The 2014 Mercedes-Benz S550 belongs to a generation of S-Class sedans known for combining full-size luxury with modern chassis sophistication, and tire fitment plays a big role in preserving that balance. On this model, the tire decision centers on several radial sizes, including a standard 245/50R18 setup and staggered 19-inch or 20-inch front-and-rear combinations. That means the first step is confirming whether the car has the square 18-inch arrangement or a staggered package with different front and rear sizes. Available choices also vary by brand, tire series, and sidewall style, so selection should match the car's wheels, appearance goals, and intended road use.
Which Tire Size Is Right for The 2014 Mercedes-Benz S550
The 2014 Mercedes-Benz S550 uses five primary tire sizes, and the correct one depends on whether the car has the standard 18-inch setup or a staggered 19-inch or 20-inch front-and-rear arrangement. Because these sizes span three different rim diameters and include separate front and rear fitments, the first thing to confirm is the exact wheel package on the car before choosing a tire.
The 245/50R18 size uses modern metric sizing: 245 is the nominal section width in millimeters, 50 is the aspect ratio, R identifies radial construction, and 18 is the rim diameter in inches. On the 2014 Mercedes-Benz S550, this size serves the standard radial fitment used on the 18-inch wheel setup. Available choices in this size include Pro-Trac Street Pro III tires with either RWL or Redline sidewall styling. It is the size to evaluate when the car uses the non-staggered 18-inch arrangement and a traditional front-to-rear match is required.
The 245/40R20 designation indicates a 245-millimeter-wide radial tire with a 40-series profile built for a 20-inch rim. On the 2014 Mercedes-Benz S550, this is a front fitment used with a staggered 20-inch wheel package rather than a universal all-around size. Product choices include blackwall performance-oriented options from BFGoodrich and Nitto, along with Pro-Trac Street Pro III tires in RWL and Redline versions. This size should be chosen only after confirming the car has the correct 20-inch front wheels and matching rear fitment.
The 245/45R19 size is a modern radial format with a 245-millimeter section width, a 45-series profile, and a 19-inch rim diameter. For the 2014 Mercedes-Benz S550, it functions as a front tire size on the staggered 19-inch setup, paired with a different rear tire. In this size, the available choices center on blackwall radial tires from BFGoodrich and Nitto across series such as g-Force Comp 2 AS, g-Force Phenom T/A, and NT555 G2. It is the right direction when the S550 has 19-inch front wheels and requires the proper staggered balance.
The 275/35R20 code identifies a wider modern radial tire, with 275 millimeters of nominal section width, a 35-series profile, and a 20-inch rim diameter. On the 2014 Mercedes-Benz S550, this is the rear size for the staggered 20-inch package, so it works as part of a matched front-and-rear setup rather than a standalone choice. Available options include blackwall tires from BFGoodrich and Nitto, plus Pro-Trac Street Pro III versions with RWL and Redline sidewalls. This size matters most when maintaining the proper rear fitment on an S550 equipped with 20-inch staggered wheels.
The 275/40R19 designation describes a 275-millimeter-wide radial tire with a 40-series profile for a 19-inch rim. On the 2014 Mercedes-Benz S550, it serves as the rear tire size in the staggered 19-inch arrangement and should be paired with the corresponding 19-inch front size. Choices in this size focus on blackwall radial tires from BFGoodrich and Nitto, including multiple g-Force series and the NT555 G2. It is the size to review when preserving the intended front-to-rear stagger on an S550 running 19-inch wheels.
Sub-model fitment on the 2014 Mercedes-Benz S550 is split between standard all-around sizing and staggered front-and-rear wheel packages. Checking whether the car is Base or 4Matic, and whether the wheels are front or rear positions on a staggered setup, is essential before selecting tires.
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2014 Mercedes-Benz S550 4Matic
The 2014 Mercedes-Benz S550 4Matic uses the standard 245/50R18 radial size when equipped with the non-staggered setup. That keeps tire selection relatively straightforward, with the main decision focused on sidewall presentation and staying matched to the existing 18-inch wheels.
The 2014 Mercedes-Benz S550 4Matic Front uses either a 245/40R20 or 245/45R19 radial tire, depending on the wheel package installed. That makes front wheel diameter the key detail to confirm before choosing among available blackwall, RWL, or Redline options.
The 2014 Mercedes-Benz S550 4Matic Rear uses either 275/35R20 or 275/40R19, again depending on the staggered wheel package. Rear tire selection should stay coordinated with the front size and wheel diameter so the car keeps the intended staggered fitment.
The 2014 Mercedes-Benz S550 Base uses the same 245/50R18 radial size as the standard non-staggered setup. That gives the owner a simpler replacement path, with the main choice centered on sidewall style rather than multiple front-and-rear sizes.
The 2014 Mercedes-Benz S550 Base Front uses 245/40R20 or 245/45R19 when the car has a staggered wheel arrangement. Tire choice starts with confirming whether the front wheels are 19-inch or 20-inch, then comparing the available tire series and sidewall treatments in that exact size.
The 2014 Mercedes-Benz S550 Base Rear uses 275/35R20 or 275/40R19 on staggered setups. Matching the rear tire to the correct wheel diameter and corresponding front size is the key step before narrowing the choice to brand and tire series.
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 2014 Mercedes-Benz S550 Tires for Sale
Available 2014 Mercedes-Benz S550 tire choices vary by wheel package, brand, tire series, and sidewall presentation. BFGoodrich, Nitto, and Pro-Trac options include blackwall, RWL, and Redline styles across Street Pro III and several g-Force and NT555 G2 radial lines.
Owners of a 2014 Mercedes-Benz S550 usually need to confirm the exact tire size, wheel diameter, and whether the car uses a staggered setup. These FAQs cover fitment, tire selection, sidewall choices, and the checks worth making before regular road use.
Tire Size & Fitment
What tire size fits a 2014 Mercedes-Benz S550?
The 2014 Mercedes-Benz S550 uses several radial tire sizes depending on wheel package and position. The standard fitment is 245/50R18, while staggered setups use 245/45R19 front with 275/40R19 rear or 245/40R20 front with 275/35R20 rear.
The key is not choosing from those sizes by preference, but identifying which wheels are actually on the car. A square 18-inch setup uses the same tire at all four corners, while the 19-inch and 20-inch packages use different front and rear sizes that need to stay properly matched.
What size rim does a 2014 Mercedes-Benz S550 use?
The 2014 Mercedes-Benz S550 uses 18-inch, 19-inch, and 20-inch rim diameters, depending on the setup. The 245/50R18 tire fits an 18-inch wheel, the 245/45R19 and 275/40R19 sizes fit 19-inch wheels, and the 245/40R20 and 275/35R20 sizes fit 20-inch wheels.
Wheel diameter should be confirmed before anything else, especially on a car that may have had wheels changed over time. On staggered setups, front and rear wheels also use different tire sizes, so checking both wheel position and rim diameter helps prevent ordering the right size for the wrong axle.
Why does the 2014 Mercedes-Benz S550 have more than one tire size?
More than one tire size applies because the 2014 Mercedes-Benz S550 was fitted with different wheel packages. Some cars use a standard 245/50R18 arrangement at all four corners, while others use staggered 19-inch or 20-inch combinations with narrower front tires and wider rear tires.
That means tire selection depends on the exact configuration already on the car rather than the model name alone. Looking at the sidewall size markings and confirming front-versus-rear wheel diameter is the most reliable way to determine which fitment path applies before replacing one tire or a full set.
Choosing the Right Tire
What should I consider when choosing a 2014 Mercedes-Benz S550 tire?
Start with the exact size already required by the car's wheel package, since the 2014 Mercedes-Benz S550 can use a square 18-inch setup or staggered 19-inch or 20-inch sizes. After size is confirmed, compare construction, tire series, sidewall style, and any rim-width or load details tied to that specific tire.
A buyer replacing 245/50R18 tires may focus on appearance choices such as RWL or Redline, while staggered 19-inch and 20-inch fitments bring more blackwall performance-oriented options. Matching the tire to the car's wheels, intended use, and overall presentation usually matters more than choosing by brand name alone.
What sidewall styles are available for 2014 Mercedes-Benz S550 tires?
Sidewall choices for the 2014 Mercedes-Benz S550 include Blackwall, RWL, and Redline, depending on tire size. Blackwall options appear across the BFGoodrich and Nitto selections in the staggered 19-inch and 20-inch sizes, while Pro-Trac Street Pro III adds RWL and Redline treatments in several applicable sizes.
That gives the car owner a real appearance decision, especially if the goal is to move away from a plain black sidewall look. The right choice still needs to begin with correct size and wheel diameter, because sidewall style should refine the selection rather than override proper front and rear fitment.
What brands offer tires for the 2014 Mercedes-Benz S550?
Tires for the 2014 Mercedes-Benz S550 are available from BFGoodrich, Nitto, and Pro-Trac. Depending on size, the choices include g-Force series tires from BFGoodrich, NT555 G2 from Nitto, and Street Pro III options from Pro-Trac in both standard and appearance-focused sidewall treatments.
Brand selection makes the most sense after the exact fitment is pinned down, because not every size has the same mix of offerings. The 18-inch fitment is more limited and appearance-driven, while the 19-inch and 20-inch staggered sizes open up broader comparisons in series, blackwall styling, and product specifications.
Restoration & Appearance
Which tire should I choose for a period-style 2014 Mercedes-Benz S550?
A period-style approach on a 2014 Mercedes-Benz S550 starts with keeping the correct tire size and wheel package already associated with the car. From there, the most appearance-focused choices are the Pro-Trac Street Pro III options, especially where RWL or Redline sidewalls are available in the needed size.
That kind of selection is less about strict restoration practice and more about the visual character you want the car to carry. The cleaner, more understated route usually points toward blackwall tires, while RWL or Redline changes the presentation noticeably without changing the need to stay within the proper fitment.
How does tire construction affect the appearance of a restored 2014 Mercedes-Benz S550?
On the 2014 Mercedes-Benz S550, construction is straightforward because the primary fitments are radial tires across all applicable sizes. The more visible appearance difference comes from sidewall treatment and tire series, not from choosing between bias-ply and radial construction as on much older collector vehicles.
That makes visual selection more about whether the car should retain a contemporary luxury-sedan look or carry a more customized presentation. Blackwall tires keep the most restrained appearance, while RWL and Redline options create a stronger visual statement once the correct wheel diameter and tire size are confirmed.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2014 Mercedes-Benz S550?
Yes, modifications can change tire fitment on a 2014 Mercedes-Benz S550 even when the size looks close on paper. Aftermarket wheels, altered offsets, suspension changes, or lowering can all affect how a 245/50R18, 245/45R19, 275/40R19, 245/40R20, or 275/35R20 tire sits in the wheel opening.
A car with non-original wheels should have wheel diameter, width, and front-to-rear setup checked before replacement tires are chosen. Clearance at full steering lock and under suspension movement also matters, particularly on staggered arrangements where the front and rear tires serve different roles.
What should I inspect before driving a 2014 Mercedes-Benz S550 on new tires?
Before driving a 2014 Mercedes-Benz S550 on new tires, inspect wheel condition, confirm the correct size at each corner, and make sure inflation is set appropriately for the installed tires. It is also worth checking for uneven wear patterns, visible suspension issues, and any rubbing that could signal a wheel or fitment problem.
A staggered S550 deserves an extra look to confirm the front and rear tires were not accidentally swapped or mismatched by diameter. After a short initial drive, recheck pressure and look again for contact marks, especially if the car has 19-inch or 20-inch wheels or any prior wheel changes.
How often should tires on a 2014 Mercedes-Benz S550 be inspected?
Tires on a 2014 Mercedes-Benz S550 should be inspected regularly, especially on a car that sees mixed seasonal use or long parked periods. Routine checks should include pressure, tread condition, sidewall cracking, cuts, bulges, and any signs of uneven wear that could point to alignment or suspension concerns.
A quick visual check before longer drives is a good habit, and a closer inspection becomes more important when the car wears staggered 19-inch or 20-inch tires. Wider rear tires can hide wear issues until they become more serious, so checking all four corners individually helps catch problems early.
