Mercedes-Benz CLS450 Tires

Mercedes-Benz CLS450 uses four sizes across the 2019 through 2023 range: 245/40R19 and 275/35R19 on 19-inch wheels, plus 245/35R20 and 275/30R20 on 20-inch wheels. The 245-width sizes are the front fitments, while the 275-width sizes are the rear fitments. All listed sizes are radial designs, and the layout is staggered rather than a same-size setup at all four corners.

That means the correct choice depends on both wheel diameter and axle position. A 19-inch car should keep the 245/40R19 front and 275/35R19 rear pairing, while a 20-inch car should keep the 245/35R20 front and 275/30R20 rear pairing. Checking the sidewall on the car now is the fastest way to confirm what is installed before replacing a single tire or a full set.

A 2021 Mercedes-Benz CLS450 has four tire sizes listed because the model appears with two different staggered wheel packages in the same model year. One package uses 19-inch wheels with 245/40R19 front and 275/35R19 rear tires. The other uses 20-inch wheels with 245/35R20 front and 275/30R20 rear tires.

The practical point is that the year alone does not identify the correct size. You need to confirm the wheel diameter on the car and then match the front and rear axle sizes to that package. If the car has been modified with non-original wheels, measure the actual rim diameter and compare the current tire sidewall markings before replacing anything.

Mercedes-Benz CLS450 uses either 19-inch or 20-inch wheels across the 2019 to 2023 range. The 19-inch setup pairs 245/40R19 in front with 275/35R19 in back, while the 20-inch setup pairs 245/35R20 in front with 275/30R20 in back. There is no year break here; both diameters appear throughout the full span.

That makes wheel diameter the first thing to verify before choosing tires. Read the existing tire size on the car or inspect the wheel markings directly, then replace with the matching front and rear sizes for that diameter. Mixing 19-inch and 20-inch tires on the wrong wheels is not a fitment variation; it is simply the wrong tire for the rim.

A 2020 Mercedes-Benz CLS450 can use either the 19-inch staggered setup or the 20-inch staggered setup, so the correct tire size is confirmed by checking the wheel diameter and the existing front and rear tire markings. The 19-inch pairing is 245/40R19 front and 275/35R19 rear. The 20-inch pairing is 245/35R20 front and 275/30R20 rear.

Start at the car rather than the model year alone. Check one front tire and one rear tire, then verify that both sizes belong to the same wheel-diameter package. That matters especially when replacing only two tires, because the front and rear sizes are intentionally different and should remain matched to the wheel package the car is actually using.

Mercedes-Benz CLS450 tires in the listed sizes are available as blackwall radials. No whitewall or specialty sidewall treatment appears in these fitments. That matches the modern performance-luxury character of the model, where blackwall styling is the expected visual choice.

For most owners, that makes the decision simpler because appearance differences come from tread line and brand rather than sidewall color. The more important selection factors are the correct 19-inch or 20-inch package, front versus rear size, and whether you want a more performance-focused summer-style option or a broader-use radial within the available lines.

Mercedes-Benz CLS450 tires in these sizes are available from BFGoodrich and Nitto. BFGoodrich appears in several g-Force variants and the g-Force Phenom T/A line, while Nitto is represented by the NT555 G2. All of the listed products are radial blackwall tires sized for the CLS450's 19-inch and 20-inch staggered packages.

Brand choice becomes a matter of which size you need and which performance character suits the car's use. Some sizes have more product choices than others, so it is worth confirming the exact front or rear size first. Once the fitment is settled, compare the available series within that size rather than assuming every product line is offered in all four CLS450 fitments.

Mercedes-Benz CLS450 fitments are offered here in four distinct tire series: BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Phenom T/A, and Nitto NT555 G2. All are radial designs, but they represent different product families within modern performance street tires. Some sizes are available in several of these series, while others have only one listed option.

That means series selection should come after fitment selection. First identify whether the car needs the 19-inch or 20-inch front and rear pair, then compare the available series in that specific size. If you are replacing a pair on one axle, keeping both tires on that axle in the same series is the cleaner approach for consistent response and appearance.

A Mercedes-Benz CLS450 should be stored on clean, properly inflated tires in a cool, dry, dark space away from direct sunlight, ozone sources, and large swings in temperature. Keeping the car on a clean concrete floor or on tire cradles is helpful for a vehicle that sits for long periods. If the car is parked for months at a time, avoid letting one section of each tire carry the load indefinitely.

For practical care, check inflation before storage and again before driving. Rolling the car periodically can reduce flat spotting, and moving it just enough to change the tire contact patch is often worthwhile on low-use enthusiast cars. Storage habits matter on a staggered-wheel Mercedes-Benz CLS450 because replacement sizes and wheel packages should stay matched front to rear.

Tires on a Mercedes-Benz CLS450 should be inspected regularly even if the car covers very few miles. A visual check every month is reasonable, with closer inspection before any highway trip or after long storage. Look for uneven wear, sidewall cracking, punctures, impact damage, and any sign that one axle is wearing differently from the other.

Because Mercedes-Benz CLS450 uses staggered sizing, wear patterns can tell you a great deal about alignment, inflation, and suspension condition. Compare left to right on each axle and make sure the front tires still match each other and the rear tires still match each other. Any vibration, pull, or visible shoulder wear deserves attention before continued use at normal road speeds.

Tires on a Mercedes-Benz CLS450 should be replaced when age, cracking, impact damage, or structural concerns appear, even if the remaining tread depth looks acceptable. Tread alone is not the full measure of serviceability on a car that may sit for extended periods. Heat cycles, storage conditions, and time all affect rubber performance well before the tread is worn out.

The practical approach is to inspect the date codes and overall condition whenever the car is serviced. If the tires are aging out, replace them as a matched front pair or rear pair at minimum, and as a full set when overall age is similar. On a staggered Mercedes-Benz CLS450, delaying replacement because the tread still looks good can leave an otherwise capable car riding on hardened, compromised rubber.

The listed Mercedes-Benz CLS450 tires are modern radial road tires in the correct 19-inch and 20-inch fitments, so they are intended for normal public-road use when they are properly installed on the correct wheels and maintained in good condition. Safety depends on correct size selection, matching the front and rear staggered layout, proper inflation, and overall tire condition rather than size alone.

Before regular road use, make sure the car has the correct pair for its wheel package: 245/40R19 with 275/35R19, or 245/35R20 with 275/30R20. Also check for age-related hardening, damage, and uneven wear. A modern performance sedan like Mercedes-Benz CLS450 can mask tire problems until emergency braking or wet-weather handling exposes them, so condition matters as much as fitment.

Before driving a Mercedes-Benz CLS450, check cold inflation pressure, confirm there is no visible sidewall or tread damage, and verify that the front and rear tire sizes match the wheel package on the car. A quick inspection should also include tread depth across the width of each tire and a look for nails, cuts, bulges, or cords showing through.

On a car with staggered sizes, it is especially important not to assume the front and rear are interchangeable. Compare the installed sizes to the markings on each axle and make sure a 19-inch front-rear pair has not been mixed with a 20-inch pair. If anything feels off in steering response, braking, or ride quality, inspect the tires before adding more miles.

A Mercedes-Benz CLS450 should only be driven at speeds appropriate for the tire condition, inflation, and installed size, even though the listed fitments are modern high-performance radials. The lettered service description on the individual tire also matters, since load and speed capability are product-specific. A tire in poor condition or with uneven wear is never suitable for higher-speed use simply because the size is correct.

The smart practice is to treat tire condition as the limiting factor, not the car's performance potential. If the tires are aging, damaged, underinflated, or mismatched across a staggered setup, reduce speed and correct the issue before regular driving. Mercedes-Benz CLS450 is capable enough that a small tire problem can become a large handling problem quickly, especially in wet conditions.