The 2014 Mercedes-Benz Trucks GL350 sits in the modern luxury SUV era where long-distance comfort, all-weather confidence, and substantial curb presence all shape the ownership experience. It is a vehicle buyers often keep in refined road-going condition rather than turning into a pure restoration project, so tire choice usually centers on preserving the right stance and everyday usability. For this GL350, the key fitment question is confirming whether the vehicle is running 275/55R19 or 275/50R20 radial tires. Both are modern metric radial sizes, and the decision starts with wheel diameter rather than construction type. Once that is confirmed, attention can shift to maintaining the correct proportions and overall fitment.
Which Tire Size Is Right for The 2014 Mercedes-Benz Trucks GL350
The 2014 Mercedes-Benz Trucks GL350 uses two primary tire sizes, and the difference comes down to wheel diameter rather than bias-ply versus radial construction. Both sizes are radial, but one fits a 19-inch rim and the other fits a 20-inch rim, so the first step is confirming which wheel setup is actually on the vehicle before comparing tire choices.
A 275/50R20 tire uses a 275-millimeter nominal section width, a 50-series aspect ratio, radial construction, and a fitment for a 20-inch rim. On the 2014 Mercedes-Benz Trucks GL350, this size supports the larger wheel setup while keeping the overall tire diameter close to the alternate 19-inch fitment. Its modern metric radial format will be familiar to current SUV owners and tire shops, making comparison straightforward. This is the size to evaluate if the vehicle already wears 20-inch wheels and you want to preserve its existing wheel-and-tire proportions.
A 275/55R19 tire uses a 275-millimeter nominal section width, a 55-series aspect ratio, radial construction, and a fitment for a 19-inch rim. For the 2014 Mercedes-Benz Trucks GL350, this size provides nearly the same overall diameter as the 20-inch option, but it is matched to a different wheel diameter. That makes the tire decision less about profile preference and more about matching the actual wheel on the vehicle. This is the correct size to investigate if the GL350 is equipped with 19-inch rims and you want to retain its intended fitment relationship.
Fitment is straightforward here because the covered sub-model uses the same two radial tire sizes already associated with the 2014 Mercedes-Benz Trucks GL350. The important step is still verifying whether the vehicle has 19-inch or 20-inch wheels before selecting a replacement tire.
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2014 Mercedes-Benz Trucks GL350 Bluetec 4Matic
The 2014 Mercedes-Benz Trucks GL350 Bluetec 4Matic uses the GL350's two modern radial fitments, so tire selection begins with confirming the wheel diameter on the vehicle. Once that is settled, the goal is matching the correct metric size to maintain proper proportions and clearance.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Frequently Asked Questions
These FAQs focus on the real tire decisions for a 2014 Mercedes-Benz Trucks GL350: identifying the correct size, matching the wheel diameter, understanding the modern radial sizing, and checking fitment, condition, and vehicle setup before road use.
Tire Size & Fitment
What tire size fits a 2014 Mercedes-Benz Trucks GL350?
A 2014 Mercedes-Benz Trucks GL350 uses either 275/50R20 or 275/55R19 tires. Both are radial sizes, and both are correct fitments for this model depending on the wheel setup on the vehicle.
The key is not choosing between two constructions, but matching the tire to the actual rim diameter. Check the wheel before ordering, because a 19-inch tire and a 20-inch tire are not interchangeable even though the two sizes have very similar overall diameters.
What size rim does a 2014 Mercedes-Benz Trucks GL350 use?
The 2014 Mercedes-Benz Trucks GL350 uses either a 19-inch rim or a 20-inch rim, depending on which tire size is on the vehicle. The 275/55R19 size fits a 19-inch wheel, while the 275/50R20 size fits a 20-inch wheel.
That rim diameter difference is the first thing to confirm before shopping for tires. Looking only at tread width can be misleading here, since both sizes use the same 275-millimeter width but require different wheels to mount properly.
Why does the 2014 Mercedes-Benz Trucks GL350 have more than one tire size?
The 2014 Mercedes-Benz Trucks GL350 has more than one tire size because it was fitted with different wheel diameters. One setup uses 275/55R19 tires on 19-inch rims, and the other uses 275/50R20 tires on 20-inch rims.
Since the overall diameters are close, the main fitment distinction is wheel size rather than a dramatic change in vehicle stance. That means the correct replacement depends on what is actually installed on the SUV today, especially if wheels have ever been changed.
Choosing the Right Tire
What should I consider when choosing a 275/50R20 tire for a 2014 Mercedes-Benz Trucks GL350?
Start by confirming that the GL350 is actually equipped with 20-inch wheels, because 275/50R20 is tied specifically to that rim diameter. The size itself indicates a modern radial with a 275-millimeter section width and a 50-series profile.
Once the wheel diameter is confirmed, compare the tire's intended use with how the SUV is driven. A road-focused GL350 benefits from staying close to the established size, while any wheel, suspension, or body changes should be checked carefully for clearance before installation.
What should I consider when choosing a 275/55R19 tire for a 2014 Mercedes-Benz Trucks GL350?
A 275/55R19 tire is the correct choice only for a 2014 Mercedes-Benz Trucks GL350 running 19-inch wheels. It is a modern radial size with the same nominal width as the 20-inch option, but it uses a taller sidewall profile to work with the smaller rim.
That means the decision is mainly about matching the wheel already on the vehicle, not selecting a different construction type. Verify the actual rim size, then inspect for any non-stock wheel or suspension changes that could affect fit, ride height, or steering clearance.
How do I choose between the available tire sizes for a 2014 Mercedes-Benz Trucks GL350?
Choosing between the tire sizes for a 2014 Mercedes-Benz Trucks GL350 starts with one simple fact: 275/55R19 belongs on a 19-inch wheel, and 275/50R20 belongs on a 20-inch wheel. The two sizes are not alternatives for the same rim.
Instead of treating this as a preference decision, treat it as a wheel-confirmation step. Read the size on the current tire or verify the wheel diameter directly, then replace the tire with the matching size unless the vehicle is being intentionally reconfigured with appropriate wheel and fitment checks.
Restoration & Appearance
Does correct tire fitment matter for a 2014 Mercedes-Benz Trucks GL350 restoration or preservation project?
Yes. Even on a modern collector-bound SUV like a 2014 Mercedes-Benz Trucks GL350, correct tire fitment matters because the tire size influences stance, wheel-fill, and how the vehicle presents visually. The GL350 uses either 275/55R19 or 275/50R20 depending on its wheel setup.
Preservation-minded owners usually benefit from keeping the wheel and tire relationship consistent with the vehicle's existing configuration. If appearance accuracy is especially important, confirm the wheel diameter currently on the SUV and review marque-specific references before changing to a different wheel-and-tire combination.
How does tire size affect the appearance of a 2014 Mercedes-Benz Trucks GL350?
Tire size has a visible effect on a 2014 Mercedes-Benz Trucks GL350 because the vehicle uses two fitments tied to different wheel diameters. A 275/55R19 combines the same nominal width with a taller sidewall, while a 275/50R20 pairs that width with a shorter sidewall on a larger rim.
Those differences can subtly change how much wheel is visible and how the SUV sits visually, even though the two overall tire diameters are close. Owners concerned with preserving the current look should match the installed wheel size rather than selecting by width alone.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2014 Mercedes-Benz Trucks GL350?
Yes. Modifications can affect tire fitment on a 2014 Mercedes-Benz Trucks GL350, especially if the vehicle has aftermarket wheels, altered suspension height, or body changes around the wheel openings. Even when staying with 275/55R19 or 275/50R20, those changes can alter clearance.
A GL350 that has been lowered, lifted, or fitted with different wheel offsets should be checked at full steering lock and through suspension travel. Matching the original size code alone is not always enough once the wheel or chassis setup has been changed.
What should I inspect before driving a 2014 Mercedes-Benz Trucks GL350 on new tires?
Before driving a 2014 Mercedes-Benz Trucks GL350 on new tires, confirm that the tire size matches the wheel diameter, then inspect inflation, bead seating, and visible clearance around the suspension and fenders. It is also smart to make sure all four tires are the intended size for the vehicle's setup.
A short, careful road test helps reveal any rubbing, vibration, or steering issues after installation. Rechecking pressure and visually inspecting the tires again after the first drive can catch mounting or clearance concerns before they turn into larger problems.
How often should tires on a 2014 Mercedes-Benz Trucks GL350 be inspected?
Tires on a 2014 Mercedes-Benz Trucks GL350 should be inspected regularly, not just when tread appears worn. Look over them before longer trips and during routine service intervals for pressure loss, uneven wear, cuts, bulges, and sidewall cracking.
That habit is especially important on vehicles that spend time parked or see irregular use, since age and storage conditions can affect tire condition even when mileage is low. Consistent inspections also help catch alignment or suspension issues that may show up first as unusual tire wear.
