If you're searching for a 2019 Mercedes-Benz GLS 450 4MATIC for sale in Fontana, CA, your search ends here. American Fleet, located in Fontana in San Bernardino County, has this premium full-size luxury SUV ready for a test drive. With a twin-turbocharged V6 engine, all-wheel drive, and a cabin built for seven in first-class comfort, the GLS 450 represents one of the most capable and refined luxury SUVs on the market — and at a used price point that makes it even more compelling.

About This 2019 Mercedes-Benz GLS 450

At just under 76,000 miles, this 2019 GLS 450 4MATIC sits comfortably in its prime years of life. Mercedes-Benz builds these full-size flagships to last well beyond 150,000 miles with proper maintenance, meaning this SUV still has a tremendous amount of road ahead of it. For buyers in the Fontana area looking for a three-row luxury SUV that doesn't compromise on power, technology, or prestige, this GLS 450 checks every box. It's a vehicle that was engineered to compete with — and frequently beat — the Cadillac Escalade, Lincoln Navigator, and BMW X7 in terms of driving dynamics and interior refinement.

2019 Mercedes-Benz GLS 450 Performance and Engine

Twin-Turbocharged V6 Power

Under the hood sits Mercedes-Benz's acclaimed 3.0-liter twin-turbocharged V6 engine, producing 362 horsepower and 369 lb-ft of torque. This engine is paired with Mercedes-Benz's buttery-smooth 9G-TRONIC 9-speed automatic transmission, which delivers seamless, lightning-quick gear changes whether you're merging onto the 10 Freeway or climbing into the San Bernardino Mountains. The 4MATIC all-wheel drive system provides confident grip in all weather conditions — from rain-soaked Inland Empire highways to snowy mountain roads near Big Bear.

Real-world driving in this GLS 450 feels effortlessly muscular. The twin turbos eliminate lag and provide strong mid-range pull, making highway passing and on-ramp acceleration feel confident and composed. The SUV also carries a towing capacity of up to 7,500 pounds, making it practical for trailers, boats, or recreational vehicles.

Mercedes-Benz GLS 450 Features and Interior

A Cabin That Sets the Standard

The 2019 GLS 450 comes loaded with the kind of standard luxury features that other brands charge extra for. Expect genuine leather seating across three rows, a panoramic sunroof, heated and ventilated front seats, power-folding third-row seats, and Mercedes-Benz's COMAND infotainment system with dual display screens. The intuitive navigation system, Bluetooth connectivity, and premium sound system make every drive — whether it's across Fontana or across California — feel like a premium experience.

Driver assistance technology is equally impressive on this generation GLS. Active Brake Assist, Attention Assist, Blind Spot Monitoring, and Lane Keeping Assist all come standard. The 360-degree camera system and PARKTRONIC with Active Parking Assist make maneuvering this full-size SUV in tight parking situations surprisingly manageable.

Mercedes-Benz GLS 450 Reliability and Ownership

The GLS-Class has built a strong reputation for long-term durability when properly maintained. Owners consistently report that the 3.0-liter twin-turbo V6 is one of Mercedes-Benz's most robust powerplants, and the 9G-TRONIC transmission is known for smoothness and longevity. As with any German luxury vehicle, staying on top of scheduled maintenance — oil changes with the correct specification oil, transmission fluid intervals, and air suspension service — is the key to trouble-free ownership.

Common ownership tips for this generation GLS include monitoring the air suspension system for leaks over time and using Mercedes-Benz approved fluids. With its mileage sitting at a very reasonable 75,996, this particular GLS 450 is well within the range where buyers can expect years of reliable, enjoyable driving ahead. Many GLS owners in the Inland Empire and greater Southern California area report ownership well past 120,000 to 150,000 miles without major mechanical issues.

Why Buy From American Fleet in Fontana, CA

American Fleet, serving Fontana and the greater San Bernardino County area, has built its reputation on offering quality pre-owned vehicles at competitive prices. When you shop at American Fleet in Fontana, you're working with a team that understands the needs of local buyers — people who drive real miles on real Southern California roads and need a vehicle they can count on. The dealership prides itself on a straightforward buying process with no pressure and transparent vehicle history. Whether you're coming in from Rialto, Rancho Cucamonga, Ontario, or deeper into the Inland Empire, the team at American Fleet is ready to make your purchase experience smooth and stress-free.

Financing a Used Mercedes-Benz GLS 450 Near Fontana

Financing a pre-owned luxury SUV doesn't have to be complicated. American Fleet works with a network of lenders to help buyers throughout San Bernardino County secure competitive auto loan rates — whether you have excellent credit, are rebuilding, or are somewhere in between. Getting behind the wheel of a 2019 GLS 450 may be more affordable on a monthly basis than you expect, especially compared to buying new. Call American Fleet at 909-320-2027 to discuss your financing options or to get pre-qualified before you visit the showroom in Fontana.

Frequently Asked Questions

Is the 2019 Mercedes-Benz GLS 450 a good buy?

Yes. The 2019 GLS 450 is widely regarded as one of the best full-size luxury SUVs of its generation. With a powerful twin-turbo V6, a sophisticated 9-speed automatic, true three-row seating, and a suite of advanced safety features, it delivers a premium driving experience that holds up exceptionally well as a used vehicle purchase.

How many miles is too many for a used GLS 450?

A well-maintained GLS 450 can comfortably reach 150,000 miles or more. At 75,996 miles, this example is past its initial depreciation curve — which is great for the buyer — but still has a significant portion of its useful life remaining. Always request a full service history and consider a pre-purchase inspection for added peace of mind.

What does the GLS 450 4MATIC trim include?

The GLS 450 4MATIC includes Mercedes-Benz's permanent all-wheel drive system, a 362-horsepower twin-turbo V6, a 9-speed automatic transmission, three-row leather seating, panoramic sunroof, dual infotainment screens, active safety systems, and a host of driver assistance technologies. It is the performance-oriented starting point of the GLS lineup and includes the bulk of the features most buyers want.

Is the 2019 GLS 450 good for families?

Absolutely. The GLS 450 is purpose-built for family use at the highest comfort level. It seats up to seven, offers substantial cargo space with the third row folded, includes rear entertainment options, and carries top safety ratings. It's as practical as a minivan but delivers the road presence and driving excitement of a premium SUV.

Does the GLS 450 require premium fuel?

Yes, Mercedes-Benz recommends premium unleaded fuel for the GLS 450's 3.0-liter twin-turbocharged V6 to achieve optimal performance and engine longevity. While the engine will run on regular fuel in a pinch, sustained use of regular-grade gasoline can reduce performance and is not recommended by the manufacturer.

Serving Fontana and Surrounding Areas

American Fleet is conveniently located in Fontana in San Bernardino County, making it an easy trip for luxury SUV shoppers from throughout the Inland Empire and surrounding Southern California communities. Buyers regularly visit from Rialto, Ontario, Rancho Cucamonga, Colton, San Bernardino, Redlands, Loma Linda, Victorville, and Upland. Whether you're coming off the 10, the 15, or the 210, American Fleet is straightforward to reach. If you've been searching for a used Mercedes-Benz GLS 450 4MATIC near San Bernardino County, this is the dealership worth the drive.

Contact American Fleet Today

Don't let this 2019 Mercedes-Benz GLS 450 4MATIC sit on the lot for long — premium full-size luxury SUVs at this price point move quickly. Call American Fleet in Fontana, CA at 909-320-2027 to schedule your test drive, ask about current financing options, or get more information on stock number AF100838. The team at American Fleet is ready to help you drive home in the luxury SUV you've been searching for. Come visit us in Fontana and experience the GLS 450 for yourself.