The 2014 Mercedes-Benz Trucks GLK350 blends compact luxury SUV packaging with the upright, squared-off look that set the GLK apart from softer crossover styling of its time. Buyers often appreciate it as a modern daily driver with a more traditional Mercedes character, which makes correct tire fitment especially important. This GLK350 uses radial tires in two primary sizes, 235/50R19 and 235/45R20, so the first step is confirming which wheel diameter is on the vehicle. Because both sizes share the same section width but fit different rims, the decision comes down to wheel setup, appearance, and maintaining proper clearance and overall proportions.
Which Tire Size Is Right for The 2014 Mercedes-Benz Trucks GLK350
Two primary tire sizes apply to the 2014 Mercedes-Benz Trucks GLK350, and both are radial fitments. The key difference is wheel diameter: one size fits a 19-inch rim and the other fits a 20-inch rim. Since both the Base and 4Matic versions can use either size, the first thing to confirm is the actual wheel setup on the vehicle before comparing tire choices.
A 235/45R20 tire uses a 235-millimeter section width, a 45-series aspect ratio, radial construction, and a 20-inch rim. On the 2014 Mercedes-Benz Trucks GLK350, this size suits vehicles equipped with the larger wheel package while keeping a modern metric radial format familiar to current buyers. Its lower-profile sidewall gives this fitment a distinctly different visual character from the 19-inch option, even though section width remains the same. Choosing this size starts with verifying that the GLK350 is actually riding on 20-inch wheels and that the overall setup still has proper clearance.
A 235/50R19 tire also uses a 235-millimeter section width and radial construction, but it fits a 19-inch rim and carries a taller sidewall than the 20-inch alternative. For the 2014 Mercedes-Benz Trucks GLK350, this size represents the other primary wheel-and-tire configuration used across the model range. The sizing format is straightforward for modern replacement shopping, with the rim diameter being the most important distinction. This size is the right one to evaluate only after confirming that the vehicle has 19-inch wheels rather than a 20-inch setup.
Tire fitment is straightforward across the covered GLK350 sub-models because both the Base and 4Matic versions can use the same two radial sizes. The important step is not trim identification as much as confirming whether the vehicle is equipped with 19-inch or 20-inch wheels.
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2014 Mercedes-Benz Trucks GLK350 4Matic
The GLK350 4Matic can use either of the two primary radial tire sizes offered for this model year. Tire selection starts with checking whether the vehicle has 19-inch or 20-inch wheels, then choosing a replacement that matches the existing wheel diameter and intended road use.
The GLK350 Base also uses the same two primary radial fitments found elsewhere in the model range. That makes wheel confirmation the central step, followed by choosing the tire size that matches the current rim diameter and preserves proper fitment at the wheel wells and suspension.
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 tire sizes used on the 2014 Mercedes-Benz Trucks GLK350, how to confirm the correct rim fitment, and what to check before replacing tires on a vehicle that may have seen wheel or suspension changes over time.
Tire Size & Fitment
What tire size fits a 2014 Mercedes-Benz Trucks GLK350?
The 2014 Mercedes-Benz Trucks GLK350 uses two primary tire sizes: 235/50R19 and 235/45R20. Both are radial sizes, and both apply across the GLK350 range, including Base and 4Matic versions. The correct one depends on which wheel diameter is currently on the vehicle.
That means the most important fitment step is checking the actual wheels rather than assuming one size by trim name alone. A GLK350 on 19-inch rims needs 235/50R19, while a GLK350 on 20-inch rims needs 235/45R20. If the vehicle has aftermarket wheels, confirm the tire size already installed, the wheel diameter stamped on the rim, and available clearance before ordering replacements.
What size rim does a 2014 Mercedes-Benz Trucks GLK350 use?
A 2014 Mercedes-Benz Trucks GLK350 uses either a 19-inch or 20-inch rim, depending on the tire setup. The 235/50R19 size fits a 19-inch rim, and the 235/45R20 size fits a 20-inch rim. Both configurations are radial fitments for this model.
Rim diameter needs to match the tire size exactly, so this is not an area for guesswork. Checking the wheel itself is the quickest way to avoid buying the wrong tire. If the GLK350 has had a wheel swap, use the actual rim diameter on the vehicle today rather than relying on model-year assumptions, and inspect for any changes in offset or clearance at the same time.
Do all 2014 Mercedes-Benz Trucks GLK350 sub-models use the same tire size?
The covered sub-models share the same fitment range rather than a single exclusive size. Both the 2014 Mercedes-Benz Trucks GLK350 Base and the 2014 Mercedes-Benz Trucks GLK350 4Matic can use 235/50R19 or 235/45R20, with the deciding factor being wheel diameter.
That makes this a wheel-confirmation question more than a sub-model question. A buyer should still verify the exact setup on the vehicle, because two GLK350s with different wheel packages may need different tires even when they share the same year and model name. Looking at the existing tire sidewall and measuring the rim diameter helps prevent ordering the wrong size.
Choosing the Right Tire
What should I consider when choosing a tire for a 2014 Mercedes-Benz Trucks GLK350?
Start with the correct primary size for the vehicle's current wheels: 235/50R19 for 19-inch rims or 235/45R20 for 20-inch rims. Both are radial fitments, so the main selection issue is matching the tire to the wheel diameter already on the GLK350 and staying within the intended fitment envelope.
After size confirmation, compare how the vehicle is used and whether the setup is still stock. A GLK350 driven mainly on daily roads may call for a different replacement emphasis than one used only occasionally. It also helps to inspect wheel condition, look for uneven tire wear, and confirm that no suspension or wheel changes have altered the amount of room around the tire.
How do I choose between the available 235/50R19 and 235/45R20 tires for a 2014 Mercedes-Benz Trucks GLK350?
The choice is made by wheel diameter, not by personal preference alone. A 2014 Mercedes-Benz Trucks GLK350 with 19-inch wheels uses 235/50R19, while one with 20-inch wheels uses 235/45R20. These sizes are close in overall diameter, but they are built for different rim diameters.
Once the correct wheel size is confirmed, compare the replacement tire's intended use and the vehicle's current condition. The 20-inch setup carries a shorter sidewall, while the 19-inch setup carries a taller one, so matching the existing configuration matters. Checking for prior wheel changes, curb damage, and any rubbing marks in the wheel wells adds another layer of confidence before installation.
Why does the 2014 Mercedes-Benz Trucks GLK350 have more than one tire size?
The 2014 Mercedes-Benz Trucks GLK350 was fitted with more than one wheel-and-tire package, which is why both 235/50R19 and 235/45R20 are correct primary sizes. Both are radial tires, and both share the same 235-millimeter section width, but they are paired with different rim diameters.
For the owner, that means the real task is identifying the exact wheel setup on the vehicle today. A GLK350 may still be on its original wheel package, or it may have been changed at some point. Looking at the sidewall size marking and confirming the wheel diameter prevents confusion and keeps the replacement process centered on the actual fitment rather than assumptions.
Restoration & Appearance
Does correct tire fitment matter for a 2014 Mercedes-Benz Trucks GLK350 restoration or preservation project?
Yes. Even though the 2014 Mercedes-Benz Trucks GLK350 is a newer vehicle than traditional collector cars, correct tire fitment still matters if the goal is to preserve its intended stance and presentation. The two proper sizes, 235/50R19 and 235/45R20, correspond to different wheel packages and give the vehicle a different visual balance.
A preservation-minded owner should confirm which wheel package belongs on that particular GLK350 before replacing tires. Keeping the correct size for the installed wheels helps maintain the proportions Mercedes gave the vehicle. If originality matters beyond basic fitment, compare the current setup with period photos, original window-sticker information, or marque-specific reference material before making changes.
How does tire size affect the appearance of a 2014 Mercedes-Benz Trucks GLK350?
On a 2014 Mercedes-Benz Trucks GLK350, the visible difference comes mainly from the relationship between tire sidewall height and wheel diameter. The 235/50R19 size places more sidewall around a 19-inch wheel, while the 235/45R20 size wraps a shorter sidewall around a 20-inch wheel. Both remain proper primary fitments.
That visual difference can matter to owners who want to retain the GLK's original character rather than simply replace worn tires. The 20-inch setup typically presents a larger-wheel look, while the 19-inch setup keeps a fuller sidewall presence. Matching the vehicle's existing wheels is the first priority, and any appearance-driven wheel change should be checked carefully for clearance and overall compatibility.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2014 Mercedes-Benz Trucks GLK350?
Yes. Wheel changes, suspension lowering, spacer use, or other aftermarket modifications can affect tire fitment on a 2014 Mercedes-Benz Trucks GLK350 even when the tire size itself looks close to stock. Since this model uses either 235/50R19 or 235/45R20, the actual wheel dimensions and available space around the tire still matter.
A modified GLK350 should be checked for wheel diameter, width, offset, and any signs of rubbing at the fenders or inner suspension areas. Steering clearance is especially important on front tires. Verifying the current setup before replacing tires helps avoid a situation where the nominal size is correct on paper but the vehicle's altered hardware leaves less room than expected.
What should I inspect before driving a 2014 Mercedes-Benz Trucks GLK350 on new tires?
Before road use, inspect the wheels for damage, make sure the new tires match the vehicle's actual rim diameter, and confirm that inflation is set appropriately for the installed tires and vehicle use. It also helps to look over the suspension and alignment condition, especially if the old tires showed uneven wear.
A short check for rubbing during full steering lock and over mild suspension movement can catch clearance issues early. The GLK350 may also benefit from a fresh alignment check after tire replacement, particularly if it has encountered potholes or curb impacts. A careful inspection at installation makes the new tires more likely to wear evenly and behave consistently on the road.
How often should tires on a 2014 Mercedes-Benz Trucks GLK350 be inspected?
Tires on a 2014 Mercedes-Benz Trucks GLK350 should be inspected regularly, not just when tread looks low. A monthly pressure and condition check is a sensible routine, with closer inspection before longer trips or after impacts with potholes, curbs, or road debris. Radial tires can lose condition through age and damage as well as normal wear.
Look for uneven tread wear, cuts, bulges, cracking, and slow air loss, and compare all four tires for consistency. Vehicles that are driven less often can still develop age-related issues, so low mileage does not eliminate the need for inspection. Catching problems early helps preserve ride quality, maintain safe clearance, and prevent a small tire issue from becoming a roadside interruption.
