In 2009, Mercedes-Benz Trucks covered a broad luxury SUV and crossover range, from the hand-built AMG performance variants to family-oriented GL, ML, and R-Class models. That variety matters because 2009 Mercedes-Benz Trucks vehicles did not share one universal tire size across the lineup; eight different radial sizes were used across eleven models, with wheel diameters ranging from 18 to 21 inches. The real choice usually starts with identifying the exact model first, since a GL450 could use multiple factory sizes while an ML63 AMG or GL550 points to larger, more specialized fitments. Before choosing a tire, confirm your model and the wheel diameter currently on the vehicle.
Which Tire Size Is Right for Your 2009 Mercedes-Benz Trucks
Eight tire sizes appear across the 2009 Mercedes-Benz Trucks range, and they vary by model rather than being shared across the full lineup. Because these sizes span 18-, 19-, 20-, and 21-inch wheels, the first step is confirming the correct rim diameter for your specific model and wheel package. Understanding that distinction before choosing a product saves time and helps you match the tire to the right vehicle.
Year(s): 2009|Fit(s): G55 AMG, GL450|Construction: Radial|Rim: 19-in rim
275/55R19 is a radial metric size with a 275-millimeter section width, a 55-series aspect ratio, and a 19-inch rim diameter. This size fits the G55 AMG and certain GL450 applications, and product details here do not establish a broader brand or sidewall range for it. It is a model-specific fitment within the 2009 Mercedes-Benz Trucks range, so it should be chosen only when your vehicle and wheels call for a 19-inch setup.
Year(s): 2009|Fit(s): G550, GL450|Construction: Radial|Rim: 18-in rim
265/60R18 is a radial metric size with a 265-millimeter section width, a 60-series aspect ratio, and an 18-inch rim diameter. This size is used on the G550 and certain GL450 models, and the available details here do not define a product range by brand or sidewall style for it. It is specific to those models rather than universal across 2009 Mercedes-Benz Trucks vehicles, making wheel diameter confirmation especially important before moving forward.
Year(s): 2009|Fit(s): GL320, GL450|Construction: Radial|Rim: 20-in rim
275/50R20 is a radial metric size with a 275-millimeter section width, a 50-series aspect ratio, and a 20-inch rim diameter. This size serves the GL320 and certain GL450 applications, and no broader product mix is established here by brand, sidewall style, or tube status. It is a model-specific 20-inch fitment that suits owners who are matching the wheel package used on those GL models.
Year(s): 2009|Fit(s): GL550|Construction: Radial|Rim: 21-in rim
295/40R21 is a radial metric size with a 295-millimeter section width, a 40-series aspect ratio, and a 21-inch rim diameter. This size is exclusive to the GL550 within the 2009 Mercedes-Benz Trucks lineup, and the details here do not establish a broader brand or sidewall selection for it. Buyers with a GL550 should treat it as a dedicated large-diameter fitment tied to that model's specific wheel package.
Year(s): 2009|Fit(s): ML320, ML350, ML550, R320, R350|Construction: Radial|Rim: 19-in rim
255/50R19 is a radial metric size with a 255-millimeter section width, a 50-series aspect ratio, and a 19-inch rim diameter. It is shared by the ML320, ML350, ML550, R320, and some R350 applications, though no broader product range is established here by brand, sidewall style, or speed rating. Because this size crosses multiple models, it is one of the more common 2009 Mercedes-Benz Trucks fitments for owners starting with a 19-inch wheel.
Year(s): 2009|Fit(s): ML63 AMG|Construction: Radial|Rim: 21-in rim
295/35R21 is a radial metric size with a 295-millimeter section width, a 35-series aspect ratio, and a 21-inch rim diameter. This size is specific to the ML63 AMG and the available details here do not establish a broader mix of brands, sidewall styles, or tube status for it. It is a specialized AMG fitment intended for the larger-diameter wheel package used on that high-performance model.
Year(s): 2009|Fit(s): ML63 AMG|Construction: Radial|Rim: 20 in
295/40R20 is a radial metric size with a 295-millimeter section width, a 40-series aspect ratio, and a 20-inch rim diameter. Nitto offers this size in a Blackwall radial, and the available product here is a tubeless-style ZR fitment carrying a W speed rating with a 168 mph ceiling. Because this size is specific to the ML63 AMG, it suits owners matching that model's 20-inch wheel package and looking for a modern performance-oriented radial.
Year(s): 2009|Fit(s): R350|Construction: Radial|Rim: 18-in rim
255/55R18 is a radial metric size with a 255-millimeter section width, a 55-series aspect ratio, and an 18-inch rim diameter. This size is exclusive to certain R350 applications, and the details here do not establish a broader brand, sidewall, or speed-rating range for it. It is not a full-line Mercedes-Benz Trucks size for 2009, so buyers should confirm they are working from the correct R-Class wheel package.
Eleven Mercedes-Benz Trucks models are covered for 2009, spanning AMG performance SUVs, full-size GL models, midsize ML models, and the wagon-like R-Class. Tire size varies by model, and in a few cases by wheel package within the same model, so identifying the exact model is more important here than relying on year and make alone. Select your model below to narrow the fitment history and tire choices.
2009 Mercedes-Benz Trucks G55 AMG
The G55 AMG carried the traditional G-Class shape into the modern performance era, combining a boxy off-road silhouette with AMG power and luxury appointments. Its tires mount on 19-inch wheels in this application, which sets it apart from the 18-inch G550 and places it closer to the more performance-oriented side of the range.
The G550 was the non-AMG G-Class choice for buyers who wanted the same unmistakable military-derived body and upscale cabin without the AMG-specific performance focus. Its tires mount on 18-inch wheels here, giving it a distinct fitment from the G55 AMG.
The GL320 served as a full-size Mercedes SUV aimed at comfort, space, and long-distance family use, with the taller body and three-row layout that defined the GL line. Its fitment uses 20-inch wheels in this application, separating it from smaller-wheel GL variants.
Associated Tire Sizes:
275/50R20 — radial, factory-style large SUV fitment
The GL450 sat in the heart of the GL lineup and could appear with more than one wheel-and-tire package, reflecting how luxury SUVs of this era often varied by equipment level. Depending on the vehicle, its tires mount on 18-, 19-, or 20-inch wheels, so wheel diameter must be confirmed before selecting a replacement.
The GL550 was the high-output, premium end of the standard GL range, emphasizing luxury and strong road presence without stepping into full AMG territory. Its tires mount on 21-inch wheels here, making it one of the largest-diameter fitments in the 2009 Mercedes-Benz Trucks lineup.
Associated Tire Sizes:
295/40R21 — radial, large-diameter luxury SUV fitment
The ML320 belonged to Mercedes-Benz's midsize luxury SUV family, a range known for balancing everyday utility with a more road-focused character than the larger GL. Its application uses 19-inch wheels, shared with several other ML and R-Class models.
The ML350 was a core volume model in the ML lineup, popular for buyers who wanted Mercedes luxury in a versatile midsize SUV footprint. Its tires mount on 19-inch wheels in this fitment, matching other ML and R-Class applications from the same year.
The ML550 brought V8 power to the midsize ML chassis and sat above the everyday ML models while remaining distinct from AMG's more specialized tuning. It uses a 19-inch wheel fitment here, sharing its tire size with several other Mercedes-Benz Trucks models from 2009.
The ML63 AMG transformed the ML into a high-performance luxury SUV with AMG-specific chassis, styling, and drivetrain character. Its fitments mount on either 20- or 21-inch wheels depending on the setup, so this is one of the most size-sensitive models in the 2009 Mercedes-Benz Trucks range.
The R320 occupied Mercedes-Benz's unusual crossover space between wagon, minivan, and SUV, with a long-roof design aimed at passenger comfort and highway travel. Its tires mount on 19-inch wheels in this application, sharing size with several ML and R-Class variants.
The R350 was the broader-market version of the R-Class formula, offering Mercedes luxury and flexible interior space in a shape that never fit neatly into one category. Depending on the vehicle, its tires mount on either 18- or 19-inch wheels, so matching the current wheel package is essential.
One product is available across eight tire sizes for 2009 Mercedes-Benz Trucks vehicles. The 295/40R20 size has one Nitto radial in Blackwall styling. Confirm your exact size and wheel diameter before selecting, especially where one model was offered with more than one fitment.
These answers focus on how 2009 Mercedes-Benz Trucks fitments differ by model, how metric size codes relate to the GL, ML, G-Class, and R-Class ranges, and what to check when replacing tires on a low-use modern luxury SUV or crossover.
Size Basics & Fitment
What tire sizes fit 2009 Mercedes-Benz Trucks vehicles?
2009 Mercedes-Benz Trucks vehicles use eight radial sizes across the full model range: 275/55R19 for the G55 AMG and some GL450 models; 265/60R18 for the G550 and some GL450 models; 275/50R20 for the GL320 and some GL450 models; 295/40R21 for the GL550; 255/50R19 for the ML320, ML350, ML550, R320, and some R350 models; 295/35R21 and 295/40R20 for the ML63 AMG; and 255/55R18 for some R350 models. Rim diameters span 18, 19, 20, and 21 inches, so there is no single year-wide wheel size.
That means year and make alone are not enough to choose a tire for 2009 Mercedes-Benz Trucks applications. Start by confirming the exact model, then verify the wheel diameter already on the vehicle before comparing brands or tread styles. Models such as the GL450, ML63 AMG, and R350 are especially important to check carefully because they appear with more than one factory tire size.
What does 275/55R19 mean on a 2009 Mercedes-Benz Trucks tire?
On a 2009 Mercedes-Benz Trucks tire, 275/55R19 is a modern metric radial size. The 275 is the nominal section width in millimeters, 55 is the aspect ratio, meaning the sidewall height is 55 percent of the section width, R identifies radial construction, and 19 is the rim diameter in inches. Within this lineup, that size belongs to the G55 AMG and certain GL450 models.
Reading the size correctly helps prevent one of the most common replacement mistakes: matching width while missing wheel diameter. A 275/55R19 cannot interchange with an 18-, 20-, or 21-inch fitment, even if the vehicle is from the same year and make. If your GL450 currently wears 19-inch wheels, this code is the place to begin; if it wears 18s or 20s, you need the corresponding size for that wheel package instead.
Do all 2009 Mercedes-Benz Trucks models use the same tire size?
No, 2009 Mercedes-Benz Trucks models do not use the same tire size. The lineup covers everything from G-Class SUVs to GL, ML, and R-Class vehicles, and the tire fitments vary substantially by model. Some sizes are shared across multiple vehicles, such as 255/50R19 on several ML and R-Class models, while others are exclusive to one model, such as 295/40R21 on the GL550 or 295/35R21 on the ML63 AMG.
That variation matters because it changes both the wheel diameter and the overall tire proportions. A shared make badge does not mean a shared tire, especially on Mercedes-Benz utility vehicles from this era where wheel packages could differ within the same model line. Confirm the model first, then read the sidewall on the current tire or inspect the wheel diameter before choosing a replacement path.
Buying the Right Tire
What sidewall styles are available for 2009 Mercedes-Benz Trucks tires?
The available sidewall style confirmed here for 2009 Mercedes-Benz Trucks fitments is Blackwall in the 295/40R20 size used on the ML63 AMG. That appearance suits the late-2000s Mercedes performance and luxury SUV market, where clean black sidewalls were typical and wide whitewalls or vintage-style sidewall treatments were not part of the original visual character.
For most owners, sidewall style on a 2009 Mercedes-Benz Trucks vehicle is more about preserving the correct modern look than chasing a period antique detail. If appearance matters, compare the sidewall markings and overall presentation of the tire you are considering against the character of your particular model. AMG applications in particular usually look most natural with contemporary blackwall performance tires.
What brands make tires for 2009 Mercedes-Benz Trucks vehicles?
Nitto is confirmed in the 295/40R20 fitment for the 2009 Mercedes-Benz Trucks ML63 AMG, where the NT555 G2 appears as a radial Blackwall performance tire. That places at least one recognized modern performance brand into the year-make range, specifically for the AMG-oriented 20-inch application.
Brand choice should follow fitment confirmation, not the other way around. Mercedes-Benz Trucks models from 2009 use several different wheel diameters and widths, so the right brand for an ML63 AMG on 20-inch wheels may have nothing to do with the right choice for a GL450 on 18s or 19s. Once the exact size is confirmed, then it makes sense to compare brand character, sidewall appearance, and intended use.
What is the difference between the Nitto NT555 G2 and other 2009 Mercedes-Benz Trucks tire options?
Within the 2009 Mercedes-Benz Trucks range, the Nitto NT555 G2 is specifically confirmed in 295/40R20 for the ML63 AMG. It is a radial Blackwall tire with a 20-inch rim diameter, a 110W service description, and a W speed rating, which carries a 168 mph ceiling. Its sizing and speed category place it squarely in the modern performance end of the lineup rather than the everyday luxury SUV sizes used on many GL, ML, and R-Class models.
That makes the NT555 G2 relevant mainly to owners matching the ML63 AMG's 20-inch fitment and performance character. It is not a stand-in for the other Mercedes-Benz Trucks sizes used in 2009, because those applications differ in section width, aspect ratio, and wheel diameter. Treat it as a model- and wheel-specific choice rather than a universal Mercedes SUV tire.
Fitting & Setup
What rim width do 2009 Mercedes-Benz Trucks tires require?
Rim diameter is clearly established across the 2009 Mercedes-Benz Trucks lineup: 18-inch wheels for 265/60R18 and 255/55R18, 19-inch wheels for 275/55R19 and 255/50R19, 20-inch wheels for 275/50R20 and 295/40R20, and 21-inch wheels for 295/40R21 and 295/35R21. A specific rim width range is not established here beyond the confirmed 20-inch diameter of the available 295/40R20 product.
In practice, rim diameter is the first fitment gate and should be verified before anything else. Once diameter is confirmed, check the actual wheel width stamped on the wheel or verify it through a reliable Mercedes-Benz parts reference. That step is especially important on GL450, ML63 AMG, and R350 models, where more than one wheel-and-tire package can appear within the same model year.
Do 2009 Mercedes-Benz Trucks tires require inner tubes?
The confirmed 295/40R20 fitment for the 2009 Mercedes-Benz Trucks ML63 AMG appears as a modern tubeless-style radial, identified by its performance size marking and contemporary construction. No tube-type marking is established for that application, and nothing in this year-make range suggests an antique or bias-ply tube-required fitment.
For most 2009 Mercedes-Benz Trucks owners, the practical check is the specific sidewall marking on the tire you are considering and the condition of the wheel itself. Tubeless operation is standard territory for late-model Mercedes SUVs and crossovers, but it is still smart to inspect valve stems, bead-seat condition, and wheel damage any time tires are replaced. That matters just as much as the tire itself for air retention and ride quality.
Can the original 2009 Mercedes-Benz Trucks wheels be used with all tire sizes?
No, the original 2009 Mercedes-Benz Trucks wheels cannot be assumed to work with all tire sizes across the lineup. These vehicles use multiple rim diameters, from 18 inches up to 21 inches, and the tires are matched to those wheel sizes. A 19-inch tire such as 255/50R19 or 275/55R19 cannot mount on an 18-, 20-, or 21-inch wheel.
Original wheels can be reused only when the tire size matches the wheel diameter and the wheel package belongs to the correct model application. This is particularly important on models that came with multiple factory choices, such as the GL450, R350, and ML63 AMG. Before reusing wheels, confirm both the actual wheel diameter and that the replacement size matches the setup currently on the vehicle.
Maintenance, Storage & Longevity
How should I store a 2009 Mercedes-Benz Trucks when the tires are fitted?
A 2009 Mercedes-Benz Trucks vehicle should be stored in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, furnaces, and other ozone-producing equipment. Keep the tires clean, maintain proper inflation, and move the vehicle periodically if it will sit for long stretches. These are all radial fitments, so they generally handle storage better than older bias-ply tires, but long static periods can still create flat-spotting and age-related sidewall stress.
If the vehicle will sit for months at a time, many collectors either roll it occasionally or support it in a way that reduces constant load on one section of the tread. The goal is to protect both the tire carcass and the wheel-and-valve area from moisture, UV exposure, and prolonged compression. Good storage habits matter just as much on a low-mileage modern Mercedes SUV as they do on an older collector car.
How long do tires on a 2009 Mercedes-Benz Trucks typically last?
On a 2009 Mercedes-Benz Trucks vehicle, tire age usually matters more than mileage because many luxury SUVs and specialty models accumulate relatively low annual use. A sensible rule is to begin evaluating tires closely once they reach five to seven years of age and to treat about ten years as a serious replacement point regardless of remaining tread. The DOT date code on the sidewall is the key reference for determining actual tire age.
That approach is especially important if the vehicle looks cosmetically excellent but spends long periods parked. Rubber hardens over time, internal materials age, and older tires may no longer behave as expected even when tread depth appears acceptable. If you have recently acquired a 2009 Mercedes-Benz Trucks model, checking the tire date codes is one of the first useful maintenance steps.
How often should tires on a 2009 Mercedes-Benz Trucks be inspected?
Tires on a 2009 Mercedes-Benz Trucks vehicle should be inspected before every drive and again before any longer highway outing. Look for sidewall cracking, punctures, bulges, uneven wear, exposed cords, and signs of pressure loss. On a modern SUV or crossover, also pay attention to tread shoulder wear and any vibration that may suggest alignment, balancing, or suspension issues.
A quick walkaround catches problems early and helps you avoid discovering them at speed. For a vehicle that sits often, monthly pressure checks are also worthwhile because slow air loss can go unnoticed until the tire has already been stressed. If one tire repeatedly loses pressure, inspect the valve stem and wheel sealing surfaces rather than assuming the tread area is the only possible source.
Restoration & Authenticity
What tires were originally fitted to the 2009 Mercedes-Benz Trucks G55 AMG?
A 2009 Mercedes-Benz Trucks G55 AMG uses a modern radial metric tire rather than an antique or bias-ply format. In this year-make range, the G55 AMG is associated with 275/55R19, which fits the late-2000s Mercedes practice of pairing luxury-performance SUVs with large-diameter radial tires. The exact original brand can vary by market, option package, and production source, so brand-level originality should be confirmed through factory references or marque specialists if absolute accuracy matters.
For most owners, authenticity on a 2009 Mercedes-Benz Trucks model comes down to preserving the correct size category, wheel diameter, and overall visual character rather than chasing a vintage-style sidewall treatment. If you are preparing a highly original G55 AMG, check factory literature, delivery photos, or a model-specific club resource to verify whether your vehicle's current 19-inch setup matches its as-delivered configuration.
Does correct tire fitment matter for showing a 2009 Mercedes-Benz Trucks?
Yes, correct tire fitment matters when showing a 2009 Mercedes-Benz Trucks vehicle, even though these are modern rather than prewar or muscle-era applications. Judges and knowledgeable enthusiasts often notice whether the tire size, wheel diameter, sidewall appearance, and overall stance suit the model. A GL550 on its 21-inch fitment, for example, presents differently from an R350 on 18s or 19s, and an obviously mismatched size can disrupt the vehicle's intended look.
For casual local events, being close to the proper fitment is often enough, but marque-focused judging tends to be stricter about wheel-and-tire presentation. If authenticity matters, match the size to the exact model and wheel package first, then evaluate sidewall appearance and brand character. Event-specific standards can vary, so Mercedes-Benz clubs and model registries are still the best final check before a judged show.
What is the difference between AMG and non-AMG 2009 Mercedes-Benz Trucks tire fitment choices?
AMG and non-AMG 2009 Mercedes-Benz Trucks models often separate themselves through wheel diameter and tire proportions as much as through styling and performance. The ML63 AMG uses 295/35R21 or 295/40R20, while the G55 AMG uses 275/55R19; non-AMG counterparts in the GL, ML, and R-Class families frequently use narrower or smaller-diameter sizes such as 255/55R18, 255/50R19, or 265/60R18. That difference reflects the sportier road-focused character of the AMG variants.
From an authenticity standpoint, preserving those distinctions matters because tire size contributes heavily to the vehicle's stance and period-correct appearance. An AMG wearing an undersized non-AMG fitment, or a standard model wearing an overly aggressive AMG-style size, can look out of character even if the tire physically fits the wheel. Keeping the tire size aligned with the exact model is the cleanest route to factory-appropriate presentation.
Safety & Road Use
Are 2009 Mercedes-Benz Trucks tires safe for highway driving?
Yes, 2009 Mercedes-Benz Trucks tires are fundamentally highway-suited because the fitments in this range are all modern radial sizes intended for contemporary SUV and crossover use. The confirmed 295/40R20 Nitto NT555 G2 for the ML63 AMG carries a W speed rating, which means a 168 mph ceiling. In normal real-world use, the vehicle's condition, alignment, braking system, suspension health, and the tire's age are usually more important safety factors than the theoretical top-speed capability stamped on the sidewall.
Highway safety depends on matching the correct size to the correct wheel, maintaining proper inflation, and avoiding aged or damaged tires. A well-maintained GL, ML, G-Class, or R-Class on the right tire size is far better positioned for stable road use than a vehicle running an incorrect wheel package or decade-old rubber with good-looking tread. Before sustained interstate driving, confirm both fitment and tire age.
What inflation pressure should I use for 2009 Mercedes-Benz Trucks tires?
Inflation pressure on a 2009 Mercedes-Benz Trucks vehicle should follow the factory placard or owner's manual for the exact model and wheel package, not a generic number borrowed from another size in the lineup. The confirmed 295/40R20 Nitto NT555 G2 carries its own service description and manufacturer pressure standards, but that does not automatically translate to the other 18-, 19-, 20-, or 21-inch Mercedes-Benz Trucks sizes used in 2009.
That distinction matters because load distribution, vehicle weight, and intended ride behavior differ between a G-Class, GL, ML, and R-Class. Use the vehicle's original pressure recommendation as your baseline for normal operation, then make sure the tire itself is appropriate for that application. If the vehicle has been modified with non-original wheels, confirm the full package carefully before setting pressures.
What should I check before taking a 2009 Mercedes-Benz Trucks on a longer drive?
Before a longer drive in a 2009 Mercedes-Benz Trucks vehicle, inspect each tire for cracking, cuts, bulges, punctures, uneven wear, and correct cold inflation pressure. Check the tread depth across the full width of the tire, inspect valve stems for age or damage, and make sure the spare is present and serviceable if the vehicle carries one. On models with multiple possible factory sizes, verify that all four road tires are the correct size for the wheel package on the vehicle.
Tires are only one part of the pre-drive checklist on a modern aging luxury SUV, but they are among the easiest items to inspect before trouble starts. Follow the tire check with a quick review of brakes, fluids, battery condition, lights, and suspension feel. If the vehicle has been sitting for an extended period, take a short local test drive first so any vibration, pull, or pressure issue shows up close to home.
