Gac M8 vs Mercedes-Benz S600

What's the difference?

VS
Gac M8
Gac M8

$79,999 - $86,999

2026 price

Mercedes-Benz S600
Mercedes-Benz S600

2018 price

Summary

2026 Gac M8
2018 Mercedes-Benz S600
Safety Rating

Engine Type

Fuel Type
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Fuel Efficiency
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Seating
0

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Dislikes
  • Driver doesn't get a massage!
  • Power a bit lacklustre once EV switches off
  • Limited boot space

  • Some terseness from run-flat tyres
  • Controls could be simpler
  • Non L models not that spacious in the back
2026 Gac M8 Summary

The flagship GAC M8 PHEV Luxury we’re reviewing lives in a strange corner of the family car market. It’s a people mover, but it’s priced like a luxury SUV, designed like a VIP shuttle and powered by a plug-in hybrid system that suggests someone, somewhere, had very specific plans.

It finds itself up against the fully-electric LDV Mifa 9 and Zeekr 009, while also circling the upper end of the Kia Carnival range. The latter of which has proven itself to be the default choice for families.

Which begs the question - who is the GAC M8 actually pitched towards? Families with older teens or ageing grandparents feel like a more natural fit than those deep in the child-seat phase, largely because the M8 prioritises space, comfort and efficiency over the usual kid-wrangling conveniences.

At the same time, its chauffeur-like identity hints at a broader, more commercial audience and one more focused on quiet efficiency and passenger comfort. What can be agreed is the real point of difference here isn’t packaging or versatility, it’s the M8’s plug-in hybrid powertrain, and the way it reshapes where a people mover like this sits within the broader electrified landscape.

Does that approach make sense once you live with it? Let's find out.

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2018 Mercedes-Benz S600 Summary

Imagine a car that can pretty much drive itself, if you let it. And it’ll do that while you get a massage, pump some Beyonce, and enjoy the fragrance of a field full of flowers… And then, it can teach you to do stretches and exercises in the driver’s seat.

It may sound like fictional fiction, but it’s factual fact. And it’s the Mercedes-Benz S-Class 2018 model, which has taken the so-called ‘wellbeing’ of the driver to a new level.

The facelifted model has seen plenty of styling changes and some tech upgrades, and while making the flagship car in a particular brand’s line-up is often a task fraught with issues, the German company’s big, expensive, luxurious, limousine is undoubtedly a more thoughtful car for 2018.

But just remember, its predecessor was considered - at least for a little while - as the best car in the world by some automotive journalists. 

Now Mercedes-Benz has updated it, and it reckons it’s better than before, bringing a bunch of new technology, new engines, a reworked model range and, perhaps not essentially, but still pleasantly, lower pricing.

Read on to see how Beyonce factors into the equation.

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Deep dive comparison

2026 Gac M8 2018 Mercedes-Benz S600

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