The 2015 Mercedes-Benz Trucks ML250 sits in the modern luxury SUV era, blending diesel efficiency, all-weather capability, and the upright road presence that made the M-Class a familiar choice for long-distance family and commuter use. For this exact model, tire selection starts with three radial sizes: 255/55R18, 255/50R19, and 265/45R20. That means the key decision is not bias-ply versus radial, but confirming which wheel diameter is actually on the vehicle. Once that is settled, the focus shifts to maintaining the intended balance of ride quality, handling response, overall tire proportions, and proper clearance on a stock or modified ML250.
Which Tire Size Is Right for The 2015 Mercedes-Benz Trucks ML250
The 2015 Mercedes-Benz Trucks ML250 uses three primary tire sizes, all in radial construction, and the correct choice depends first on wheel diameter. This model appears with 18-inch, 19-inch, and 20-inch rim fitments, so identifying the exact wheel setup on the vehicle matters before comparing tires. Once the rim diameter is confirmed, the decision becomes choosing the right metric radial size for the intended ride, appearance, and driving use.
255/50R19 is a metric radial size where 255 identifies the nominal section width in millimeters, 50 is the aspect ratio, R denotes radial construction, and 19 is the wheel diameter in inches. On the 2015 Mercedes-Benz Trucks ML250, this size suits a 19-inch wheel and keeps the fitment in a modern SUV tire format familiar to current replacement buyers. Its proportions place it between the 18-inch and 20-inch options used on this model. It is the right size to evaluate only after confirming that the ML250 is actually equipped with 19-inch wheels.
255/55R18 is a metric radial size with a 255-millimeter nominal section width, a 55-series profile, radial construction, and an 18-inch rim diameter. For the 2015 Mercedes-Benz Trucks ML250, this size belongs to vehicles running the 18-inch wheel setup rather than the larger wheel packages. Its overall diameter closely matches the 255/50R19 option, but the wheel diameter and sidewall profile are different, so the tire must match the actual rim on the vehicle. This size is the one to consider when preserving the intended fitment for an ML250 equipped with 18-inch wheels.
265/45R20 is a metric radial size in which 265 is the nominal section width in millimeters, 45 is the aspect ratio, R indicates radial construction, and 20 is the wheel diameter in inches. On the 2015 Mercedes-Benz Trucks ML250, this size belongs to the 20-inch wheel fitment and has a slightly wider section than the other primary sizes used on the model. It represents the largest wheel-and-tire package in this fitment group. This is the size to review when the vehicle is equipped with 20-inch wheels and you want to stay aligned with that specific setup.
Sub-model fitment is straightforward here because the covered ML250 Bluetec 4Matic uses the same three primary tire sizes found at the model level. What matters most is confirming which wheel diameter is on the vehicle, since tire choice changes with the 18-inch, 19-inch, or 20-inch setup.
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2015 Mercedes-Benz Trucks ML250 Bluetec 4Matic
The 2015 Mercedes-Benz Trucks ML250 Bluetec 4Matic uses radial tire fitments across three wheel diameters, so the main task is matching the tire to the existing 18-inch, 19-inch, or 20-inch wheel package. Tire selection then becomes a matter of staying with the correct metric size for that setup and checking condition, clearance, and any changes from stock.
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 actual tire sizes used on the 2015 Mercedes-Benz Trucks ML250, how wheel diameter affects selection, and what to inspect before putting a modern luxury SUV back into regular road use.
Tire Size & Fitment
What tire size fits a 2015 Mercedes-Benz Trucks ML250?
The 2015 Mercedes-Benz Trucks ML250 uses three primary tire sizes: 255/55R18, 255/50R19, and 265/45R20. All three are radial sizes, and each one corresponds to a different wheel diameter used on this model.
The right choice depends on the wheels actually installed on the vehicle. An ML250 with 18-inch wheels needs 255/55R18, a 19-inch setup uses 255/50R19, and a 20-inch setup uses 265/45R20. Checking the wheel itself, the existing tire sidewall, and whether the SUV still has its original wheel package helps prevent ordering the wrong size.
What size rim does a 2015 Mercedes-Benz Trucks ML250 use?
The 2015 Mercedes-Benz Trucks ML250 appears with 18-inch, 19-inch, and 20-inch rim diameters. Those rim sizes match its three primary tire fitments: 255/55R18, 255/50R19, and 265/45R20.
Rim diameter is the first thing to confirm because the tire must match it exactly. A 19-inch tire cannot be used on an 18-inch or 20-inch wheel, even when the section width seems similar. Looking at the wheel markings and the current tire size is the simplest way to verify fitment before comparing tread patterns or replacement brands.
Why does the 2015 Mercedes-Benz Trucks ML250 have more than one tire size?
The 2015 Mercedes-Benz Trucks ML250 has more than one tire size because it was fitted with different wheel diameters. The covered fitments are 255/55R18, 255/50R19, and 265/45R20, all in radial construction.
That means the tire decision is tied to the wheel package rather than a change from bias-ply to radial or from one sub-model family to another. Before choosing a replacement, confirm whether the SUV still has its original wheels or has been changed to another diameter. That one step usually resolves which of the three sizes belongs on the vehicle.
Choosing the Right Tire
What should I consider when choosing a tire for a 2015 Mercedes-Benz Trucks ML250?
Start with the correct size for the wheel diameter on the vehicle: 255/55R18, 255/50R19, or 265/45R20. Since all primary fitments for the 2015 Mercedes-Benz Trucks ML250 are radial, the main concern is matching the tire to the wheel and preserving the intended overall fitment.
After size is confirmed, compare how the SUV is used. Daily driving, highway travel, seasonal weather, and ride preferences all matter within the correct size. It also helps to inspect the existing setup for uneven wear, prior wheel changes, or suspension issues, because replacement tires will perform best when the wheel and chassis condition are sorted out first.
How do I choose between the available 255/55R18, 255/50R19, and 265/45R20 tires for a 2015 Mercedes-Benz Trucks ML250?
The choice is not between three interchangeable tire sizes, but between three wheel-specific fitments used on the 2015 Mercedes-Benz Trucks ML250. Each size belongs to a different rim diameter, so the correct tire is determined by the wheel package already on the SUV.
Once that is settled, focus on the type of driving the ML250 sees and the condition of the vehicle around the tires. A stock-height SUV with original wheels is usually straightforward, while aftermarket wheels or previous changes deserve a closer look. Matching all four tires by size and keeping overall fitment consistent is especially important on an all-wheel-drive vehicle.
What tire measurements matter most on a 2015 Mercedes-Benz Trucks ML250?
For the 2015 Mercedes-Benz Trucks ML250, the most important measurements are the tire size itself and the matching wheel diameter. The primary sizes are 255/55R18, 255/50R19, and 265/45R20, with section widths around 10 inches and overall diameters just over 29 inches.
Those measurements help explain why these fitments stay close in overall proportions even though the wheel diameters differ. In practical terms, the owner should still verify that the replacement tire matches the installed rim and that there is no rubbing from wheel changes, suspension sag, or non-stock offsets. Size printed on the sidewall remains the most important starting point.
Restoration & Appearance
Does correct tire fitment matter for a 2015 Mercedes-Benz Trucks ML250 restoration or preservation project?
Yes, correct tire fitment matters on a 2015 Mercedes-Benz Trucks ML250 even though it is a modern vehicle rather than a classic restoration candidate. Staying with the proper 255/55R18, 255/50R19, or 265/45R20 size helps preserve the intended wheel-to-tire proportions and the overall presentation of the SUV.
Preservation-minded owners should first confirm which wheel package the vehicle actually carries, especially if it has changed hands or received aftermarket wheels. Keeping the tire size aligned with that setup supports a more coherent appearance and avoids the visual mismatch that comes from overly tall, short, narrow, or wide replacements that were never meant for the installed rim diameter.
How does tire size affect the appearance of a 2015 Mercedes-Benz Trucks ML250?
Tire size has a visible effect on the stance of a 2015 Mercedes-Benz Trucks ML250 because each primary fitment pairs a different sidewall height with a different wheel diameter. The 18-inch, 19-inch, and 20-inch setups all keep the SUV in a similar overall diameter range, but they present differently on the vehicle.
A properly matched tire keeps the wheel opening, ride height impression, and sidewall proportion in balance. Appearance can look off quickly when the wrong size is used on the wrong wheel or when a previous owner has altered the setup. Confirming the existing wheel diameter before replacement is the simplest way to keep the ML250 looking settled and properly fitted.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2015 Mercedes-Benz Trucks ML250?
Yes, modifications can affect tire fitment on a 2015 Mercedes-Benz Trucks ML250. Even when the vehicle originally used 255/55R18, 255/50R19, or 265/45R20, changes such as aftermarket wheels, altered offsets, suspension lowering, or body modifications can change the space available around the tire.
That is why the current setup should be checked rather than assuming the SUV still matches stock dimensions. Look at wheel diameter, wheel width, steering clearance, and the space at the fenders and suspension. Any replacement tire should be evaluated against the vehicle as it sits now, especially if it no longer carries its original wheel and suspension configuration.
What should I inspect before driving a 2015 Mercedes-Benz Trucks ML250 on new tires?
Before driving a 2015 Mercedes-Benz Trucks ML250 on new tires, inspect the wheels for damage, confirm that the tire size matches the installed rim diameter, and make sure all four tires are appropriate for the vehicle’s setup. It also helps to check alignment condition, valve stems, and visible suspension wear.
A quick road-use inspection should include air pressure, lug hardware, and clearance at full steering lock. Watch for rubbing, vibration, or unusual pull on the first drive, since those can point to alignment or wheel-fit issues rather than the tires themselves. On a vehicle that may have seen wheel changes over time, that initial check is especially worthwhile.
How often should tires on a 2015 Mercedes-Benz Trucks ML250 be inspected?
Tires on a 2015 Mercedes-Benz Trucks ML250 should be inspected regularly, not just when tread looks low. A visual check for air loss, uneven wear, cuts, bulges, and sidewall damage is smart before longer trips and at routine service intervals, especially on an SUV that may carry family or highway mileage.
Vehicles that sit for stretches still need attention because age, storage conditions, and underinflation can affect the tires even when mileage is low. Looking over the tires every month or before extended driving helps catch problems early. It is also useful to inspect after pothole impacts or curb contact, since wheel and tire damage can occur without an immediate flat.
