Mercedes-Benz Trucks GLS350d Tires

Mercedes-Benz Trucks GLS350d uses two tire sizes in the 2017 model year: 275/55R19 and 275/50R20. Both are metric radial sizes, and the difference between them is not just sidewall height but also wheel diameter. The 275/55R19 fits a 19-inch rim, while the 275/50R20 fits a 20-inch rim.

That means the correct choice depends on the wheels actually installed on the vehicle. A quick visual impression is not enough, because these two sizes can look similar in width. Check the existing tire sidewall, confirm the wheel diameter, and then match the replacement tire to that exact size.

Mercedes-Benz Trucks GLS350d uses either a 19-inch or 20-inch rim in the 2017 listings. The two corresponding tire sizes are 275/55R19 for 19-inch wheels and 275/50R20 for 20-inch wheels. The final number in each size code gives the wheel diameter directly.

That rim diameter is the non-negotiable measurement in this fitment group. A tire built for a 19-inch wheel cannot be mounted on a 20-inch wheel, and the reverse is equally true. If the vehicle has changed hands or has aftermarket wheels, verify the wheel size physically rather than relying only on model-year assumptions.

A 2017 Mercedes-Benz Trucks GLS350d can show two tire sizes because the model was fitted with different wheel diameters. One setup uses 275/55R19 on 19-inch wheels, and the other uses 275/50R20 on 20-inch wheels. This is a wheel-size split rather than a bias-ply versus radial split or an old-versus-new era change.

The practical takeaway is that the year alone does not identify the correct tire. Owners should confirm which wheels are on the vehicle now, especially if it has been customized or refurbished. Once the wheel diameter is confirmed, the correct tire size follows directly from that measurement.

The most direct way to confirm tire size for a 2017 Mercedes-Benz Trucks GLS350d is to read the size on the existing tire and verify that it matches the wheel diameter on the vehicle. The two listed fitments are 275/55R19 and 275/50R20, so the deciding factor is whether the wheel is 19 inches or 20 inches in diameter.

It is also wise to compare the installed size with the vehicle placard and any factory wheel package information still with the vehicle. That extra check helps when a previous owner has changed wheels or tires. Matching the replacement to the actual wheel size is more important here than relying on the model name alone.

No product brand listings appear for Mercedes-Benz Trucks GLS350d in the available fitment set, so this page serves primarily as a size guide for the 2017 applications. The key confirmed facts are the two sizes themselves and their corresponding rim diameters: 275/55R19 for 19-inch wheels and 275/50R20 for 20-inch wheels.

When comparing brands elsewhere, start by narrowing the search to the exact size already confirmed on the vehicle. That prevents cross-shopping between the 19-inch and 20-inch fitments, which are separate applications. Once the size is fixed, factors such as tread design, load rating, and driving use become easier to evaluate.

No sidewall-style variations are listed here for Mercedes-Benz Trucks GLS350d, so the important fitment distinction remains size and wheel diameter rather than period-style sidewall appearance. The 2017 applications are both modern metric radial sizes: 275/55R19 and 275/50R20.

For a modern SUV application like Mercedes-Benz Trucks GLS350d, buyers typically focus first on correct sizing, service category, and overall intended use. Once the exact size is confirmed, sidewall appearance can be considered within the tires offered in that size. The vehicle will always need the correct 19-inch or 20-inch fitment before any styling preference matters.

A Mercedes-Benz Trucks GLS350d should be stored on clean, properly inflated tires and kept out of direct sunlight, standing water, and prolonged exposure to ozone sources such as electric motors or welders. If the vehicle will sit for long periods, a cool, dry indoor space is far better than outdoor storage. Keeping the vehicle clean and the tires free of petroleum contamination also helps preserve the rubber.

For longer storage intervals, move the Mercedes-Benz Trucks GLS350d occasionally so the tires do not rest on one contact patch for months at a time. Owners who keep the vehicle parked for extended periods may also benefit from adjusting storage loads and checking inflation more often. Good storage habits help both 19-inch and 20-inch fitments age more evenly.

Tires on a Mercedes-Benz Trucks GLS350d should be inspected regularly for pressure loss, sidewall damage, uneven wear, punctures, and age-related cracking. A monthly visual inspection is a sensible baseline for a vehicle that sees normal use, and an additional check before road trips is equally important. Because the model can carry either 19-inch or 20-inch fitments, confirming that all four tires match the intended setup is part of the inspection.

Regular inspection helps catch problems before they affect ride quality, handling, or safety. Pay close attention to shoulder wear and any signs of impact damage from potholes or curbs, especially on larger-diameter wheel packages. If wear patterns look irregular, alignment, balance, or inflation should be reviewed along with the tire condition.

Tires on a Mercedes-Benz Trucks GLS350d should be replaced when they show structural cracking, bulges, repeated air loss, impact damage, or any other age-related deterioration, even if tread depth still looks usable. Tread alone does not tell the full story of tire condition. A low-mileage vehicle can still have tires that have aged out of safe service.

That matters especially on a vehicle that may be used intermittently rather than driven every day. Owners should evaluate age, storage history, and overall condition together rather than waiting for the tread to wear away. When replacing, make sure the new set matches the vehicle’s actual wheel diameter so the correct 19-inch or 20-inch fitment is maintained.

A Mercedes-Benz Trucks GLS350d can be driven safely on public roads when it is fitted with the correct tire size for its wheel diameter and the tires are in sound condition. The listed sizes are modern radial formats, which are appropriate to a contemporary SUV application. Safety depends on correct sizing, proper inflation, and the overall condition of the tires already on the vehicle.

Before regular road use, check that all four tires match the intended fitment and that there is no visible age cracking, impact damage, or unusual wear. Mixing the 19-inch and 20-inch applications is not an option because they are built for different wheels. Roadworthiness begins with the right size and a careful condition check.

Before driving a Mercedes-Benz Trucks GLS350d, inspect tire pressure, tread condition, sidewalls, and any signs of puncture or damage. Confirm that the vehicle is fitted with either the full 275/55R19 setup or the full 275/50R20 setup as intended for its wheel package. A quick walkaround can reveal underinflation, cuts, or uneven wear that deserve attention before the vehicle goes on the road.

It is also wise to look for mismatched sizes, especially if the vehicle has had recent tire or wheel work. A mismatch can affect handling, braking feel, and overall stability. Taking a minute to verify condition and size consistency is one of the simplest ways to protect both the tires and the vehicle.

A Mercedes-Benz Trucks GLS350d should always be driven at speeds appropriate to the exact tires fitted, their condition, and the service category specified for that tire. The sizes listed here are modern radial sizes rather than early collector formats, but safe speed still depends on far more than the size code alone. Tire age, inflation, load, and wear all influence what is reasonable.

The practical rule is to avoid treating size alone as a guarantee of capability. Even a correct 275/55R19 or 275/50R20 can be unsuitable for sustained speed if it is old, damaged, or improperly inflated. Check the full tire specification and current condition before expecting normal highway performance from Mercedes-Benz Trucks GLS350d.