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2026 Mercedes-AMG GLS 63

SUV · 4.0L V8 Biturbo · AWD

85/100

AutoVault's overall score, weighted for what a suv is actually for — performance, technology, comfort, reliability, safety and value.

Specifications

Engine4.0L V8 Biturbo
Horsepower603 hp
Torque627 lb-ft
0–60 mph4.1 sec
Top speed174 mph
DrivetrainAWD
Seats7
Combined MPG16 mpg (14 city / 20 hwy)
Range286 miles
MSRP$154,200
Body styleSUV

The verdict

What's good

  • Three rows plus genuine sports-car pace
  • Limo-quiet, cushioned ride
  • Thunderous V8 soundtrack
  • First-class second-row comfort

What's not

  • Enormous to maneuver and park
  • Third row tight for adults
  • Pricey scheduled servicing
  • Heavy on its brakes when hustled

The engine

M177 / M178

4.0L Twin-Turbo V8

AMG's hand-built 4.0-liter 'hot-vee' twin-turbo V8 is the soul of modern Affalterbach — thunderous, hard-hitting, and endlessly characterful, from the GT sports car to the G63 and 63-badged super-saloons.

Each engine is assembled start-to-finish by a single technician under AMG's 'One Man, One Engine' philosophy, the builder's name fixed to the cam cover on a signature plaque.

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