Ineos Grenadier vs Mercedes-Benz GLS-Class

What's the difference?

The Ineos Grenadier Station Wagon is an impressive four-wheel drive. This five-seat off-roader is stacked with features, is very capable off-road and it's actually not atrocious on-road. But its price will deter a lot of people and those who buy into the Grenadier lifestyle have to be prepared to endure some compromises and discomfort along the way… because this is not for everyone. And that’s kind of the point.

This is a new old-school 4WD – a niche within a niche – and while it’s bursting at the seams with an abundance of quirky features, those quirks may quickly lose their appeal and become annoyances. A lot of people will buy the Grenadier because they like the idea of it, but the reality of living with it day to day – or any old-school 4WD, for that matter – may be uncomfortable for them, similar to all of those people who bought a camper-trailer during COVID only to realise they hated camping.

When all is said and done, the Grenadier is a retro-cool 4WD with solid off-road capability.

The GLS450d impresses as an entry-level grade, as it’s a more family-friendly allrounder than the specialised AMG and Maybach variants. Its combination of a torque-rich diesel 48V hybrid drivetrain, air-cushioned suspension and plush interior are as well suited to luxury urban travel as they are to grand touring, where its heavy towing and generous load-carrying capabilities can shine. Whether it’s worth around $200K drive-away, only those who shop at the top end of town can decide.

In terms of its design, you're either going to love the Grenadier or not. This is a big, tall, chunky four-wheel drive, with plenty of presence about it and if that’s your cup of tea you’re in luck.

This Grenadier is 4855mm long (with a 2922mm wheelbase), 1930mm wide, 2050mm high and a listed kerb weight starting from 2150kg, depending on how many accessories you have onboard.

In Trialmaster guise, this Grenadier has a raised air intake, sidesteps, big steel wheels and all of the sort of stuff that screams, "Hey, look at me. I'm an off-roader!”.

The interior is spare enough to retain the spirit of adventure the Grenadier so wants to conjure but with plenty of comfort and features on offer (more about those aspects in the next section).

But the Recaro seats, the profusion of buttons, knobs and dials, and this 4WD’s abundance of quirky design cues, all more than a bit of a novelty, combine to set this interior apart from the mainstream 4WD market.

It’s a military-style cockpit, but in a good way; this is a snug cabin replete with textured surfaces and durable materials, and again the dash and ceiling are seemingly peppered with controls.

So, in the design stakes, the Grenadier has it all over most rivals, except perhaps the Toyota LandCruiser 76 Series wagon, which also exudes old-school cool.

This is an imposing vehicle in extravagant S-Class tradition, riding on an expansive 3135mm wheelbase and stretching more than 5.2 metres (5215mm) long and more than 2.0 metres (2030mm) wide with a turning circle that's nudging 13 metres.

However, it’s just under 1.8 metres (1798mm) tall, so there’s no clearance issues when accessing multi-storey carparks. And with its side-steps (or ‘running boards’ in nostalgic Benz speak) most adults can step rather than climb aboard, although passengers of shorter stature during our test noted that assist handles on the A and B pillars would be handy.

Central to its sophisticated chassis design is adaptive air suspension, which uses a pneumatic or ‘airbag’ form of springing with adaptive damping to continuously optimise ride comfort and handling response according to road conditions and driving dynamics (see Driving).

The GLS’s styling is clean and uncluttered with tasteful restraint evident in its chrome and satin-chrome highlights, yet it projects a majestic quality with its prominent four-louvre grille and elegantly spoked alloy wheels.

The spacious and sumptuous seven-seat interior is visually pleasing and practical, with a subtle blend of surface treatments, contrasting tones, lots of soft-touch surfaces and exposed stitching. This is combined (thankfully) with physical dials, switches and ‘piano key’ buttons to control numerous interior functions, in preference to distracting touchscreen prompts.

There is a lot to like about the Grenadier cabin when considered through a lens focused on practicality and comfort.

I’ve revised my opinion on the Grenadier’s all-around practicality since I last tested the Quartermaster Trialmaster and, as a result, have uprated it from 7.0 to 8.0 – but it’s important to note here that our test vehicle is equipped with plenty of extra-cost add-ons which have helped bolster the cabin’s rating.

The interior is set up for the messiness of day-to-day life, with an abundance of hard plastic and other durable surfaces everywhere. Its big chunky rubber mats all cop a bit of a beating, but remember those come at an extra cost ($381, at time of writing).

The seats in the front and back – all Recaro – are comfortable, as you get plenty of room everywhere, and while the control panel is a bit of a confusion of dials and knobs and buttons, if you give yourself a time to get used to it you should be fine.

The Grenadier Station Wagon is a five-seater and with all five seats in use, there is a fair amount of space at the back for all of your gear. I had my vehicle-recovery gear in here, MaxTrax, two air compressors and there's plenty of space available.

The rear cargo space has a durable, hard plastic floor and that cargo area is equipped with movable tie-down points in the walls and fixed tie-down points on each wall and a 12-volt socket.

It's made for real life, it’s ready for dirt and mud and mess, so it's not too bad. For all-round robust practicality, the Grenadier bests its rivals.

Although it has a hefty 2655kg kerb weight, our test vehicle’s 3420kg GVM rating provides a useful 765kg of load capacity, which should comfortably absorb the combined weight of up to seven occupants and light luggage. Or with the third row of seating folded, five occupants and heavier luggage.

It’s also rated to tow up to 3500kg of braked trailer and with its sizeable 6920kg GCM (or how much weight it can legally carry and tow at the same time) it can carry its maximum load while towing its maximum trailer weight.

So, that’s commendable practicality, given it would be well suited to owners that need to tow large caravans, boat trailers, horse floats etc in style without having to compromise much (if at all) on either passenger numbers or luggage capacity.

Driver and front passenger space and comfort is exceptional, as you’d expect. Storage includes a large glovebox plus a bottle holder and bin in each door. The front of the centre console has two USB-C ports, wireless phone charging and heated cupholders, while the rear of the console has a large storage box with a third USB-C port and padded lid that doubles as a comfy elbow rest.

Even tall passengers in the second row of seating enjoy spacious comfort, given I’m 186cm and with the driver’s seat set in my position I have ample knee clearance, foot room and head space.

However, the central passenger must contend with a transmission tunnel in the floor and shoulder room would be squeezy for three large adults, which is okay for short trips but a maximum of two would be ideal for longer journeys.

The rear of the centre console also treats second-row passengers to a pair of USB-C ports, adjustable air-vents and a control panel that allows independent climate adjustment.

There’s also a large bin/bottle holder in each door plus storage nets on each front seat backrest. The centre seat backrest folds flat to allow long items (skis etc) to slot between the outer backrests. And it also serves as a fold-down armrest, containing two cupholders and a lidded slimline compartment that’s ideal for hidden phone storage.

The third row is uncommonly spacious, even for tall people, with padded armrests on each side containing cup holders and twin USB-C ports.

The carpeted rear luggage area has four load-anchorage points, a first aid kit and 12v socket. With the third-row seats upright it offers 355 litres of load volume, which increases to 1350 litres with the third row folded and 2400 litres (or 2.4 cubic metres) with both the second and third rows folded.

Our Polar White test vehicle, which is the base grade in the three-tiered GLS range, comes standard with a 3.0-litre inline six-cylinder turbocharged diesel engine with 48V mild hybrid technology, nine-speed automatic transmission, permanent all-wheel drive and active air suspension for a list price of $189,100.

This pricing is higher than comparative entry-level grades offered by the two marques which dominate sales leadership in this segment, comprising the BMW X7 xDrive40d M Sport ($179,500) and Lexus LX500d AWD ($158,700).

The GLS450d’s standard features include 22-inch AMG alloy wheels with Continental 325/40 R22 tyres and a collapsible spare, ‘AMG Line’ body styling enhancements, aluminium-look illuminated side-steps with non-slip rubber studs, multi-beam LED headlights and more.

Step inside the keyless interior and you’ll find ‘Hey Mercedes’ voice activation, fingerprint scanner (which memorises individual comfort settings for up to seven users), panoramic sunroof, heat-insulating dark-tinted rear privacy glass and the ‘Premium Plus Package’ that includes heating/cooling for the front seats, heated rear seats, head-up display, separate front/rear climate control zones, heated cupholders and more.

There’s also a concert hall-like Burmester surround sound system controlled by a central touchscreen with digital radio and Apple CarPlay and Android Auto connectivity, plus wireless phone charging, multifunction Nappa leather sports steering wheel and USB ports front and rear.

Driver assistance includes the ‘Parking Package’ (360-degree camera, active parking assist and transparent bonnet), ‘Mirror Package’ (auto-dipping rear-view mirror and electric folding door mirrors with puddle lamp projection of the brand logo) and ‘Driver Assistance Package’ (blind-spot assist, exit warning, speed sign recognition, lane keeping etc) all included as standard equipment.

Of course, Mercedes-Benz offers numerous extra-cost options including a 3500kg towing package plus interior, exterior, suspension and wheel enhancements (including Nappa leather trim) for those who want their GLS with the lot, which can easily push the list price beyond $200K.

The Ineos Grenadier Station Wagon Trialmaster is available with either a BMW 3.0-litre six-cylinder turbo-petrol engine (producing 210kW at 4750rpm and 450Nm at 1750-4000rpm) or a BMW 3.0-litre six-cylinder turbo-diesel engine – producing 183kW at 3250-4200rpm and 550Nm at 1250rpm-3000rpm.

Our test vehicle has the diesel. This Grenadier has an eight-speed ZF automatic transmission and a dual transfer case (high- and low-range 4WD), as well as a front, centre and rear diff lock – those are Trialmaster-level features.

This is a nicely refined engine-and-auto combination that does, however, take some urging to keep this big blocky beast on the move but, all in all, it offers a decent punch of torque across a wide rev range when needed while 4WDing.

It may not be overly slick or smooth, but the Grenadier’s engine and auto at least put it on a par with the likes of the Toyota LandCruiser 76 Series.

The GLS450d comes standard with a 3.0-litre turbocharged inline six-cylinder diesel producing 270kW of power at 4000rpm and 750Nm of torque between 1350-2800rpm.

This is paired with a 48V mild-hybrid system comprising a 48-volt battery (charged by regenerative braking) and an integrated starter-generator which provides both seamless engine stop-start and up to 15kW/200Nm of extra power and torque during acceleration.

A nine-speed torque converter automatic provides the choice of manual shifting using the steering wheel-mounted paddles, along with several selectable drive modes.

The active all-wheel-drive system continuously adjusts the engine’s torque delivery between front and rear axles (and individual wheels as needed) to maintain optimum traction and handling.

Fuel consumption for the Ineos Grenadier Station Wagon with the diesel engine is listed as 10.5L/100km, and that's on a combined (urban/extra-urban) cycle.

On this test, which included a lot of high- and low-range 4WDing, I recorded 12.2L/100km. 

This vehicle has a 90-litre fuel tank so, going by my on-test fuel consumption figures, from a full tank, you could reasonably expect a driving range of almost 740km.

The diesel Ineos Grenadier Station Wagon has a 17-litre AdBlue tank, which you’ll have to top-up as required.

None of its rivals are particularly impressive in terms of fuel efficiency, so the Grenadier holds it owns here.

Mercedes-Benz claims official combined consumption of 7.8L/100km and the dash display was showing 9.0 when we stopped to refuel at the completion of our 368km test, which included the usual mix of suburban, city and highway driving with up to five passengers at times and light luggage.

Our own figure, calculated from fuel bowser and tripmeter readings, was close at 9.5 which is outstanding sub-10L/100km economy for such a substantial vehicle in mostly metropolitan use. Therefore, based on our own consumption figure, you could expect a real-world driving range of around 950km from its 90-litre diesel tank.

There’s a pleasant surprise in store for you if you haven’t been in an Ineos Grenadier Station Wagon before. It's not terrible on road, it’s actually quite nice to drive.

Keep your expectations in check, though. This is after all a tall, blocky four-wheel drive wagon, so there is wind noise around the mirrors and the straight up-and-down windscreen and there is some tyre noise, especially from the Trialmaster’s BFG all-terrain tyres. But overall, it's not too bad.

You have to constantly make minor corrections in the steering to keep this chunky mongrel in line, and it takes some urging to get moving, but otherwise it is quite reasonable on sealed surfaces.

However, this one of those vehicles that is, of course, best exercised off-road. And the news is mostly good.

An impressive over-arching aspect about this vehicle is the fact you can drive it straight out of the dealership into some challenging 4WD-only terrain and you shouldn't have a problem as long as you drive it with consideration. This Grenadier is pretty much fully kitted out for hardcore four-wheel driving – or as close as you can get to it in a standard (albeit very well-equipped) off-roader.

The six-cylinder, as mentioned, works well with the eight-speed automatic transmission. It’s a punchy combination, but not over the top.

It has impressive low-range gearing, plenty of torque on tap, quietly effective driver-assist tech (including hill descent control), and, in this Grenadier, you have front, centre and rear diff locks, so all of those factors help to make this a willing and able four-wheel drive.

As well, off-road angles (36.2-degree approach, 36.1 departure and 28.2 ramp-over) all check out for a vehicle of this size. Ground clearance is a listed 264mm, wading depth is 800mm and if you happen to touch earth with the undercarriage of this vehicle it has solid underbody protection for such occasions. There are, however, some trade-offs worth noting.

The tweaked steering still lacks the pinpoint precision that is handy, especially when you're four-wheel driving. It has a very floaty ride on road because it is a big vehicle and it's more at home in a four-wheel drive scenario.

You have to drive this vehicle with plenty of mechanical sympathy, it has to be used with reasonable use in mind. This is after all $150,000 worth of rolling machinery and if you want to keep it as new, then you'd better drive it with care.

And, while that underbody is well protected, it needs to be because it’s quite vulnerable to tree roots, rocks, rocky steps and any other kind of natural hazard you may encounter in the bush.

Also, like any decent old-school-style four-wheel drive that's worth its salt, engaging the diff locks requires some patience, because it’s a process that has to be done in a strict sequence. First, engage the centre diff, then the rear and then the front. The diff lock buttons are on the ceiling control panel so give yourself time to get your head around it and you’ll be fine. This vehicle demands your attention because it is a real driver-focused experience, which is great.

If you plan to use your Grenadier station wagon as a tow vehicle, it’s handy to know its capacities are 750kg (unbraked trailer) and 3500kg (braked).

The Grenadier matches or betters its rivals in terms of on- and off-road driving.

It’s an enjoyable vehicle to drive, with multiple power adjustments for the seat and steering wheel combined with a large left footrest which provide supreme driver comfort and support.

The powerful and responsive turbocharged six-cylinder diesel and nine-speed auto are well suited to this application. The engine’s ample torque provides spirited acceleration from standing starts, taking only six seconds to reach triple-digit speeds.

This drivetrain would be well suited to heavy towing duties, given the 48V mild-hybrid system can contribute an extra 200Nm (in addition to the engine’s 750Nm), which raises the total theoretical torque output to almost 1000Nm.

The active air suspension provides a wonderfully cushioned ride that floats over bumpy roads, while maintaining excellent handling response and surprising agility. These commendable chassis dynamics, combined with the powerful and responsive drivetrain, makes the vehicle feel smaller and lighter than its dimensions and kerb weight would suggest.

Overall, it’s difficult to fault from a driver’s perspective, with the only exception being the voice activation function. This is often triggered by words or phrases other than ‘Hey Mercedes’ resulting in regular interruption of conversations. This needs some fine tuning.

The GLS does not have an ANCAP rating as it’s yet to be tested, but comes standard with a suite of passive and active safety features including nine airbags, auto emergency braking (AEB) with pedestrian detection and junction assist, blind-spot monitoring, traffic sign recognition, head-up display, rear cross-traffic alert, lane-keeping, adaptive cruise control with ‘distance assist’ (autonomously brakes/accelerates in heavy traffic), front/rear parking sensors, 360-degree camera and more.

There’s also two ISOFIX and three top-tether child seat anchorages in the second row, plus two more of each in the third.

The Ineos Grenadier Trialmaster Station Wagon is covered by a five-year/unlimited km warranty.

No capped price servicing is available and service intervals are scheduled for every 12 months or 15,000km, whichever occurs soonest, and total cost for the five years is $5992 for the diesel and $5832 for the petrol.

At time of writing, there are 16 approved INEOS Automotive dealerships in Australia.

If you buy a big 4WD you should expect big 4WD ownership costs, right? The Grenadier remains competitive with its rivals in this space.

The GLS comes with a five-years/unlimited km warranty (better than BMW and Lexus) and five years of roadside assistance. Scheduled servicing is every 12 months/25,000km whichever occurs first.

Mercedes-Benz offers capped-price pre-paid servicing packages with three, four or five-year terms. For example, the total upfront cost of the minimum three-year term is $4090, or an average of $1363 per service.