The 2014 Mercedes-Benz Trucks ML350 sits in the modern luxury SUV era, blending everyday usability with the solid road manners and refined character buyers expect from an M-Class. For this exact model, tire selection starts with confirming whether the vehicle is riding on 19-inch or 20-inch wheels, because both 255/50R19 and 265/45R20 are used as primary radial fitments. That makes the real decision less about old bias-ply versus radial questions and more about matching the installed wheel diameter, maintaining the intended overall stance, and choosing a tire that suits how the SUV is driven and presented.
Which Tire Size Is Right for The 2014 Mercedes-Benz Trucks ML350
The 2014 Mercedes-Benz Trucks ML350 uses two primary tire sizes, and the correct choice depends first on wheel diameter. Both sizes are radial constructions, but one fits a 19-inch rim and the other fits a 20-inch rim, so identifying the wheel currently on the vehicle is the first step before comparing tire options, appearance, or ride priorities.
A 255/50R19 tire uses a 255 millimeter nominal section width, a 50-series aspect ratio, radial construction, and a 19-inch rim. On the 2014 Mercedes-Benz Trucks ML350, this is one of the standard modern radial fitments and suits vehicles equipped with 19-inch wheels. Its meaning is familiar to most modern tire buyers, but the important point is matching both the size and the wheel diameter already on the SUV. This size should be evaluated by confirming the existing wheel setup and keeping the vehicle's intended ride height and clearance relationship in mind.
A 265/45R20 tire has a 265 millimeter nominal section width, a 45-series aspect ratio, radial construction, and it mounts on a 20-inch rim. For the 2014 Mercedes-Benz Trucks ML350, this size applies to vehicles equipped with the larger 20-inch wheel package rather than the 19-inch setup. The slightly lower profile is part of what distinguishes it within the model's fitment range, so wheel confirmation matters before any replacement decision. This size is the one to consider when the SUV already wears 20-inch wheels and the goal is to stay with that established configuration.
Tire fitment is straightforward across the covered 2014 Mercedes-Benz Trucks ML350 sub-models because each one uses the same two radial size options. The key is not the trim name alone, but confirming whether the vehicle has 19-inch or 20-inch wheels before choosing replacement tires.
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2014 Mercedes-Benz Trucks ML350 4Matic
The 2014 Mercedes-Benz Trucks ML350 4Matic uses the same two primary radial fitments found across this model range. Tire selection comes down to verifying whether this particular SUV is on 19-inch or 20-inch wheels, then matching the correct size to the existing setup.
The 2014 Mercedes-Benz Trucks ML350 Base also falls within the shared two-size fitment pattern for this model. That means the practical step is checking the wheel diameter on the vehicle first, then selecting the matching radial size rather than assuming one size applies to every ML350.
The 2014 Mercedes-Benz Trucks ML350 Bluetec 4Matic uses the same pair of radial tire sizes as the other covered sub-models. Choosing correctly depends on confirming the installed wheel diameter, since both 19-inch and 20-inch setups appear on this version.
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 exact tire sizes used on the 2014 Mercedes-Benz Trucks ML350, how the 19-inch and 20-inch fitments differ, and what to check before replacement, modification, storage, or road use.
Tire Size & Fitment
What tire size fits a 2014 Mercedes-Benz Trucks ML350?
The 2014 Mercedes-Benz Trucks ML350 uses two primary tire sizes: 255/50R19 and 265/45R20. Both are radial tire fitments, and the correct one depends on which wheel package is installed on the vehicle rather than on a broad assumption that every ML350 uses the same size.
The most important next step is checking the actual wheel diameter on the SUV before ordering replacement tires. A 19-inch wheel requires the 255/50R19 size, while a 20-inch wheel requires 265/45R20, and mixing those up can create immediate mounting and fitment problems.
What size rim does a 2014 Mercedes-Benz Trucks ML350 use?
A 2014 Mercedes-Benz Trucks ML350 uses either a 19-inch or 20-inch rim, depending on the wheel setup on the vehicle. The 255/50R19 tire matches the 19-inch wheel, while the 265/45R20 tire is used with the 20-inch wheel configuration.
That rim diameter is the first thing to confirm because it determines which tire size can even be mounted. It also helps to verify the wheel width and any aftermarket changes, since replacement tires should match not only the rim diameter but the actual wheel and vehicle setup now in place.
Do all 2014 Mercedes-Benz Trucks ML350 sub-models use the same tire size?
The covered 2014 Mercedes-Benz Trucks ML350 sub-models share the same two tire size options: 255/50R19 and 265/45R20. That applies across the 4Matic, Base, and Bluetec 4Matic versions, so the fitment pattern is consistent at the sub-model level.
Even with that shared fitment range, the actual tire you need still depends on the wheels currently on the vehicle. A buyer should confirm whether the SUV has 19-inch or 20-inch rims, especially if wheels have been changed at some point or the vehicle was purchased used.
Choosing the Right Tire
What should I consider when choosing a tire for a 2014 Mercedes-Benz Trucks ML350?
Start with the correct primary size for the wheel already on the vehicle: 255/50R19 for a 19-inch rim or 265/45R20 for a 20-inch rim. Since both fitments are radial, the main decision is less about construction type and more about accurately matching the installed wheel package.
After size confirmation, compare the intended use of the SUV and the condition of the wheels and suspension. Daily driving, seasonal use, or a recently modified setup can all influence what should be checked next, especially clearance, ride expectations, and whether the vehicle still matches its original wheel dimensions.
How do I choose between 255/50R19 and 265/45R20 for a 2014 Mercedes-Benz Trucks ML350?
Choosing between 255/50R19 and 265/45R20 is not a matter of preference alone, because each size belongs to a different wheel diameter. The 255/50R19 is for 19-inch rims, and the 265/45R20 is for 20-inch rims, so the installed wheels decide which tire size belongs on the vehicle.
That means the best approach is to inspect the current wheel setup before comparing tires. If the ML350 has aftermarket wheels, a prior owner may have changed more than just the tire, so verifying rim diameter and the overall fitment relationship is more useful than relying on model name alone.
What rim-fitment details should I compare when choosing 2014 Mercedes-Benz Trucks ML350 tires?
The first rim-fitment detail to compare is diameter, because this ML350 uses either a 19-inch or 20-inch wheel. Tire size must match that exactly, with 255/50R19 paired to a 19-inch rim and 265/45R20 paired to a 20-inch rim.
Wheel width and any non-original wheel changes also deserve attention before replacing tires. An SUV that has been modified, lowered, or fitted with different offset wheels can have different clearance conditions than a stock example, so checking the actual wheel and fender relationship helps avoid preventable fitment issues.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2014 Mercedes-Benz Trucks ML350?
Yes, modifications can affect tire fitment on a 2014 Mercedes-Benz Trucks ML350 even when the tire size itself appears correct. Wheel changes, altered offsets, suspension lowering, and body or fender modifications can all change the clearance relationship around a 255/50R19 or 265/45R20 tire.
That is why the current setup should be inspected before replacement if the SUV is not known to be stock. A tire that matches the original wheel diameter may still need a closer look for steering clearance, suspension travel, and room at the fender edge once the vehicle has been altered.
What should I inspect before driving a 2014 Mercedes-Benz Trucks ML350 on new tires?
Before driving on new tires, confirm that the installed size matches the wheel diameter and that each tire is mounted and inflated correctly. It also makes sense to inspect the wheels for damage and check the suspension and alignment condition, since worn components can affect how a fresh set of tires behaves.
A short visual inspection is equally important after installation. Look for any rubbing marks, uneven stance, vibration, air loss, or contact near the inner wheelhouse and fender area, especially if the ML350 has replacement wheels or any changes from its original ride height and wheel setup.
How often should tires on a 2014 Mercedes-Benz Trucks ML350 be inspected?
Tires on a 2014 Mercedes-Benz Trucks ML350 should be inspected regularly rather than only at replacement time. Even on a modern SUV, pressure loss, tread wear, sidewall damage, and aging can develop gradually, particularly when the vehicle sees mixed use, long parked periods, or rough road conditions.
Routine checks are especially worthwhile before longer trips and after seasonal storage or infrequent use. A careful inspection for cracking, bulges, cuts, embedded debris, and uneven wear can catch problems early, and it also helps confirm that the vehicle remains properly aligned and the chosen tire size is wearing as expected.
