Fiat Ducato vs Mercedes-Benz G-Class

What's the difference?

The latest Fiat Ducato, in MWB MR configuration with optional nine-speed auto, is a competent competitor in the 3501-8000kg GVM segment. Its class-leading two-tonne-plus payload rating would have considerable appeal for those who need to carry exceptionally heavy loads and we couldn’t find any major flaws in its design and performance. However, the warranty is short and there are niggling issues in terms of driver comfort, which if addressed would increase the Ducato’s appeal.

As per the 1979 original, the current G-Class is produced by Magna Steyr in Arnie’s home town of Graz in Austria. And many fundamental things haven’t changed since then. But clearly this EV monster’s exotic electric powertrain is a huge departure.

It retains impressive off-road ability and straight-line speed. But will it hit the mark with top-end luxury 4WDers? Short story, this thing is wild, and it will be irresistible for a likely narrow band of tech-focused ‘must have the latest and greatest’ buyers. Nothing like impressing friends and family with a tank turn.

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

The MWB MR's front-wheel drive chassis rides on a 3450mm wheelbase with 12.5-metre turning circle. It’s 5413mm long, 2050mm wide and 2539mm tall, so like numerous van rivals in this GVM class it can’t access shopping centre and underground carparks which typically have a 2.2-metre height limit.

Underpinnings are simple and rugged, combining coil-spring strut front suspension with a leaf-spring rigid-tube rear axle that’s well designed for heavy load-carrying, with compressible rubber cones between body and axle that provide a second stage of support. There’s also four-wheel disc brakes, power-assisted rack and pinion steering and ample hard-wearing black plastic protecting the most vulnerable areas of the bodywork from scrapes and dents.

A sealed steel bulkhead separates the cabin from the cargo bay, insulating driver and passengers from load area noise and doubling as a robust cargo barrier. Its sliding window is ideally positioned to allow the driver or passenger to make a quick over-shoulder glance to check that their load is secure. Leg room for the centre passenger is unusually generous, even for tall adults, which would be appreciated by a crew of three.

Interestingly, the rear barn-door windows are heated but there are no wiper/washers fitted. At first this appeared to be an oversight, but having driven the Ducato in heavy rain we were surprised at how spray-free the rear screens remained and how clean they were afterwards.

Our only gripes are that the driver’s left footrest is so short you can only rest your toes on it. It’s a shame the excellent full-length one that resides in the passenger footwell (which of course is the driver’s footwell in LHD models) can’t migrate across the cabin for RHD versions. Driver comfort would be further improved with more rake adjustment in the base cushion.

The small 5.0-inch infotainment screen also makes it difficult to see much detail in the vision provided by the reversing camera. The optional 7.0-inch screen would be an improvement here, but is only available as part of the Comfort and Tech Pack.

Okay, so Mercedes-Benz says, with a straight face, that “with the aim of optimising the vehicle’s aerodynamics” classic G-Class elements have been revised, including the reprofiled bonnet, ‘air curtain’ vents in the flares over the rear wheel arches, A-pillar cladding and the small spoiler on the edge of the roof.

At the same time, the 20-inch wheels are also claimed to be "aerodynamically optimised” and underneath, a 26mm underbody casing made from a mix of materials, including carbon-fibre (attached to the ladder frame with more than 50 steel screws), protects the battery from dust, dirt and rocks.

In ticking off the Edition One, car-spotters should look for black rims with blue brake callipers behind them, blue inserts in the exterior protective strips as well as black door handles and a new rectangular design box on the rear door for storing items such as charging cables, tools or snow chains. If you want a spare wheel, choose the standard model.

An optional black-panel radiator grille ($3800) features tinted lighting units as well as an animated LED light band and chrome surround. The light band can be activated as a running light or an animation when locking and unlocking the vehicle.

And it’s worth noting Mercedes-Benz and the car’s contracted manufacturer, Magna Steyr, have invested much time and many Euros in retaining the car’s classic handle and door lock design. G-Wagen owners will recognise its sound from several kilometres away.

Inside the G580 it’s clear this is one area where the G-Class has progressed enormously over the decades. It’s still quite upright in terms of the dash design, but you’re confronted by twin 12.3-inch screens, supporting the Mercedes-Benz user interface. 

All very high-tech, but that’s balanced by an old-school grab-handle for the front passenger to latch onto during off-road work. 

The signature turbine-style air vents are located within squared-off panels, and in the limited Edition One you have a blue fleck running through carbon-fibre inserts on the centre console, door cards and that front grab handle. In the standard car it’s a (very attractive) walnut open-pore wood rather than carbon.

A luxurious interior for sure.

The Ducato’s 2060kg kerb weight and 4250kg GVM results in a huge 2190kg payload rating which dwarfs rivals we've tested including the Mercedes-Benz Sprinter, Ford Transit and its Peugeot Boxer sibling. It's also rated to tow up to 2250kg of braked trailer but given that Fiat does not publish a GCM (Gross Combination Mass) number, we can’t confirm if it can tow that weight while carrying a full payload.

The cargo bay, with a competitive 11.5 cubic metres of load volume, has an unprotected load floor that’s 3120mm long and 1870mm wide with 1422mm between the wheel housings. Therefore, it can easily carry two 1165mm-square standard Aussie pallets or three 1200 x 800mm Euro pallets, held in place by eight sturdy load-anchorage points.

There’s also ample forklift access through either the rear barn-doors, which can swing open to 270 degrees with a combined 1562mm-wide opening, or the sliding side doors with their 1250mm-wide openings.

All doors and walls are lined to mid-height and the raised roof cavity allows even tall adults to stand inside without stooping. It also provides a large and very useful storage area over the driver’s cabin, which is ideal for stowing ropes, straps, load-padding etc.

There’s plenty of cabin storage too, with large-bottle holders and two levels of storage bins in each front door. The dashboard offers numerous open storage bins plus small-bottle/cup holders, a glovebox, large overhead map shelf and storage tray under the driver’s seat. The centre seat’s backrest also folds forward to reveal a handy work desk on the back of it, complete with a spring-loaded clip to hold documents in place, a pen holder and two more small-bottle/cup holders.

For the record, the G63 is just over 4.6m long and a little more than 1.9m wide with a 2890mm wheelbase. So, not huge, but its close to 2.0m height is hard to ignore. 

In the front there’s lots of breathing space, and in terms of storage you have generous bins in the doors with plenty of room for big bottles. Then there’s a centre armrest, which doubles as the top of a deep storage box housing a USB-C port inside. 

A sliding roller cover in the centre console reveals two cupholders, another two USB-C sockets, a 12-volt outlet and a wireless charging pad. Add in a big glove box and you’ve got plenty of options in terms of storage, power and connectivity. 

In the back, sitting behind the driver’s seat set for my 183cm position I’ve got tons of foot and legroom and, no surprise, lots of headroom.

There’s a fair bit of sculpting in the rear seat, which is as nice as it is unusual (makers often avoid bolsters on the rear seat as it makes the backrest harder to fold flat). And in terms of three-abreast accommodation, a smaller adult will be okay in the centre spot for shorter journeys. Three up to mid-teenage kids will be swimming in it.

Then, for practicality you again have generous bins in the doors. And if you need even more capacity, fold down the centre armrest which houses two different size cupholders. 

In the rear of the centre console you’ve got two USB-Cs, a 12-volt power outlet, individual climate control and directional vents.

There are map rockets on the front seatbacks and more air vents in the B-pillar. So, when it comes to comfort, powering up devices and storing ‘things’ you’re well taken care of.

The side-opening tailgate door opens from right to left, which isn’t ideal when parallel parked on the left hand side of the road, but boot volume is over 600 litres (VDA) with all seats upright, expanding to nearly 2000 litres with the 60/40 split-folding rear seat lowered.

There are multiple tie-down hooks, a netted pocket, two lights, a 12-volt outlet as well as a ‘ski-port’ door and sliding cargo cover to enhance practicality and security.

As mentioned earlier, the full-size spare in the standard model, but the Design Box replaces it on the Edition One, although Mercedes-Benz says it’s aiming to make a spare available as an option later in the year.

The new Mercedes-Benz G580 is priced at $249,900 and a more highly-specified limited Edition One version comes in at $299,900, both before on-road costs.

That’s a price territory where the BMW X5 and X6 M Competition ($244,900 & $250,900) as well as the Range Rover Autobiography ($233,961) live. Not to mention competition from the G580’s still available and appreciably pricier twin-turbo V8 Mercedes-AMG G63 stablemate ($365,900).

As you’d expect, the standard features list is substantial and the highlights are Burmester 3D Surround Sound audio (with digital radio), leather upholstery, keyless entry and start, a multi-function steering wheel trimmed in Nappa leather, power front seats with memory function, heated and cooled cupholders, and wireless smartphone charging. 

There’s also dual 12.3-inch driver instrument and central media displays, ambient lighting and adaptive LED headlights as well as Android Auto and Apple CarPlay.

As well as cosmetic changes, covered shortly, the Edition One steps up to ‘Silver Pearl’ and black Nappa leather trim (with blue contrast stitching).

There’s also a range of optional packages bundling up everything from exterior body elements to interior trim and additional multimedia, the latter especially for back-seaters. 

The ‘Night Package’ ($4300) includes black exterior mirror housings, black running boards and wheels as well as darkened exterior lights and a radiator shell that can be illuminated for an impressive profile while driving.

A ‘Superior Line Interior Plus Package’ ($14,500) brings full Nappa leather upholstery, ‘Active Multicontour Seat Package Plus’ and grab handles in leather. Then a ‘Manufaktur Exterior Package’ ($4100) finishes the roof, bumpers and wheel arches in ‘Obsidian Black’. 

But the one that will score you maximum brownie points with the kids is the ‘Interior Comfort Package’ ($8500), featuring a rear seat entertainment system, including two integrated 11.6-inch touch displays.

The all-new drivetrain features Fiat’s latest 2.3 litre four-cylinder turbo-diesel with Multi-Jet 2 electronically-controlled common rail direct injection, variable-vane turbocharging, intercooler and Euro 6-emissions compliance using AdBlue. It produces 130kW at 3500rpm and (in automatic models) 450Nm of torque which peaks at 1500rpm. In case you’re wondering, the red ‘180’ body badges denote European metric horsepower.

The new ZF nine-speed torque converter automatic is a sweet-shifting transmission which Fiat claims is designed to optimise the engine’s torque delivery and fuel economy. It has a sequential manual-shift function if required, which could be useful if hauling big payloads in hilly terrain, but works most efficiently when left alone.

The G580 is powered by four permanently excited synchronous motors, each delivering around a CLA200’s worth of power and torque to each wheel for overall outputs in excess of 432kW/1164Nm.

Each motor has its own two-stage transmission and power electronics for almost infinite fine-tuning of the direction and amount of drive sent to individual wheels. Merc calls it ‘individual-wheel drive’.

Fiat does not publish a combined average consumption figure for the Ducato, but the dash display was claiming 10.2L/100km at the end of our test, which covered almost 300km of which more than a third was with a heavy payload. We also had the auto stop-start function switched off. That consumption figure was very close to our own, calculated from fuel bowser and tripmeter readings, of 10.6L. So, based on our numbers you could expect a real-world driving range of around 850km from its 90-litre tank.

Housed in a torsion-resistant casing and embedded low down in its ladder-frame chassis, the G580’s 116kWh two-tier, liquid-cooled lithium-ion battery pack delivers a WLTP-rated range of 473km, or 567km on the more lenient NEDC scale.

‘Eco Assistant’ and ‘Range Monitoring’ functions provide continuous information on battery status, energy consumption and estimated range.

Maximum system capacity is 400 volts which enables 200kW DC charging, meaning a 10 to 80 per cent fill in as little as 32 minutes. Maximum AC charging capacity is 11kW.

Claimed energy use is 23.1kWh/100km, and we saw an average of 28.6kWh across urban and highway running on the launch drive program.

Not exactly a ‘green’ EV choice, then, but it’s worth noting a one-year Chargefox subscription is included to off-set the car’s energy appetite.

There’s a commanding view for the driver thanks to a panoramic windscreen and clear eye-lines to the truck-sized door mirrors. There’s also reasonable but cluttered vision through the central rear-view mirror, which is partly obscured by the centre seat’s headrest.

The cabin bulkhead is effective in all but eliminating cargo bay noise and engine/wind noise volume is commendably low even on the highway. The highest audible intrusion at those speeds comes from the front tyres, which is acceptable on smooth bitumen surfaces but increases on coarser grades.

Its leather-rimmed steering wheel is nice to use and thanks to the driver’s door moulding and fold-down in-board armrest, there’s evenly balanced elbow support to relieve strain on the neck and shoulders.

The engine and nine-speed auto transmission are well matched, providing energetic performance when prodded and crisp, decisive shifting. Long-legged highway gearing allows 100km/h at 1500rpm (which is also bang on maximum torque) and less than 1700rpm at 110km/h. Ride quality when empty or lightly loaded can get bouncy on bumpy roads, which is not unexpected from suspension with a two-tonne-plus payload capacity.

Our main criticism is insufficient rake adjustment in the driver’s seat base cushion. There’s not enough angle available to stop the driver sliding forwards, requiring constant repositioning that becomes tiring after a while. More rake in the base cushion, combined with a decent-sized left footrest, would solve this issue.

Also annoying is the audible lane-departure warning, which is too loud and sounds like you’re being zapped by a ray-gun in an old sci-fi movie if you step out of line. A less confronting warning would be welcome.

So, with 432kW and around 1160Nm, even though the G580 weighs in at around three tonnes, you’re talking 0-100 km/h in 4.7 seconds. And this car gets up and goes… like a beast.

What you don’t get is that traditional Merc-AMG G63 V8 rumble, because, of course, no engine. 

But you do get what Mercedes calls ‘G-Roar’, essentially a sound bar at the front of the car also using the audio system inside to give it what is not exactly an engine noise but some sense of the car progressing. And you can turn it off for completely silent running.

‘Electric Dynamic Select’ changes the parameters of the motors, transmission, suspension, ESP and steering as required. On-road that means ‘Comfort’, ‘Sport’ and ‘Individual’ modes, with off-road comprising ‘Trail’ and ‘Rock’. In the Comfort setting drive flows primarily to one axle for optimum energy efficiency.

Suspension is by double wishbones at the front and a De Dion-style live (rigid) axle at the rear. You’ve got the same adaptive-type set-up as per other G-Class models, so ‘Comfort’ and ‘Sport’ modes and of the many traditional G-Class traits this car exhibits, ride quality is one of them.

Even in Comfort you’ll find even little bumps and thumps making their way up into the seat of the pants and the cabin. It is after all a body-on-frame, ladder-chassis type vehicle and that’s not unusual.  

In terms of steering, it’s accurate and road feel is good. You’ve got 275-wide Falken Azenis FK520 tyres that are more on- than off-road focused. The car feels stable and nicely planted on the road.

The physical brakes are by ventilated discs front and rear, and the big rotors are the same size (353mm) all around. They work nicely and feel like a conventional set-up.

Regenerative braking kicks in as soon as you lift off the accelerator pedal. The powertrain is harvesting energy as the car decelerates and there are four levels you can adjust with the steering wheel paddles up to a quite aggressive level - not quite, but close to a single-pedal set-up.

Off-road, the G580’s ‘G-Steering’ system allows the wheels to turn at different speeds to induce slight ‘drift-like’ oversteer and tighten the turning circle. It works beautifully and the car’s fording depth is 850mm, a full 150mm more than internal-combustion G-Class models.

A three-speed off-road crawl function is adjustable to speeds as low as 2.0km/h, and the car is claimed to remain stable on sideways slopes up to 35 degrees. 

Torque vectoring is used to create ‘virtual diff locks’ and there’s a ‘low-range’ setting. Switch to the ‘Offroad Cockpit’ and data including gradient, lateral inclination, compass readings, tyre pressures and the selected G-Mode appear.

A ‘Transparent Bonnet’ function creates a virtual view of what’s approaching and passing under the front wheels to help the driver pick their way through steep ascents or declines.

For the record, the G580’s approach angle is 32 degrees, departure is 30.7, breakover is 20.3 and ground-clearance is 250mm.

And of course, with the wheels independently powered, the G580’s signature move is what Mercedes-Benz calls a ‘G-Turn’ but the rest of the world calls a tank turn.

If you encounter an obstacle that makes forward progress impossible, the system spins the left- and right-hand wheels in opposite directions so this brute can turn on the spot like an M1 Abrams. You can’t help but crack up laughing when executing this extreme party trick!

In terms of miscellaneous observations around ergonomics and the car in general, it has a 13.6-metre conventional turning circle. So if you’re not using the G Turn function in the car park be ready for a sizeable turning arc.

Also, those aero tweaks here and there seem to have had an effect. Wind noise, especially for such an upright, squared-off design is surprisingly modest. And overall, from a build point of view, this car feels as though it’s been carved from a solid piece of metal. In every aspect it presents as a quality item.

Although the Mercedes-AMG G63 carries a maximum five-star ANCAP safety assessment from 2018, the pure-electric G580 is unrated. But crash avoidance tech includes active cruise control, ‘Active Steering Assist’, high-speed AEB, traffic sign recognition, lane-keeping assist, blind-spot monitoring, driver fatigue monitoring as well as a 360-degree camera view and ‘Active Parking Assist’.

And if a crash is unavoidable, there are no fewer than 11 airbags on-board, including driver and front passenger front and side, rear side, full-length curtains, driver and passenger knee and a front centre bag.

There are three top-tether points for child seats across the second row, with ISOFIX anchors on the two outer positions.

Three years/200,000km warranty looks undercooked compared to the five years/unlimited km offered by some rivals. Scheduled servicing, though, is excellent for hard-working vans at 48,000km/12 months whichever occurs first. Five years of Fiat Professional servicing, based on a total distance of 240,000km, equals $6756.99 or an average of $1351.40 per year.

The G580 is covered by Mercedes-Benz Australia’s five-year/unlimited-km warranty, which remains the standard offering in the premium part of the market and an eight-year/160,000km drive battery warranty.

Service intervals are every 12 months or 20,000km with service plan pricing available over three ($2645), four ($3980) and five ($4670) years. In approximate terms, each workshop visit will cost ‘around’ $900. Not exactly cheap, especially for an EV, but this is no ordinary electric vehicle.