The 2009 Mercedes-Benz Trucks ML320 sits in the modern luxury SUV era, blending diesel efficiency, all-weather capability, and the substantial road presence buyers expected from a premium utility vehicle of its time. For owners today, tire selection is less about sorting through multiple factory sizes and more about matching the vehicle’s intended use with the correct fitment details. This ML320 uses a 255/50R19 radial tire on a 19-inch rim, giving it a distinctly modern metric fitment. The main decision is choosing the right radial tire within that size while keeping wheel compatibility, ride expectations, and everyday road use in clear focus.
Which Tire Size Is Right for The 2009 Mercedes-Benz Trucks ML320
The 2009 Mercedes-Benz Trucks ML320 uses one primary tire size: 255/50R19. It is a radial tire fitment on a 19-inch rim, and the covered Bluetec 4Matic sub-model uses that same size, so the decision is not about multiple factory fitments but about selecting the right tire within the correct size and confirming the wheel setup on the vehicle.
A 255/50R19 tire uses modern metric sizing: 255 is the nominal section width in millimeters, 50 is the aspect ratio, R identifies radial construction, and 19 is the rim diameter in inches. That makes it a contemporary SUV fitment rather than a vintage numeric or alphanumeric size. On the 2009 Mercedes-Benz Trucks ML320, this size supports a straightforward replacement search centered on proper radial fitment and 19-inch wheel compatibility. The practical next step is confirming that the vehicle still has the correct wheel diameter and an unmodified setup before comparing tire choices.
Fitment is straightforward for the covered 2009 Mercedes-Benz Trucks ML320 sub-model. The key point is confirming that the vehicle is the Bluetec 4Matic and still carries the correct 19-inch wheel setup before choosing a replacement tire.
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2009 Mercedes-Benz Trucks ML320 Bluetec 4Matic
The 2009 Mercedes-Benz Trucks ML320 Bluetec 4Matic uses the 255/50R19 radial tire size. That keeps tire selection focused on choosing the right radial in the correct modern metric fitment and verifying wheel condition, wheel diameter, and any prior modifications before installation.
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 size, 19-inch rim fitment, sub-model consistency, selection considerations, and the checks that matter before putting a 2009 Mercedes-Benz Trucks ML320 back into regular road use.
Tire Size & Fitment
What tire size fits a 2009 Mercedes-Benz Trucks ML320?
The 2009 Mercedes-Benz Trucks ML320 uses a 255/50R19 tire size. That is a radial, modern metric fitment paired with a 19-inch rim, and it is the primary size used for this model.
That makes fitment relatively straightforward as long as the vehicle still has its proper wheel setup. A replacement search should begin by confirming the wheel diameter is still 19 inches and that no previous owner changed the wheels or altered the suspension in a way that affects clearance or tire size selection.
What size rim does a 2009 Mercedes-Benz Trucks ML320 use?
The 2009 Mercedes-Benz Trucks ML320 uses a 19-inch rim with its 255/50R19 tire size. The tire’s final number, 19, identifies the wheel diameter the tire is built to mount on.
Wheel diameter is the first thing to verify before choosing replacement tires. Even when the vehicle originally used a 19-inch rim, aftermarket wheels are common on SUVs, and tire selection can quickly go off track if the current wheel diameter differs from the original fitment or if wheel width and offset have been changed.
Does the 2009 Mercedes-Benz Trucks ML320 Bluetec 4Matic use the same tire size?
Yes. The covered 2009 Mercedes-Benz Trucks ML320 Bluetec 4Matic uses the same 255/50R19 radial tire size. That means sub-model identification does not introduce a different primary size within the fitment covered here.
Even with a shared size, it is still worth checking the vehicle itself before ordering tires. Wheel swaps, replacement rims, and suspension changes can affect what is currently on the ML320, so confirming the actual wheel diameter and inspecting for clearance issues helps prevent choosing a tire based only on model name.
Choosing the Right Tire
What should I consider when choosing a 255/50R19 tire for a 2009 Mercedes-Benz Trucks ML320?
Start with the correct size and construction: 255/50R19 radial on a 19-inch wheel. Once that is confirmed, the decision shifts to the type of road use the ML320 sees, the ride character you want, and whether the vehicle remains in standard wheel and suspension configuration.
A careful selection also means inspecting the actual wheels before purchase. Diameter is only part of the fitment picture, so wheel width, overall tire clearance, and any previous modifications deserve attention, especially on a used luxury SUV where aftermarket wheel packages are common.
How do I choose between the available 255/50R19 tires for a 2009 Mercedes-Benz Trucks ML320?
Choosing among 255/50R19 tires begins with staying inside the correct size and radial construction for the 2009 Mercedes-Benz Trucks ML320. After that, compare the tires based on the vehicle’s use, whether it is driven regularly or occasionally, and how closely the current wheel setup matches stock dimensions.
It also helps to think beyond size alone. Tread design, road manners, and wheel compatibility all matter in real use, especially on a heavier SUV. A tire that matches the proper size code but does not suit the ML320’s wheels or intended driving pattern can still create an unsatisfying result.
What rim-fitment details should I compare when choosing 2009 Mercedes-Benz Trucks ML320 tires?
The most important rim-fitment detail is the 19-inch wheel diameter required by the 255/50R19 tire size. That confirms the tire can mount to the wheel in basic terms, but it is only the first step in a proper fitment check.
Wheel width, offset, and overall clearance should also be reviewed before finalizing a tire choice. Those details become especially important if the ML320 has replacement wheels, a lowered stance, or other changes that reduce room at the fender, suspension, or steering components.
Restoration & Appearance
Does correct tire fitment matter for a 2009 Mercedes-Benz Trucks ML320 restoration?
Yes. Even on a newer collector-interest SUV, correct tire fitment matters because it affects stance, wheel compatibility, and the way the vehicle presents visually. For the 2009 Mercedes-Benz Trucks ML320, staying with the proper 255/50R19 size preserves the intended relationship between tire and 19-inch wheel.
Appearance is only part of the equation, though. A restoration-minded owner should also make sure the wheel setup has not been altered over time, since non-original wheels can change the visual balance and complicate replacement choices. Correct size selection helps the ML320 look right and drive with fewer fitment surprises.
Which tire should I choose for a period-appropriate 2009 Mercedes-Benz Trucks ML320?
A period-appropriate starting point for a 2009 Mercedes-Benz Trucks ML320 is the original-size format itself: 255/50R19 radial. Because this is a modern SUV application, maintaining the correct metric radial size does more for the vehicle’s overall presentation than trying to reinterpret it with an off-size alternative.
The best approach is to keep the fitment visually balanced and mechanically sensible. That means verifying the SUV still wears the correct wheel diameter and avoiding tire choices that distort the stance or sidewall profile. For owners concerned with authenticity, model-specific photos and marque references can help guide final appearance decisions.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2009 Mercedes-Benz Trucks ML320?
Yes. Modifications can change tire fitment on a 2009 Mercedes-Benz Trucks ML320 even when the original size is 255/50R19. Aftermarket wheels, suspension changes, lowering, or body alterations can all influence whether the intended tire clears properly at full steering angle and through suspension travel.
That is why the vehicle itself deserves a quick inspection before ordering replacement tires. Measuring the current wheel diameter, checking for non-stock wheel width or offset, and looking for signs of rubbing around the fenders or inner wheelhouse can prevent fitment issues that do not show up from size code alone.
What should I inspect before driving a 2009 Mercedes-Benz Trucks ML320 on new tires?
Before road use, inspect the wheels for damage, confirm all four tires match the intended size, and check inflation pressure, lug hardware, and overall clearance. It is also smart to look over the suspension and steering for worn components that could affect how the new tires track and wear.
A short, careful test drive helps verify that everything is behaving normally. Listen for rubbing, watch for vibration, and pay attention to steering response and straight-line stability. Catching those issues early is especially useful on a heavier SUV like the ML320, where small setup problems can become noticeable quickly.
How often should tires on a 2009 Mercedes-Benz Trucks ML320 be inspected?
Tires on a 2009 Mercedes-Benz Trucks ML320 should be inspected regularly, not just when tread looks low. Routine checks for pressure loss, uneven wear, cuts, bulges, embedded debris, and sidewall damage help spot problems before they affect ride quality or road safety.
Low-use vehicles deserve the same attention as daily drivers. An ML320 that sits for long periods can still develop flat spotting, age-related cracking, or air loss, so a visual inspection before longer trips is worthwhile. Keeping the tires clean, properly inflated, and protected from prolonged storage stress helps extend usable life.
