The 2019 Mercedes-Benz S450 sits in the modern S-Class tradition of long-wheelbase comfort, quiet high-speed composure, and substantial curbside presence. Buyers looking at one today are usually balancing luxury-car refinement with the need to preserve the car’s intended stance and road manners. Tire fitment on the 2019 Mercedes-Benz S450 is entirely radial, with both a square 245/50R18 setup and staggered 19-inch or 20-inch front-and-rear combinations depending on configuration. That creates meaningful choices in blackwall, redline, raised white letter, and performance-oriented tire series. The key is confirming whether the car carries the standard 18-inch setup or a staggered wheel package before comparing style and construction details.
Which Tire Size Is Right for The 2019 Mercedes-Benz S450
The 2019 Mercedes-Benz S450 uses five primary tire sizes, and the correct one depends on whether the car has the standard square setup or a staggered front-and-rear wheel package. Rim diameter is the first thing to confirm, since this model appears with 18-inch, 19-inch, and 20-inch fitments. Once that is settled, the real comparison shifts to front versus rear sizing, tire series, sidewall style, and wheel-width compatibility.
In 245/50R18, the 245 identifies nominal section width in millimeters, 50 is the aspect ratio, R denotes radial construction, and 18 is the wheel diameter in inches. On the 2019 Mercedes-Benz S450, this size suits the square 18-inch setup rather than the staggered front-and-rear arrangements. Available choices include Pro-Trac Street Pro III options with RWL or redline sidewall styling. This size is the one to evaluate when the car retains 18-inch wheels and a uniform tire size at all four corners.
The 245/40R20 size uses a 245-millimeter section width, a 40-series profile, radial construction, and a 20-inch rim diameter. On the 2019 Mercedes-Benz S450, it serves as a front fitment in the staggered 20-inch setup, so it should be matched with the correct rear size rather than treated as a full-vehicle fitment by itself. Product choices include blackwall performance tires from BFGoodrich and Nitto, plus Pro-Trac Street Pro III in RWL and redline form. This is the front size to confirm when the car is running 20-inch staggered wheels.
A 245/45R19 tire has a 245-millimeter nominal section width, a 45-series profile, radial construction, and a 19-inch wheel diameter. On the 2019 Mercedes-Benz S450, this size is used at the front in the staggered 19-inch arrangement, making it part of a matched front-and-rear combination. Available products center on blackwall performance radial options from BFGoodrich and Nitto across several g-Force and NT555 G2 lines. This is the size to consider when the car carries 19-inch front wheels and the corresponding wider rear fitment.
The 275/35R20 code indicates a wider 275-millimeter section width, a 35-series profile, radial construction, and a 20-inch rim. On the 2019 Mercedes-Benz S450, it functions as the rear tire in the staggered 20-inch setup, so it works as part of a front-and-rear pairing rather than as a standalone all-around size. Choices include blackwall performance tires from BFGoodrich and Nitto, along with Pro-Trac Street Pro III in RWL and redline styles. This rear size matters most when preserving the intended staggered look and wheel-to-tire relationship on 20-inch wheels.
In 275/40R19, the 275 marks the nominal section width in millimeters, 40 is the aspect ratio, R means radial, and 19 is the wheel diameter in inches. On the 2019 Mercedes-Benz S450, this is the rear component of the staggered 19-inch setup and should be matched to the proper 19-inch front size. Product selection focuses on blackwall performance radials from BFGoodrich and Nitto, including multiple g-Force series. This size is the right place to start when the car already has 19-inch rear wheels and a staggered factory-style presentation.
Sub-model fitment on the 2019 Mercedes-Benz S450 is split between a standard square setup and staggered front-and-rear applications. Checking the exact sub-model matters because the correct tire choice may depend on whether the car uses the same size at all four corners or different front and rear sizes on 19-inch or 20-inch wheels.
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2019 Mercedes-Benz S450 4Matic
The 2019 Mercedes-Benz S450 4Matic uses the square 245/50R18 radial setup. Tire selection here is more straightforward than on the staggered versions, so the decision usually comes down to confirming the 18-inch wheels and choosing the sidewall style that suits the car’s presentation.
The 2019 Mercedes-Benz S450 4Matic Front uses either a 245/40R20 or 245/45R19 radial depending on which staggered wheel package is on the car. Wheel diameter needs to be confirmed first, then the front tire can be matched correctly to the corresponding rear size and tire series.
The 2019 Mercedes-Benz S450 4Matic Rear uses either 275/35R20 or 275/40R19 in a staggered radial arrangement. Rear tire selection should follow the actual wheel diameter on the car and stay coordinated with the front fitment rather than being chosen in isolation.
The 2019 Mercedes-Benz S450 Base uses the same 245/50R18 radial size as the square 18-inch 4Matic application. That keeps fitment simple, with the main choice centered on sidewall appearance and whether a traditional redline or raised white letter treatment fits the look you want.
The 2019 Mercedes-Benz S450 Base Front uses either 245/40R20 or 245/45R19 as part of a staggered radial setup. Choosing correctly starts with verifying whether the car is on 19-inch or 20-inch front wheels, then pairing that front size with the proper rear fitment.
The 2019 Mercedes-Benz S450 Base Rear uses either 275/35R20 or 275/40R19 in the staggered rear position. The practical concern is matching the rear tire to the installed wheel diameter and keeping the front-and-rear combination consistent with the car’s existing setup.
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 S450 Tires for Sale
Available 2019 Mercedes-Benz S450 tire choices span Pro-Trac, BFGoodrich, and Nitto across Street Pro III, g-Force, and NT555 G2 lines. Depending on size, the comparison may include blackwall, redline, or raised white letter sidewalls along with differences in rim-width specifications and load figures.
Owners of a 2019 Mercedes-Benz S450 usually need to sort out wheel diameter, square versus staggered fitment, and the difference between front and rear tire sizes. The questions below focus on size selection, rim fitment, sidewall and brand choices, and the checks worth making before road use.
Tire Size & Fitment
What tire size fits a 2019 Mercedes-Benz S450?
The 2019 Mercedes-Benz S450 uses several radial tire sizes: 245/50R18, 245/40R20, 245/45R19, 275/35R20, and 275/40R19. The 245/50R18 size belongs to the square setup, while the 19-inch and 20-inch combinations use narrower front tires and wider rear tires in staggered form.
The important step is identifying the actual wheel package on the car before choosing tires. An S450 with 18-inch wheels takes the same size at all four corners, but a car with 19-inch or 20-inch wheels needs the correct front-and-rear pairing to maintain proper fitment and overall balance.
What size rim does a 2019 Mercedes-Benz S450 use?
A 2019 Mercedes-Benz S450 appears with 18-inch, 19-inch, and 20-inch rim diameters depending on configuration. The 245/50R18 size uses an 18-inch rim, the 245/45R19 and 275/40R19 sizes use 19-inch rims, and the 245/40R20 and 275/35R20 sizes use 20-inch rims.
Rim diameter should be confirmed before anything else because the S450 does not use a single wheel size across every setup. Checking the tire sidewall and measuring the installed wheel package helps prevent ordering a front or rear tire that belongs to a different staggered combination.
Why does the 2019 Mercedes-Benz S450 have more than one tire size?
More than one tire size appears on the 2019 Mercedes-Benz S450 because some versions use a square 18-inch arrangement while others use staggered 19-inch or 20-inch front-and-rear setups. In the staggered combinations, the front tire is narrower than the rear and each end of the car uses a different size.
That means tire selection starts with the actual wheel and tire layout on the vehicle, not just the model name. Looking only at year, make, and model can miss whether the car is square or staggered, so the existing front and rear sidewall markings should be checked before replacing a set.
Choosing the Right Tire
What should I consider when choosing a 2019 Mercedes-Benz S450 tire?
Start with the correct tire size for the exact wheel package, then compare construction, rim compatibility, sidewall style, and tire series. The 2019 Mercedes-Benz S450 uses only radial tires, but the right choice still depends on whether the car has the square 245/50R18 setup or a staggered 19-inch or 20-inch arrangement.
After size is confirmed, think about how the car is used and how you want it to look. A blackwall performance radial gives a different presentation than redline or raised white letter options, and staggered cars need the front and rear tires selected as a coordinated pair rather than one axle at a time.
What sidewall styles are available for 2019 Mercedes-Benz S450 tires?
Sidewall styling for the 2019 Mercedes-Benz S450 includes blackwall, redline, and RWL options depending on tire size. Blackwall choices are concentrated in the BFGoodrich and Nitto performance radial lines, while Pro-Trac Street Pro III brings redline and raised white letter treatments to several S450 fitments.
The practical decision is visual as much as technical once the correct size is settled. Blackwall tires keep a modern, understated look, while redline and RWL add a more custom or muscle-inspired appearance, so the best match depends on whether the car is being kept subtle or given a more expressive presentation.
What brands offer tires for the 2019 Mercedes-Benz S450?
Tires for the 2019 Mercedes-Benz S450 are available from Pro-Trac, BFGoodrich, and Nitto. Depending on size, those choices include Street Pro III, g-Force Comp 2 AS, g-Force Phenom T/A, g-Force Sport Comp 2, and NT555 G2 series, with some sizes offering both appearance-oriented and performance-style options.
Brand choice is most useful after the fitment basics are settled. Comparing series, sidewall treatment, rim-width specification, and load figures within the correct size will tell you more than the brand name alone, especially on an S450 where front and rear fitment may need to be chosen as a matched staggered set.
Restoration & Appearance
Which tire should I choose for a period-style 2019 Mercedes-Benz S450?
A period-style approach on a 2019 Mercedes-Benz S450 starts with keeping the correct size and wheel format already on the car, then choosing the sidewall presentation that best suits the look you want. Pro-Trac Street Pro III options in redline or RWL create a more expressive appearance than the blackwall performance radials.
Because this is a modern luxury sedan, appearance choice usually matters more than strict restoration concerns. The cleanest result comes from matching the tire style to the car’s wheels and overall presentation while preserving the proper square or staggered sizing arrangement already required by the vehicle.
How does tire construction affect the appearance of a restored 2019 Mercedes-Benz S450?
Construction is simple on a 2019 Mercedes-Benz S450 because every primary fitment here is radial. The visible appearance difference comes less from bias-ply versus radial and more from sidewall treatment, with blackwall, redline, and raised white letter options giving the car distinctly different visual character.
For an owner concerned with presentation, the tire should complement the wheel design and the car’s intended style rather than overpower it. A subtle luxury look usually leans toward blackwall, while redline or RWL can push the S450 in a more custom direction without changing the required radial fitment format.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Mercedes-Benz S450?
Yes. Wheel changes, altered wheel widths, suspension lowering, and other modifications can affect tire fitment on a 2019 Mercedes-Benz S450 even when the tire size itself looks close to stock. That matters especially on staggered 19-inch and 20-inch setups, where front and rear clearances are already tied to different widths.
A modified S450 should be checked for wheel diameter, wheel width, and clearance at steering lock and suspension travel before a replacement tire is chosen. Even within the correct nominal size, a different wheel or altered ride height can change how much room is available around fenders and suspension components.
What should I inspect before driving a 2019 Mercedes-Benz S450 on new tires?
Before putting a 2019 Mercedes-Benz S450 back into regular road use on new tires, inspect the wheels for damage, confirm the correct front and rear sizes, and make sure inflation is even and stable. It is also wise to look over the suspension and alignment condition so the new tires are not asked to compensate for existing wear.
A short first drive should be used to check for rubbing, vibration, or any sign that the wrong size has been mounted on a staggered setup. Rechecking air pressure after initial use and watching for uneven wear patterns can help catch fitment or chassis issues before they become expensive tire problems.
What should I check before a longer drive in a 2019 Mercedes-Benz S450?
Before a longer drive, confirm that the 2019 Mercedes-Benz S450 has the correct size on each axle, consistent tire condition, and no visible cuts, bulges, or unusual wear. Pressure should be checked cold, and the car should be examined for any air loss or vibration that might signal a wheel, alignment, or tire issue.
Longer trips put more emphasis on small problems that may not show up around town. On a square setup that means confirming all four tires match, and on a staggered setup it means verifying the proper front-and-rear pairing so the car is not running mismatched sizes that compromise clearance or road manners.
