The 2019 Mercedes-Benz CLS450 carries forward the CLS formula of coupe-like styling blended with midsize luxury-sedan comfort, so tire choice affects both appearance and the way the car presents itself on the road. On this model, the key fitment question is not simply size, but whether the car is running the 19-inch or 20-inch staggered setup. Front sizes are 245/40R19 or 245/35R20, while rear sizes are 275/35R19 or 275/30R20, all in radial construction. Available choices center on modern blackwall performance radials from BFGoodrich and Nitto across several series. Before selecting tires, confirm the wheel diameter and match the front and rear pairing correctly.
Which Tire Size Is Right for The 2019 Mercedes-Benz CLS450
The 2019 Mercedes-Benz CLS450 uses four primary tire sizes because fitment is staggered front to rear and also split between 19-inch and 20-inch wheel packages. The first step is confirming wheel diameter, then matching the correct front and rear sizes as a set. All primary fitments are radial, so the real decision comes down to the exact wheel setup and the tire series you want within those sizes.
245/35R20 is a metric radial size in which 245 identifies the nominal section width in millimeters, 35 is the aspect ratio, R denotes radial construction, and 20 is the rim diameter in inches. On the 2019 Mercedes-Benz CLS450, this is a front fitment used with the 20-inch staggered setup. Available choices include BFGoodrich and Nitto blackwall tires across g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2 lines. This size is the one to evaluate when the car has 20-inch front wheels and you want to compare series, load specification, and intended road use.
245/40R19 is a metric radial size where 245 is the nominal section width in millimeters, 40 is the profile ratio, R indicates radial construction, and 19 is the wheel diameter in inches. For the 2019 Mercedes-Benz CLS450, this size serves the front position on the 19-inch staggered setup. BFGoodrich offers several blackwall choices here, including g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A. This is the front size to consider when the car is equipped with 19-inch wheels and you want to stay with the proper front-to-rear pairing.
275/30R20 is a metric radial size with a 275-millimeter nominal section width, a 30-series profile, radial construction, and a 20-inch rim diameter. On the 2019 Mercedes-Benz CLS450, this is a rear fitment for the 20-inch staggered arrangement, pairing with 245/35R20 in front. The available product choice in this size centers on a blackwall Nitto NT555 G2, making the decision more about matching the correct rear size and intended tire character than comparing many sidewall or series options. It should be chosen only after confirming that the car is using the 20-inch rear wheel setup.
275/35R19 is a metric radial size in which 275 gives the nominal section width in millimeters, 35 is the aspect ratio, R marks radial construction, and 19 is the wheel diameter. For the 2019 Mercedes-Benz CLS450, this size fits the rear position on the 19-inch staggered package and pairs with 245/40R19 up front. BFGoodrich and Nitto both appear in this size, with blackwall choices across g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and NT555 G2. This rear size matters when preserving the proper 19-inch staggered balance rather than mixing unmatched front and rear fitments.
Sub-model fitment on the 2019 Mercedes-Benz CLS450 is straightforward in one sense and setup-specific in another. Base and 4Matic configurations share the same front and rear size pairings, but the correct tires still depend on whether the car is using the 19-inch or 20-inch staggered wheel package.
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2019 Mercedes-Benz CLS450 4Matic Front
The 2019 Mercedes-Benz CLS450 4Matic Front uses the same front fitment pattern as the Base Front, with a choice between the 19-inch and 20-inch front sizes. Tire selection here starts with confirming wheel diameter, then choosing among the available blackwall radial series in the matching front size.
The 2019 Mercedes-Benz CLS450 4Matic Rear follows the same staggered rear sizing pattern as the Base Rear, with one rear size for 19-inch wheels and another for 20-inch wheels. The practical goal is keeping the rear tire matched to the front setup rather than selecting a rear size in isolation.
The 2019 Mercedes-Benz CLS450 Base Front uses the same two front size options as the 4Matic Front, tied to either a 19-inch or 20-inch wheel package. That means the main buying decision is wheel confirmation first, followed by selecting the tire series that suits the car's intended road use.
The 2019 Mercedes-Benz CLS450 Base Rear shares its rear tire pattern with the 4Matic Rear, using one size with the 19-inch setup and another with the 20-inch setup. Matching the proper rear size to the front fitment is essential for maintaining the intended staggered arrangement.
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.
Best 2019 Mercedes-Benz CLS450 Tires for Sale
Available 2019 Mercedes-Benz CLS450 tire choices focus on modern blackwall radial performance tires from BFGoodrich and Nitto. Depending on size, the product grid lets you compare g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2 options across the 19-inch and 20-inch staggered fitments.
Common 2019 Mercedes-Benz CLS450 tire questions usually come down to staggered front and rear sizing, 19-inch versus 20-inch wheel fitment, and how to compare the available blackwall radial tire series for the correct setup.
Tire Size & Fitment
What tire size fits a 2019 Mercedes-Benz CLS450?
The 2019 Mercedes-Benz CLS450 uses a staggered tire setup, so front and rear sizes are different. Front fitments are 245/40R19 or 245/35R20, and rear fitments are 275/35R19 or 275/30R20. All of these are radial sizes.
The correct choice depends on the wheel package already on the car. A 19-inch setup uses 245/40R19 in front and 275/35R19 in back, while a 20-inch setup uses 245/35R20 in front and 275/30R20 in back. Checking the actual wheel diameter on the vehicle is the first step before comparing brands or tire series.
What size rim does a 2019 Mercedes-Benz CLS450 use?
A 2019 Mercedes-Benz CLS450 uses either 19-inch or 20-inch rims, depending on the tire and wheel package on the car. The 245/40R19 and 275/35R19 sizes fit 19-inch wheels, while the 245/35R20 and 275/30R20 sizes fit 20-inch wheels.
That means rim diameter has to be confirmed before choosing tires, especially on a staggered setup where front and rear widths already differ. Looking only at tread width is not enough. Verify the wheel diameter stamped on the wheel or match the existing tire size exactly before moving on to series, load, or brand comparisons.
Do all 2019 Mercedes-Benz CLS450 sub-models use the same tire size?
Base and 4Matic versions of the 2019 Mercedes-Benz CLS450 follow the same fitment pattern, but not a single universal tire size. Both use staggered front and rear sizing, with one front and one rear size for the 19-inch setup and another front and rear size for the 20-inch setup.
The practical takeaway is that the sub-model name alone does not settle the tire choice. The wheel package matters just as much. Once the car's 19-inch or 20-inch setup is confirmed, the correct front and rear pair can be matched properly without mixing sizes from two different staggered combinations.
Choosing the Right Tire
What should I consider when choosing a 2019 Mercedes-Benz CLS450 tire?
Start with the exact staggered size pairing already on the car, since the 2019 Mercedes-Benz CLS450 uses different front and rear tires and can be equipped with either 19-inch or 20-inch wheels. After that, compare tire series, construction details, rim-width compatibility where stated, and load figures when they are shown.
A useful comparison also includes how the car is actually driven. Some choices in these sizes lean toward all-season or performance-focused lines, while others simply give you a different product character within the same basic fitment. The key is keeping the front and rear pair matched to the wheel package rather than selecting one tire size by itself.
What sidewall styles are available for 2019 Mercedes-Benz CLS450 tires?
The available tires for the 2019 Mercedes-Benz CLS450 use a blackwall sidewall style across the covered 19-inch and 20-inch sizes. That keeps the visual presentation consistent whether you are looking at BFGoodrich g-Force series options or the Nitto NT555 G2.
Since sidewall treatment is not the main point of variation here, the more important comparison is between size, wheel package, and tire series. Once the correct front and rear fitment is confirmed, the product decision becomes more about the specific radial line you want rather than choosing among multiple sidewall appearances.
What brands offer tires for the 2019 Mercedes-Benz CLS450?
BFGoodrich and Nitto both offer tires for the 2019 Mercedes-Benz CLS450 within the applicable 19-inch and 20-inch sizes. Depending on the exact size, choices include BFGoodrich g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and Nitto NT555 G2.
Brand choice should come after fitment confirmation, not before it. Some sizes have several options from both brands, while others are more limited. Comparing the correct size first will show whether the decision is mainly between multiple series in one size or simply selecting the one available product that matches the car's wheel setup.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Mercedes-Benz CLS450?
Yes, modifications can affect tire fitment on a 2019 Mercedes-Benz CLS450, especially because the car already uses a staggered setup and may be equipped with either 19-inch or 20-inch wheels. Aftermarket wheels, altered offsets, suspension changes, or ride-height changes can all change how the original tire sizes sit in the wheel openings.
That makes wheel confirmation more important than simply matching the original size label. Check actual wheel diameter and width, then inspect front steering clearance and rear fender room before changing tire dimensions. A modified car may still use one of the original sizes, but that should be verified against the current wheel and suspension setup.
What should I inspect before driving a 2019 Mercedes-Benz CLS450 on new tires?
Before driving a 2019 Mercedes-Benz CLS450 on new tires, confirm that the front and rear sizes match the car's staggered wheel package and that all four tires are mounted on the correct rim diameters. It is also smart to inspect valve stems, wheel condition, and visible clearance around suspension and body components.
Road use checks should continue with proper inflation, lug torque, and a quick look for rubbing during full steering lock if the car uses the front sizes. After a short drive, recheck air pressure and look for any uneven contact marks. On a vehicle with low-profile 19-inch or 20-inch tires, small fitment errors are worth catching early.
What should I check before a longer drive in a 2019 Mercedes-Benz CLS450?
A longer drive in a 2019 Mercedes-Benz CLS450 starts with basic tire condition and setup verification. Confirm that the car is running the correct front and rear size combination, inspect tread and sidewalls for cuts or bulges, and check pressures when the tires are cold.
It also helps to look at overall wheel and suspension condition before putting miles on a staggered luxury-performance car. Uneven wear, vibration, or air loss should be addressed before the trip rather than after it begins. If the car has been stored, give extra attention to age-related cracking and make sure each tire still holds pressure consistently.
