2026 Mercedes-AMG GLS63 Review: The 603-HP Family Rocket You Never Knew You Needed

Mercedes-AMG GLS63

2026 Mercedes-AMG GLS63: Who said family SUV have to be boring? The 2026 Mercedes-AMG GLS63 laugh in the face of “practicality.” With a twin-turbo V8 pumping out 603 horsepower this seven-seater rocket ship hits 60 mph in just 3.6 seconds faster than most sports cars.

Sure it’s big, heavy and costs over $150,000, but once you feel that AMG grunt, you’ll understand why this beast is worth every penny.

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What is New for 2026?

Not much has change this year and that’s actually a good thing. The AMG GLS63 was already near perfect in 2025. Mercedes didn’t need to mess with success. You still get the same 48-volt hybrid-assisted V8 engine, the plush air suspension, and an interior that screams “executive luxury.”

Mercedes-AMG GLS63 review

Cost: Luxury Was Never Inexpensive

With a starting price of $152,200 the GLS63 is well into the six figure range. However few SUVs can equal the combination of technology, comfort and performance that you receive for that price.

 Suggested accessories:

  • Comfort & Warmth  Package: Essential for cold mornings are the heated front and second-row armrests.
  • Improved insulation for a whisper-quiet cabin is part of the Acoustic Comfort Package.

 Additionally, those 23-inch forged wheels are a flex worth every extra cash if you want to show off.

Engine & Performance: Supercar DNA in an SUV Body

The 4 liter twin turbocharged V8 engine produce 603 horsepower and 627 lb ft of torque under the hood. It comes with AMG tuned all-wheel drive and a 9-speed automatic transmission.

  • 60 mph to 0: 3.6 seconds
  • 12.0 seconds at 115 miles per hour
  • Maximum speed: 174 mph (stated)

It’s not exactly a corner-carving machine — that’s not the GLS63’s mission. Instead it’s a drag-strip dominator with unreal straight-line acceleration for a 6,000-pound luxury SUV.

Fuel Economy: Slightly Better, Still Thirsty

Thanks to update EPA testing the GLS63 gets a small bump in efficiency:

  • 15 mpg city / 20 mpg highway
  • Real-world highway test: 22 mpg

It even beats the less-powerful GLS580, so if you’re looking for a reason to justify the AMG, there you go!

Interior: Comfort Meets Craftsmanship

Step inside and you’ll immediately understand where your money went.

The inside of the GLS63 resemble a private jet more than an SUV. Real wood and brushed metal detail abound and almost every surface is covered in hand-stitched leather.

 Highlights:

  • Front-seat massage seat
  • Optional electric sunshades and heated second-row seats
  • Third-row seats are lovely to have but are best for children.
  • Capacity for cargo: 30 luggage when the seats are folded
Mercedes-AMG GLS63 interior

Tech & Infotainment: Smart and Stunning

The GLS63 comes loaded with Mercedes’ latest MBUX infotainment system — two massive 12.3-inch displays merge seamlessly for a futuristic look.

Features include:

  • Wireless Apple CarPlay & Android Auto
  • Built in Wi-Fi hotspot
  • Standard 13-speaker Burmester audio system
  • Optional 29-speaker 3D Burmester system for true audiophiles

Voice control works great, but let’s be honest — you’ll probably spend most of your time just admiring the gorgeous screens.

Safety & Driver Assistance

You’re surrounded by some of the most advanced safety tech in the business:

  • Automated emergency braking with pedestrian detect
  • Lane keeping assist
  • Adaptive cruise control with lane centering

Mercedes make sure you are protected whether you’re carving through city street or cruising down the Autobahn.

Warranty & Maintenance

Here’s where Mercedes falls a bit short.
You get:

  • 4 years / 50,000 mile limited warranty
  • 4 years / 50,000 miles powertrain warranty
  • No complimentary maintenance

Competitors like BMW and Audi still offer free scheduled maintenance, which makes this one area where AMG could improve.

Final Thought

A seven-seater supercar that strike a mix between business-class elegance and brutal force is the 2026 Mercedes-AMG GLS63. Although it’s not the softest SUV available, comfort suddenly seems less significant when you have 603 horsepower under your belt.

If you’ve got the budget and a taste for speed this is the ultimate family SUV.

FAQ’s

Q1: What is the high speed of the Mercedes AMG GLS63?

A: The GLS63 can go from 0 to 60 mph in 3.6 second which is astonishing for a full size SUV. 

Q2: What would it price?

A: It starts around $152,200 and as a fully load model can go over $170,000.

Q3: Is it worth it?

A: Absolutely If you are looking for supercar performance in an car that can carry the entire family then this is your ride.

Also Read: 5 Mid-Size SUVs With Insane Cargo Space You Won’t Believe Exist in 2025!