The 2013 Mercedes-Benz Trucks GL450 belongs to the full-size luxury SUV era where quiet highway manners, substantial curb presence, and all-weather confidence were central to the vehicle’s character. It was built to carry modern touring expectations, so tire choice affects not just appearance, but ride quality, steering response, and proper wheel fitment. This GL450 uses one of two radial sizes depending on configuration: 275/55R19 or 275/50R20. That makes the first decision less about brand preference and more about confirming whether the vehicle is the Base model or the w/Appearance Pkg. setup. Once that is settled, the focus shifts to correct rim diameter, overall fitment, and road-ready tire condition.
Which Tire Size Is Right for The 2013 Mercedes-Benz Trucks GL450
The 2013 Mercedes-Benz Trucks GL450 uses two primary tire sizes, and the correct one depends on the specific sub-model and wheel diameter. Both fitments are radial, but one uses a 19-inch rim and the other uses a 20-inch rim, so confirming the exact wheel setup is the first step before choosing a replacement tire.
The 275/55R19 size is a metric radial format in which 275 is the nominal section width in millimeters, 55 is the aspect ratio, R identifies radial construction, and 19 is the rim diameter in inches. On the 2013 Mercedes-Benz Trucks GL450, this size is part of the standard radial fitment and is tied to the 19-inch wheel setup. Its dimensions make it useful for owners who need to match the Base model configuration rather than switching wheel diameters. The practical choice here is verifying the wheel size already on the vehicle and replacing it with the same size format.
The 275/50R20 size follows the same metric radial system, with a 275-millimeter nominal section width, a 50-series profile, radial construction, and a 20-inch rim diameter. For the 2013 Mercedes-Benz Trucks GL450, this fitment belongs to the w/Appearance Pkg. configuration and should be treated as a distinct wheel-and-tire setup rather than a casual substitute for the 19-inch arrangement. It is the right size to evaluate when the vehicle already carries the larger 20-inch wheels. Checking the actual wheel diameter before purchase matters more here than comparing the two sizes by appearance alone.
Sub-model fitment matters on the 2013 Mercedes-Benz Trucks GL450 because the covered configurations do not share the same tire size. The key step is identifying whether the vehicle is the Base model or the w/Appearance Pkg. version, then matching the tire to the correct wheel diameter.
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2013 Mercedes-Benz Trucks GL450 Base
The 2013 Mercedes-Benz Trucks GL450 Base uses the 275/55R19 radial fitment on a 19-inch wheel setup. For tire selection, that means staying focused on the standard-size replacement path rather than comparing it loosely to the Appearance Package wheel and tire combination.
The 2013 Mercedes-Benz Trucks GL450 w/Appearance Pkg. uses the 275/50R20 radial fitment on a 20-inch wheel setup. That makes wheel confirmation especially important, since this configuration requires the larger rim diameter and should be matched accordingly when replacing tires.
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
Common questions for the 2013 Mercedes-Benz Trucks GL450 usually center on the correct tire size by sub-model, 19-inch versus 20-inch rim fitment, and what to inspect before putting a luxury SUV like this back into regular road use.
Tire Size & Fitment
What tire size fits a 2013 Mercedes-Benz Trucks GL450?
A 2013 Mercedes-Benz Trucks GL450 uses either 275/55R19 or 275/50R20, depending on the exact sub-model. The Base model uses 275/55R19, while the GL450 w/Appearance Pkg. uses 275/50R20. Both are radial tire fitments, but they are matched to different wheel diameters.
The important next step is confirming which wheel setup is actually on the vehicle, especially if it has changed hands or has had wheel upgrades over time. Matching the tire to the correct sub-model and rim diameter is more important than comparing the two sizes by overall look, since a 19-inch tire and a 20-inch tire are not selected interchangeably.
What size rim does a 2013 Mercedes-Benz Trucks GL450 use?
The 2013 Mercedes-Benz Trucks GL450 uses either a 19-inch or 20-inch rim, depending on configuration. The Base model is associated with the 275/55R19 fitment, and the GL450 w/Appearance Pkg. is associated with the 275/50R20 fitment. Both tire sizes are radial constructions built around those specific rim diameters.
Wheel diameter should be checked directly on the vehicle before replacing tires, since trim-specific fitment changes the correct selection. If the SUV has aftermarket wheels, that inspection becomes even more important. The tire size on the sidewall and the actual wheel diameter need to agree, or the replacement process can go in the wrong direction before brand or tread choices are even considered.
Why does the 2013 Mercedes-Benz Trucks GL450 have more than one tire size?
The 2013 Mercedes-Benz Trucks GL450 has more than one tire size because different sub-model configurations use different wheel packages. The Base model uses 275/55R19, while the w/Appearance Pkg. version uses 275/50R20. Each size is tied to a different rim diameter rather than being a random alternate within the same setup.
That distinction matters because the first buying decision is not simply choosing between two close-looking sizes. It is identifying the exact GL450 configuration and confirming the wheel diameter already on the vehicle. Once that is verified, tire selection becomes much more straightforward, and the focus can move to condition, intended use, and maintaining consistent fitment across all four corners.
Choosing the Right Tire
What should I consider when choosing a tire for a 2013 Mercedes-Benz Trucks GL450?
Start with the exact fitment the vehicle uses: 275/55R19 for the Base model or 275/50R20 for the GL450 w/Appearance Pkg. Since both are radial sizes, the main issue is not construction type but matching the tire to the correct wheel diameter and sub-model configuration before anything else.
After size is confirmed, compare tires based on how the SUV is used and whether the wheel setup is still original to the vehicle. A GL450 that sees regular highway miles may call for a different selection emphasis than one driven occasionally. It also helps to inspect current tires for uneven wear, since that can reveal alignment or suspension issues worth correcting before installing replacements.
How do I choose between the available tires for a 2013 Mercedes-Benz Trucks GL450?
Choosing between tires for a 2013 Mercedes-Benz Trucks GL450 begins with the correct size, not the broadest selection. The two fitments serve different wheel diameters, so a Base model owner should focus on 275/55R19 options, while an owner of the w/Appearance Pkg. setup should stay within 275/50R20 choices.
Once the size is settled, compare factors such as road use, ride priorities, and whether the vehicle still has its original-style wheel package. It is also smart to consider how evenly the current tires have worn and whether the replacement should be installed as a matched set. Those practical checks often matter more than trying to compare tires across two sizes that do not serve the same setup.
How important is wheel setup when selecting 2013 Mercedes-Benz Trucks GL450 tires?
Wheel setup is central to tire selection on a 2013 Mercedes-Benz Trucks GL450 because the two approved tire sizes use different rim diameters. A 275/55R19 belongs with a 19-inch wheel, and a 275/50R20 belongs with a 20-inch wheel. That makes wheel confirmation the key first step in any replacement decision.
This matters especially on used luxury SUVs, where appearance packages, dealer-installed wheel changes, or aftermarket replacements may have altered the original configuration. Reading the current tire sidewall helps, but it is better to verify the actual wheel size directly as well. Taking that extra step reduces the chance of ordering the wrong size and keeps the fitment process grounded in the vehicle’s real setup.
Restoration & Appearance
Does correct tire fitment matter for a 2013 Mercedes-Benz Trucks GL450 restoration or preservation project?
Yes, correct tire fitment matters on a 2013 Mercedes-Benz Trucks GL450 even when the goal is preservation rather than full restoration. This vehicle uses either 275/55R19 or 275/50R20 depending on configuration, so staying with the proper size helps maintain the intended wheel-and-tire relationship and the visual balance of the SUV.
Owners trying to keep the vehicle close to its original presentation should first confirm whether it is a Base model or a w/Appearance Pkg. example. From there, matching the correct rim diameter and tire size is the foundation. If exact appearance authenticity is especially important, original sales literature or marque-specific references can help confirm how that particular configuration was equipped.
Which tire setup suits a period-appropriate 2013 Mercedes-Benz Trucks GL450?
A period-appropriate tire setup for a 2013 Mercedes-Benz Trucks GL450 starts with retaining the size that matches the vehicle’s original-style wheel package. That means 275/55R19 for the Base model or 275/50R20 for the w/Appearance Pkg. version. Because both are modern radial formats, the emphasis is on preserving the correct overall setup rather than choosing between vintage constructions.
The most faithful presentation usually comes from keeping the proper wheel diameter and avoiding size substitutions that change the visual proportion of the SUV. Buyers looking at a preservation-minded replacement should also pay attention to whether the vehicle still wears its intended wheels. A GL450 with changed wheels can look correct at a glance but still require a different tire path than its factory-style configuration.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2013 Mercedes-Benz Trucks GL450?
Yes, modifications can affect tire fitment on a 2013 Mercedes-Benz Trucks GL450. Wheel changes, suspension lowering, offset differences, or body alterations can all change the space available around a 275/55R19 or 275/50R20 tire. Even when the size sounds close to the original setup, the wheel and vehicle combination still needs to be checked carefully.
That matters because this GL450 already has two legitimate wheel-and-tire packages depending on sub-model, so a modified example may differ from either one. Clearance at the fender, inner wheelhouse, and steering range deserves attention before choosing replacement tires. On a vehicle with aftermarket wheels, measuring and verifying the current setup is far more reliable than assuming the original sub-model fitment still applies.
What should I inspect before driving a 2013 Mercedes-Benz Trucks GL450 on new tires?
Before driving a 2013 Mercedes-Benz Trucks GL450 on new tires, inspect the wheels for damage, confirm the correct 19-inch or 20-inch fitment, and make sure the old tires did not show signs of uneven wear. It is also wise to look over suspension and alignment-related components if the previous tires wore irregularly or the vehicle has been sitting.
A careful pre-drive check should include tire pressure, sidewall condition, tread seating, and any signs of rubbing once the vehicle is back on the ground. A short, slow test drive can help reveal vibration, pull, or clearance issues before regular use resumes. Catching those problems early protects the new tires and helps the GL450 deliver the composed road manners expected from this type of SUV.
How often should tires on a 2013 Mercedes-Benz Trucks GL450 be inspected?
Tires on a 2013 Mercedes-Benz Trucks GL450 should be inspected regularly, especially if the SUV sees mixed use or long periods of inactivity. A visual check for cracking, cuts, bulges, air loss, and uneven tread wear is worthwhile before routine driving, and a closer inspection should be part of normal maintenance even when mileage stays low.
Low-use vehicles can age their tires without wearing them out, so condition matters as much as tread depth. It also helps to watch for signs that point to alignment or suspension issues, since those can shorten the life of both 275/55R19 and 275/50R20 fitments. Consistent pressure checks and periodic inspections are simple habits that support safer, smoother road use.
