is considered very safe by ANCAP which awarded it a maximum five stars with strong scores across all categories in 2019, although it does exclude the S which was not released at the time of testing. 

The S has the same suite of active safety features as the rest of the range, though, which includes freeway-speed auto emergency braking (up to 250km/h) with pedestrian, cyclist detection, and intersection assist, lane departure warning with lane keep assist, blind-spot monitoring with rear cross-traffic alert, adaptive high-beams, adaptive cruise control (with eco-assist and stop-and-go functions), as well as a clear exit warning.

The 360-degree camera suite is welcome, as is airbag coverage for the front, side for both front and rear rows, as well as curtains.

ISOFIX points feature on the rear outboard seats, and there are top tethers across all three rear seats.

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.

Audi has followed its Volkswagen parent in upgrading its warranty to five years and unlimited kilometres, finally leaving BMW and its three-year warranty behind.

The e-tron’s high-voltage battery components are covered by a separate eight-year and 160,000km warranty, but the big win, especially in this premium segment, is the first six years of servicing (covering three 24 monthly or 30,000km visits) is free.

Oh, and your public charging is largely free for the same period too, as Audi throws in a six-year ChargeFox subscription.

Six years pretty much cost-free? Audi, how far you’ve come.