Mercedes GLS 450 Review: Luxury SUV Worth $100K?

content: The $100K Luxury SUV Question

Shopping for a three-row luxury SUV means confronting a critical question: Does the Mercedes-Benz GLS 450 justify its premium price? After analyzing this detailed review, I believe the answer hinges on what you prioritize. The GLS 450 delivers exceptional engineering and technology, but faces stiff competition on interior refinement and value. For buyers comparing this near-$100,000 vehicle against rivals like the BMW X7 or Audi Q7, understanding its true strengths and compromises is essential. Let's break down what makes this SUV stand out—and where it falls short.

Performance and Engineering Excellence

The GLS 450's turbocharged 3.0L inline-6 engine with mild hybrid assistance generates 362 horsepower and 369 lb-ft of torque. The integrated electric motor adds up to 21 hp and 184 lb-ft temporarily during acceleration. This combination creates a surprisingly responsive drive for a 6,000-pound vehicle. The 48-volt hybrid system handles accessories like air conditioning, reducing engine load.

Key performance observations:

• The standard air suspension delivers a "comfortable float" that maintains composure over bumps
• Massive 22-inch AMG wheels (285mm front/325mm rear) provide sports-car-level grip
• Acceleration feels stronger than specs suggest thanks to instant electric torque
• ECO mode's seamless engine start/stop is virtually undetectable

However, the brakes feel undersized for this mass. Sport mode eliminates throttle lag present in Comfort setting, but fuel economy remains modest at EPA-rated 18 city/24 highway mpg. The unavailable V8-powered GLS 580 and GLS 63 AMG models would better satisfy power seekers.

Technology and Luxury Features

Mercedes packs the GLS with innovative tech, though some features fell victim to 2022's chip shortage. The system's depth demonstrates Mercedes' engineering authority, but complexity may overwhelm some users.

Standout technology highlights:

• Seat Kinetics: Subtle seat adjustments reduce fatigue on long drives
• Smart Climate Control: Unique ability to heat and cool seats simultaneously
• Car Wash Mode: Automatically raises suspension, folds mirrors, and disables sensors
• MBUX Infotainment: Customizable digital dash layouts and head-up display zones
• Mercedes Me App: Offers geofencing, remote start, and crowd-sourced hazard alerts

Notable omissions due to shortages include wireless charging and wireless Apple CarPlay/Android Auto. The voice-activated "Hey Mercedes" assistant works well, though the sheer number of controls demands a learning curve. The ambient lighting with 64 colors remains an industry benchmark Mercedes pioneered.

Practicality and Interior Execution

With 17 cubic feet behind the third row expanding to 85 cubes with all seats folded, the GLS offers competitive cargo space. Its power-folding seats operate intelligently—front seats automatically adjust to allow second-row folding, then return to original positions. The optional six-seat configuration ($0) improves third-row access.

Critical interior observations:

• Third-row limitations: Fixed left-side second-row seat blocks exit options
• Material concerns: Hard plastic lower door panels feel out of place at this price
• Headrest hazard: Stiff manual third-row headrests can pinch fingers during adjustment
• Comfort plus: Available Nappa leather and four-zone climate control elevate comfort

While build quality inspires confidence (doors close with vault-like solidity), the design feels utilitarian compared to the plush BMW X7 or even the Hyundai Palisade's flair. The Maybach GLS 600 addresses this with superior materials at a $160K price point.

Value and Competitive Comparison

Priced from $77,850, our test vehicle reached $97,155 with options. This positions the GLS 450 above key rivals:

Model	Starting Price	Notable Advantages
Mercedes GLS 450	$77,850	Best tech, air suspension, hybrid smoothness
BMW X7	~$7K less	Richer interior materials, sharper handling
Audi Q7	~$15K less	Strong value, intuitive tech interface
Cadillac Escalade	Higher	More spacious, bolder styling

The verdict from our analysis: The GLS 450 excels in powertrain sophistication, ride comfort, and cutting-edge features. However, its interior doesn't feel special enough at this price, especially compared to the new Mercedes S-Class sedan. It's a compelling choice for tech-focused buyers, but those prioritizing cabin luxury may prefer rivals.

Luxury SUV Comparison Toolkit

Actionable steps before purchasing:

1. Test air suspension: Verify ride comfort over rough roads in your area
2. Measure third-row access: Try entering/exiting with your typical passenger load
3. Compare tech interfaces: Contrast MBUX with BMW iDrive at the dealership
4. Review ownership costs: Research long-term air suspension repair expenses
5. Price competitors: Get real offers on X7/Q7 using CarGurus' dealer network

Recommended resources:

• Mercedes-Benz GLS Owner's Manual (free download): Essential for mastering advanced features
• CarGurus Comparison Tool: Objectively compares pricing, specs, and local inventory
• Consumer Reports Reliability Data: Assesses long-term ownership satisfaction

Final Considerations

The Mercedes GLS 450 delivers a uniquely refined driving experience thanks to its hybrid-assisted powertrain and standard air suspension. Yet at nearly $100,000, its interior execution and value proposition face legitimate challenges from German rivals. For tech enthusiasts who prioritize innovation, it remains a compelling flagship. Those seeking traditional luxury may find better execution elsewhere.

What luxury SUV feature would most justify a $100K price for you? Share your deal-breakers below to help other shoppers.