The 2012 Mercedes-Benz S350 belongs to the modern S-Class tradition of blending long-distance luxury with substantial road presence, and its tire fitment reflects that balance. Even with a comfort-focused mission, this is still a large executive sedan that depends on the right wheel-and-tire package to preserve its stance, ride quality, and overall character. The 2012 Mercedes-Benz S350 uses radial tire fitments in three sizes: 255/45R18, 255/40R19, and 255/35R20. Available choices include blackwall performance-oriented tires as well as RWL and redline treatments in select series. The key is matching the exact wheel diameter already on the car, then choosing the tire style that best suits appearance, use, and any previous wheel changes.
Which Tire Size Is Right for The 2012 Mercedes-Benz S350
The 2012 Mercedes-Benz S350 uses three primary tire sizes, all in radial construction, and the correct choice depends first on confirming which wheel diameter is on the car: 18, 19, or 20 inches. The S350 Bluetec 4Matic can be found with any of these fitments, so the real decision starts with the existing wheel setup and then moves to tire series, sidewall style, and road-use priorities.
A 255/35R20 tire is a metric radial size with a 255-millimeter nominal section width, a 35-series aspect ratio, radial construction, and fitment for a 20-inch wheel. On the 2012 Mercedes-Benz S350, this size represents the lowest-profile primary fitment of the three and keeps the vehicle in a clearly modern radial format. Available choices include BFGoodrich, Nitto, and Pro-Trac options, with blackwall, raised white letter, and redline sidewall treatments depending on the series. This size makes sense when the car is already equipped with 20-inch wheels and the goal is to stay with that wheel diameter while comparing appearance and tire-series differences carefully.
A 255/40R19 tire uses the same 255-millimeter nominal width but pairs it with a 40-series profile and a 19-inch wheel diameter in radial construction. For the 2012 Mercedes-Benz S350, it sits between the 18-inch and 20-inch fitments and preserves the same general width while matching a different wheel package. BFGoodrich and Pro-Trac products are available in this size, including blackwall, RWL, and redline presentations across several series. It is the right size to evaluate only when the car is already on 19-inch wheels, since the wheel diameter must match before comparing brand, load-related specs, or sidewall style.
A 255/45R18 tire is a metric radial with a 255-millimeter nominal section width, a 45-series profile, and fitment for an 18-inch rim. Within the 2012 Mercedes-Benz S350 range, this is the tallest-profile primary fitment among the three listed sizes while remaining the same basic width. Products in this size are available from BFGoodrich, Nitto, and Pro-Trac, with blackwall, RWL, and redline choices depending on the tire series. This size should be considered when the car has 18-inch wheels and the buyer wants to compare traditional blackwall performance tires against more appearance-driven sidewall treatments in the same basic fitment.
Sub-model fitment is simple here because the covered 2012 Mercedes-Benz S350 Bluetec 4Matic uses the same three primary tire sizes found at the model level. The important step is not choosing between trims, but confirming whether the car is currently running 18-inch, 19-inch, or 20-inch wheels.
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2012 Mercedes-Benz S350 Bluetec 4Matic
The 2012 Mercedes-Benz S350 Bluetec 4Matic can use 255/45R18, 255/40R19, or 255/35R20, all in radial construction. Tire selection therefore centers on matching the wheel diameter already on the vehicle, then comparing available series and sidewall treatments within that exact size.
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 2012 Mercedes-Benz S350 Tires for Sale
Available 2012 Mercedes-Benz S350 tire choices span 255/45R18, 255/40R19, and 255/35R20 fitments with BFGoodrich, Nitto, and Pro-Trac offerings. The product grid lets you compare blackwall, raised white letter, and redline styles along with different radial tire series and rim-width specifications.
Tire questions for the 2012 Mercedes-Benz S350 usually come down to confirming wheel diameter, understanding the three correct radial sizes, and comparing sidewall and brand choices within each fitment. These FAQs also cover maintenance, modifications, and what to inspect before road use.
Tire Size & Fitment
What tire size fits a 2012 Mercedes-Benz S350?
The 2012 Mercedes-Benz S350 uses three primary tire sizes: 255/45R18, 255/40R19, and 255/35R20. All three are radial fitments, and each one corresponds to a different wheel diameter rather than a random size substitution.
The practical step is to confirm which wheels are actually on the car before choosing a tire. Many buyers start with the model name alone, but this S350 can be equipped with 18-inch, 19-inch, or 20-inch wheels, so the mounted wheel diameter determines which of those three sizes belongs on the vehicle.
What size rim does a 2012 Mercedes-Benz S350 use?
A 2012 Mercedes-Benz S350 can use 18-inch, 19-inch, or 20-inch rims, depending on which tire size is on the car. Those correspond to 255/45R18, 255/40R19, and 255/35R20 respectively.
That makes wheel confirmation the first fitment check, especially on a vehicle that may have changed hands or received aftermarket wheels. Looking only at the overall tire width is not enough, because all three fitments use a 255-millimeter width while the wheel diameter changes and must match the tire exactly.
Why does the 2012 Mercedes-Benz S350 have more than one tire size?
The 2012 Mercedes-Benz S350 has more than one tire size because it can be found with different wheel diameters. The three primary sizes keep the same basic 255-millimeter width while pairing that width with 18-inch, 19-inch, or 20-inch wheels.
That means the choice is tied to the wheel package already on the car, not simply personal preference between the three numbers. A buyer should check the current wheels, the tire sidewall, and any prior modifications before selecting replacements, since the correct size follows the actual rim diameter in use.
Choosing the Right Tire
What should I consider when choosing a 255/45R18, 255/40R19, or 255/35R20 tire for a 2012 Mercedes-Benz S350?
Start by matching the exact size to the wheel diameter on the car, since the 2012 Mercedes-Benz S350 uses three different primary fitments. After that, compare radial tire series, sidewall style, rim-width compatibility, and any load figures that are relevant within that exact size.
The best choice depends on how the car is used and how you want it to present visually. Some owners will prefer a straightforward blackwall performance-oriented look, while others may want RWL or redline styling, so the final decision should balance fitment accuracy, appearance, and the current wheel setup.
What sidewall styles are available for 2012 Mercedes-Benz S350 tires?
Tires for the 2012 Mercedes-Benz S350 are available in blackwall, RWL, and redline sidewall treatments, depending on the size and series selected. Blackwall choices appear across BFGoodrich and Nitto products, while Pro-Trac Street Pro III adds RWL and redline options in these fitments.
That variety gives the S350 owner a noticeable appearance choice even when staying within the correct tire size. Sidewall style does not change the need to match the proper rim diameter, so appearance decisions should come after the basic fitment is confirmed and the tire series has been narrowed to the right size.
What brands offer tires for the 2012 Mercedes-Benz S350?
BFGoodrich, Nitto, and Pro-Trac all offer tires for the 2012 Mercedes-Benz S350 across its 18-inch, 19-inch, and 20-inch fitments. Depending on size, available series include g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, Nitto NT555 G2, and Pro-Trac Street Pro III.
Brand choice should be viewed as part of a larger comparison rather than the only decision. It helps to look at which brand offers the exact size you need, whether the sidewall style suits the car, and whether the tire's rim-width specification matches the wheels already installed on the S350.
Restoration & Appearance
Which tire should I choose for a period-style 2012 Mercedes-Benz S350?
A period-style 2012 Mercedes-Benz S350 usually starts with keeping the correct wheel diameter and matching one of its primary radial sizes: 255/45R18, 255/40R19, or 255/35R20. From there, the visual direction depends on whether you want a restrained modern blackwall look or something more stylized within the available product range.
Because this is a modern luxury sedan rather than an earlier restoration-era vehicle, appearance choices tend to revolve more around wheel-and-tire presentation than strict originality claims. Keeping the proper size for the installed wheels matters most, then the sidewall treatment and series can refine the car's overall look without straying from correct fitment.
How does tire construction affect the appearance of a restored 2012 Mercedes-Benz S350?
On the 2012 Mercedes-Benz S350, tire construction is straightforward because the primary fitments are all radial. The appearance difference comes less from bias-ply versus radial decisions and more from sidewall presentation, tire series, and whether the car sits on 18-inch, 19-inch, or 20-inch wheels.
That means visual planning should focus on keeping the wheel diameter and tire size aligned with the car's current setup. A blackwall tire gives the most understated presentation, while RWL and redline options create a more customized look, so the right choice depends on whether the goal is subtle luxury styling or a more personalized finish.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2012 Mercedes-Benz S350?
Yes, modifications can affect tire fitment on a 2012 Mercedes-Benz S350 even when the tire size looks close on paper. Aftermarket wheels, changes in wheel width, suspension alterations, or body and fender changes can all influence whether a 255/45R18, 255/40R19, or 255/35R20 setup remains appropriate.
That is why the current wheel-and-suspension setup matters as much as the model name. A buyer should verify the actual rim diameter, compare wheel width to the tire's approved range, and check steering and fender clearance before replacing tires, especially if the S350 no longer sits on its original-style wheel package.
What should I inspect before driving a 2012 Mercedes-Benz S350 on new tires?
Before driving a 2012 Mercedes-Benz S350 on new tires, inspect the wheels for the correct diameter and condition, confirm proper inflation, and make sure each tire matches the intended size for the car's current wheel package. It also helps to check for any signs of rubbing at the fenders or steering components.
A quick road-use inspection should also include suspension condition, air loss, and any vibration that might point to mounting or balance issues. Even a correctly sized tire can feel wrong on a car with worn components, so pairing fresh tires with a sound chassis gives the S350 the result the fitment is meant to deliver.
How often should tires on a 2012 Mercedes-Benz S350 be inspected?
Tires on a 2012 Mercedes-Benz S350 should be inspected regularly, not just when tread looks low. Frequent checks for pressure loss, uneven wear, cuts, bulges, and cracking are especially worthwhile on a luxury car that may see mixed use, seasonal storage, or long highway runs.
Inspection intervals become even more important when the car has multiple possible wheel-and-tire packages, because replacement history is not always obvious at a glance. Looking over the sidewalls and confirming the exact size during routine checks helps catch fitment mistakes early and gives you time to address wear or aging before a longer drive.
