Mercedes-Benz S400 Tires

Mercedes-Benz S400 uses five tire sizes across the 2010 through 2013 model years: 255/45R18 on 18-inch wheels, 255/40R19 and 275/40R19 on 19-inch wheels, and 255/35R20 and 275/35R20 on 20-inch wheels. All five sizes appear across the full 2010-2013 span rather than being limited to one isolated year.

That means the correct tire for a Mercedes-Benz S400 depends on the wheel package fitted to the individual car, not just the model year. Start by reading the size on the current tire and confirming the wheel diameter, then check whether the car uses a same-size setup or a wider paired size on one axle.

On a Mercedes-Benz S400, 255/45R18 is a modern metric radial size. The 255 is the tire's section width in millimeters, 45 is the aspect ratio that describes sidewall height as a percentage of width, R identifies radial construction, and 18 is the required rim diameter in inches.

The same logic applies to the other Mercedes-Benz S400 sizes on this page, including 255/40R19, 275/40R19, 255/35R20, and 275/35R20. Once you understand the code, the key fitment step is matching the final number to the actual wheel diameter and making sure the width and profile correspond to the car's front or rear wheel setup.

A 2010 Mercedes-Benz S400 has five tire sizes listed because the model appears with multiple wheel-diameter fitments in the same year. The split is a rim-diameter split, covering 18-inch, 19-inch, and 20-inch wheels, with both 255-width and 275-width sizes represented on the larger wheel packages.

That usually means you cannot identify the correct tire by year alone. Check the wheels already on the car, confirm whether the front and rear tires are the same size or staggered, and then match the replacement tire to that exact configuration instead of assuming every 2010 Mercedes-Benz S400 used one setup.

Mercedes-Benz S400 uses three rim diameters within the 2010-2013 range: 18 inches, 19 inches, and 20 inches. The 255/45R18 size belongs on 18-inch wheels, 255/40R19 and 275/40R19 belong on 19-inch wheels, and 255/35R20 and 275/35R20 belong on 20-inch wheels.

Because all three diameters appear throughout the same production years, the wheel itself is the first thing to verify. A Mercedes-Benz S400 owner should confirm the rim marking or the existing tire size before choosing replacements, since a tire for one wheel diameter cannot be safely substituted onto another.

A 2012 Mercedes-Benz S400 can use 255/45R18, 255/40R19, 275/40R19, 255/35R20, or 275/35R20, so the correct choice depends on the wheel package fitted to that specific car. The decisive checks are the tire size currently mounted, the wheel diameter, and whether the front and rear axle use matching or staggered widths.

Look at the sidewall of each tire and compare front to rear before replacing anything. If the Mercedes-Benz S400 has different front and rear sizes, replace each position with the matching size and keep the same wheel-diameter family rather than trying to standardize the car around a different package.

Mercedes-Benz S400 tires in these sizes are available in Blackwall, RWL, and Redline sidewall styles. Blackwall appears across all five sizes, while select Pro-Trac Street Pro III offerings add raised white letters and redline alternatives in the 18-inch, 19-inch, and 20-inch fitments shown here.

For a factory-looking late-model luxury sedan, blackwall is the most natural visual choice. RWL and redline options can give a Mercedes-Benz S400 a more customized appearance, so buyers should decide whether they want an understated OE-style look or a more personalized presentation before choosing among the available versions.

Mercedes-Benz S400 tire options here come from BFGoodrich, Nitto, and Pro-Trac. Across the five sizes, BFGoodrich appears in several g-Force and Phenom series offerings, Nitto appears in the NT555 G2 line, and Pro-Trac appears in Street Pro III versions with multiple sidewall treatments.

That mix gives a Mercedes-Benz S400 owner room to choose between different tread families and visual styles while staying within the correct size. Once the fitment is confirmed, comparing brand and series choices becomes a matter of intended use, appearance preference, and whether the car is being kept more original-looking or more customized.

Mercedes-Benz S400 tire series shown here include BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Phenom T/A, Nitto NT555 G2, and Pro-Trac Street Pro III. All are radial tires, but they represent different product families, with some emphasizing all-season coverage, some built around performance-oriented g-Force naming, and Pro-Trac adding alternate sidewall styling choices.

For a Mercedes-Benz S400 owner, the important point is to choose the correct size first and then compare the available series within that exact fitment. If appearance matters as much as tread character, Street Pro III may stand out because it is offered in RWL and redline versions, while the others are presented as blackwall tires.

A Mercedes-Benz S400 should be stored on a clean, dry surface away from direct sunlight, ozone sources, and large temperature swings when the tires are fitted. Keeping the tires properly inflated and the car out of standing moisture helps preserve the casing and prevents flat-spotting during longer periods of inactivity.

If the Mercedes-Benz S400 sits for extended stretches, move it periodically or support it in a way that reduces prolonged load on one contact patch. Good storage habits matter even with modern radial tires, especially on a collector or low-use example that may spend far more time parked than driven.

Tires on a Mercedes-Benz S400 should be inspected regularly for pressure loss, uneven wear, sidewall damage, and signs of aging such as cracking or hardening. A visual check before drives and a more careful inspection at routine service intervals is a sensible pattern for a heavy, high-speed-capable luxury sedan.

That inspection should include both axles, because a staggered Mercedes-Benz S400 setup can hide different wear patterns front to rear. Catching wear early helps you correct alignment, inflation, or rotation issues before they shorten tire life or alter how the car rides and responds on the road.

Mercedes-Benz S400 tires should be replaced when they show age cracking, impact damage, persistent vibration, irregular wear, or any structural concern, even if tread depth still looks acceptable. Low-mile collector cars are especially prone to aging out tires before they wear them out, and the calendar matters as much as the tread surface.

A Mercedes-Benz S400 owner should treat age, storage history, and condition as part of the replacement decision rather than relying on appearance alone. If the car has sat for long periods or the tires feel hardened and no longer ride smoothly, replacement is the prudent step even when the grooves still look serviceable.

Mercedes-Benz S400 appears here with five size options across 2010-2013: 255/45R18, 255/40R19, 275/40R19, 255/35R20, and 275/35R20. Those sizes indicate that more than one wheel and tire package was used during the model's run, rather than a single universal fitment for every car.

For an authenticity-minded Mercedes-Benz S400 owner, the best reference is the car itself along with factory literature, window sticker information, or marque records tied to the VIN and wheel package. That approach helps preserve the original stance and appearance instead of fitting a size that belongs to a different package from the same year.

Correct tire fitment can affect how a Mercedes-Benz S400 is viewed in serious preservation or marque-focused judging, especially when wheel diameter, tire profile, and sidewall presentation change the car's original look. Even on newer collector cars, the wrong overall visual package can stand out immediately to informed judges and enthusiasts.

For that reason, a Mercedes-Benz S400 owner aiming for authenticity should match the original wheel package and choose a sidewall style that suits the car's intended presentation. Marque clubs, factory literature, and period photos are useful references when the goal is to keep the car visually consistent with how it would have appeared when new.

Mercedes-Benz S400 tires here are available in Blackwall, RWL, and Redline styles, but blackwall is the most restrained and era-appropriate look for a modern luxury sedan. RWL and redline options are present in several sizes, though they read more as personalization choices than a stock-style presentation.

A Mercedes-Benz S400 owner restoring the car to a factory-like appearance will usually gravitate toward blackwall tires in the correct size for the wheel package. RWL or redline can still be appealing on a customized build, but they will create a noticeably different visual impression from a more original late-model Mercedes-Benz flagship look.

These Mercedes-Benz S400 tires are modern radial designs intended for public-road use when they are the correct size for the wheel, are in sound condition, and are mounted and inflated properly. Safety depends on matching the tire to the correct 18-inch, 19-inch, or 20-inch wheel package and maintaining the car's fitment balance across both axles.

A Mercedes-Benz S400 owner should think of tire safety as a complete system that includes age, pressure, suspension condition, and alignment rather than size alone. If the car uses staggered widths, preserving the intended front-to-rear sizing is especially important for predictable handling and braking behavior.

Before driving a Mercedes-Benz S400, check tire pressure, visible sidewall condition, tread wear, and whether all four tires match the wheel diameters actually fitted to the car. On cars using 19-inch or 20-inch packages, also confirm that the front and rear sizes are installed in their proper positions if the car is staggered.

That quick inspection helps catch underinflation, damage, or an incorrect replacement before it affects ride quality or stability. Because Mercedes-Benz S400 can appear with several size combinations in the same production years, a careful owner should never assume the last set installed was automatically the correct one.

A Mercedes-Benz S400 should only be driven at speeds appropriate to the exact tire installed, its condition, and the load it is carrying. The tires listed here include modern radial products with speed-rated designations in their marked sizes, but real-world safe speed still depends on proper inflation, age, condition, and whether the correct front and rear fitment has been maintained.

For a low-use or collector Mercedes-Benz S400, conservative operation is wise until the tires have been fully inspected and the wheel package verified. Even a high-end sedan can feel unsettled if it is running mismatched sizes, aged rubber, or tires that do not belong on the wheel diameter currently fitted to the car.