The 2012 Mercedes-Benz CL550 belongs to the final era of the large Mercedes coupe, blending grand touring comfort with the substantial presence expected from the CL-Class. It is a car that rewards the right tire choice because wheel and package differences change the fitment story more than they do on many older collector vehicles. This model uses radial tire fitments in 255/45R18, 255/40R19, or 255/35R20 depending on configuration. Available choices range from traditional blackwall performance radials to RWL and redline treatments in select sizes and series. The real key is matching the exact wheel package first, then choosing the tire character that best suits appearance, road use, and overall setup.
Which Tire Size Is Right for The 2012 Mercedes-Benz CL550
Three primary tire sizes apply to the 2012 Mercedes-Benz CL550, and the right choice depends on the exact sub-model and wheel diameter. The 4Matic uses an 18-inch fitment, while the 4Matic w/Sport Pkg. uses either a 19-inch or 20-inch fitment. Before comparing brands, sidewall styles, or tire series, confirm which wheel package is actually on the car.
A 255/45R18 size uses a 255-millimeter section width, a 45-series aspect ratio, radial construction, and an 18-inch rim diameter. On the 2012 Mercedes-Benz CL550, this is the radial fitment used on the 4Matic configuration and it keeps the tire in a modern metric format familiar to current replacement buyers. Available choices include BFGoodrich, Nitto, and Pro-Trac offerings, with blackwall, RWL, and redline sidewall treatments represented across several series. This size is the right place to focus when the car retains its 18-inch wheel setup and you want to compare tire character without changing fitment class.
A 255/35R20 size carries the same 255-millimeter nominal width but pairs it with a lower 35-series profile on a 20-inch rim. For the 2012 Mercedes-Benz CL550, this size belongs to the 4Matic w/Sport Pkg. fitment and reflects a larger-wheel, lower-profile radial setup. Product choices include BFGoodrich, Nitto, and Pro-Trac lines, with blackwall options joined by RWL and redline alternatives for buyers who want a more distinctive sidewall presentation. This fitment deserves a careful wheel check first, since the 20-inch rim diameter is the defining factor before any brand or series comparison begins.
A 255/40R19 tire uses a 255-millimeter width, a 40-series profile, radial construction, and a 19-inch wheel diameter. On the 2012 Mercedes-Benz CL550, this size also appears with the 4Matic w/Sport Pkg., making it part of the sport-package fitment story rather than a universal CL550 size. BFGoodrich and Pro-Trac options are available here, including blackwall, RWL, and redline styles across g-Force and Street Pro III series. This is the size to evaluate when the car is equipped with 19-inch wheels and the goal is to stay within the correct overall fitment category while comparing appearance and tire line.
Sub-model fitment matters on the 2012 Mercedes-Benz CL550 because tire size changes with the wheel package. The standard 4Matic uses one size, while the 4Matic w/Sport Pkg. moves to larger-diameter wheel fitments, so confirming the exact configuration is the first step.
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2012 Mercedes-Benz CL550 4Matic
The 2012 Mercedes-Benz CL550 4Matic uses the 255/45R18 radial fitment. That keeps the tire search centered on the 18-inch wheel setup, where the main decision becomes choosing among available brands, series, and sidewall treatments rather than sorting through multiple primary fitment sizes.
The 2012 Mercedes-Benz CL550 4Matic w/Sport Pkg. uses larger-wheel radial fitments, with both 255/40R19 and 255/35R20 associated with this sub-model. Tire selection starts with confirming which wheel diameter is actually on the car, then narrowing the choice by tire series, sidewall style, and intended road use.
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 CL550 Tires for Sale
Available CL550 tire choices center on 255/45R18, 255/40R19, and 255/35R20 radial fitments from BFGoodrich, Nitto, and Pro-Trac. The product grid is useful for comparing blackwall, RWL, and redline styles along with series such as g-Force, NT555 G2, Phenom T/A, and Street Pro III.
Common CL550 tire questions usually come down to the exact size for the wheel package, whether all sub-models share the same fitment, and how to compare available radial tire styles, brands, and maintenance considerations before road use.
Tire Size & Fitment
What tire size fits a 2012 Mercedes-Benz CL550?
The 2012 Mercedes-Benz CL550 uses three possible tire sizes: 255/45R18, 255/40R19, and 255/35R20. The correct size depends on the sub-model and wheel package, with the 4Matic using 255/45R18 and the 4Matic w/Sport Pkg. using 255/40R19 or 255/35R20.
That makes wheel and package verification more important than simply searching by model name. A quick check of the tire sidewall and actual wheel diameter will usually settle the question, especially on cars that may have had replacement wheels or appearance upgrades over time.
What size rim does a 2012 Mercedes-Benz CL550 use?
A 2012 Mercedes-Benz CL550 can use 18-inch, 19-inch, or 20-inch rims depending on configuration. The 255/45R18 fitment uses an 18-inch rim, the 255/40R19 fitment uses a 19-inch rim, and the 255/35R20 fitment uses a 20-inch rim.
Rim diameter is the first fitment point to confirm because each primary tire size is tied to a specific wheel diameter. Once that is established, the next checks are tire width compatibility, wheel width, and clearance around suspension and body components if the car has been altered from stock.
Do all 2012 Mercedes-Benz CL550 sub-models use the same tire size?
No. The 2012 Mercedes-Benz CL550 4Matic uses 255/45R18, while the 2012 Mercedes-Benz CL550 4Matic w/Sport Pkg. uses 255/40R19 or 255/35R20. Fitment is tied to the specific sub-model and wheel package rather than staying the same across every CL550 configuration.
That difference matters because it changes the rim diameter and the tire profile you need to shop for. Anyone replacing tires on a recently purchased CL550 should verify the actual wheel setup on the car before choosing a tire, especially if the vehicle may have seen wheel swaps during its life.
Choosing the Right Tire
What should I consider when choosing a 255/45R18 tire for a 2012 Mercedes-Benz CL550?
Start with the correct fitment and construction: the 255/45R18 size for the CL550 is a radial tire on an 18-inch wheel. From there, the main comparison points are brand, tire series, sidewall style, and wheel-width compatibility within the available product range.
BFGoodrich, Nitto, and Pro-Trac all appear in this size, with blackwall, RWL, and redline choices available. A buyer focused on a cleaner modern presentation may lean toward blackwall, while someone who wants a more distinctive visual treatment may compare the specialty sidewall offerings after confirming the wheel setup.
What sidewall styles are available for 2012 Mercedes-Benz CL550 tires?
Available sidewall styles for 2012 Mercedes-Benz CL550 tires include blackwall, RWL, and redline depending on the size and tire series. Blackwall appears across the mainstream performance-oriented radial choices, while RWL and redline are offered in select Pro-Trac Street Pro III fitments.
The right sidewall style depends more on the look you want than on basic fitment, as long as the tire remains in the correct size. Blackwall suits a restrained modern appearance, while RWL or redline can give the CL550 a more custom or enthusiast-oriented visual character without changing the primary size itself.
What brands offer tires for the 2012 Mercedes-Benz CL550?
BFGoodrich, Nitto, and Pro-Trac offer tires for the 2012 Mercedes-Benz CL550 across its 18-inch, 19-inch, and 20-inch fitments. Depending on size, the available series include g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, Nitto NT555 G2, and Pro-Trac Street Pro III.
That variety gives buyers different ways to compare tire character without changing the vehicle's basic fitment. The best approach is to narrow the search to the exact wheel diameter first, then compare sidewall style, rim-width range, and any load information shown for the specific size under consideration.
Restoration & Appearance
Which tire should I choose for a period-style 2012 Mercedes-Benz CL550?
A period-style 2012 Mercedes-Benz CL550 tire choice starts with keeping the correct wheel-diameter fitment for the exact sub-model, whether that is 255/45R18, 255/40R19, or 255/35R20. Since this is a modern luxury coupe, the visual decision usually comes down to selecting a radial tire that suits the car's intended presentation.
Blackwall options preserve a restrained contemporary look, while RWL or redline versions create a more customized appearance in the sizes where they are offered. Buyers pursuing a highly authentic presentation should compare the car's current wheels and appearance goals carefully before moving away from a conventional blackwall radial look.
How does tire construction affect the appearance of a restored 2012 Mercedes-Benz CL550?
On the 2012 Mercedes-Benz CL550, construction is straightforward because the primary fitments are radial across all listed sizes. That means the appearance difference comes less from bias-ply versus radial choice and more from wheel diameter, tire profile, and whether the sidewall is blackwall, RWL, or redline.
The visual effect of a 20-inch low-profile tire is naturally different from an 18-inch fitment, even when overall diameter remains close. Keeping the intended wheel package and selecting the sidewall treatment carefully will do more for the finished look than changing construction type on this particular model.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2012 Mercedes-Benz CL550?
Yes. Wheel changes, suspension alterations, lowering, and other modifications can affect tire fitment on a 2012 Mercedes-Benz CL550 even when the tire size appears close to one of the standard fitments. Changes in wheel diameter, width, or offset can alter clearance at the fenders, steering components, and suspension.
That is especially important on the sport-package configurations, where 19-inch and 20-inch fitments already use lower-profile tires. Any CL550 with aftermarket wheels should be checked carefully for actual wheel dimensions and available clearance before replacing tires by size name alone.
What should I inspect before driving a 2012 Mercedes-Benz CL550 on new tires?
Before road use, inspect tire pressure, wheel condition, valve stems, lug torque, and visible clearance around the suspension and fender openings. It is also wise to confirm that the tire size matches the wheel diameter on the car and that there are no signs of rubbing at full steering lock.
A CL550 that has sat for long periods deserves an extra look at brake condition, suspension wear, and any flat-spotting or age-related issues on the tires being removed. A short, careful test drive can help confirm smooth operation before returning the car to regular road use.
How often should tires on a 2012 Mercedes-Benz CL550 be inspected?
Tires on a 2012 Mercedes-Benz CL550 should be inspected regularly for air pressure, tread wear, cuts, bulges, and sidewall aging, especially if the car is driven infrequently. A quick visual check before use and a more thorough inspection at routine service intervals is a sensible approach for a grand touring coupe of this age.
Collector-minded or low-mileage cars often age their tires long before they wear them out. Storage conditions, long idle periods, and underinflation can all shorten service life, so periodic checks matter just as much as mileage when keeping the CL550 ready for dependable road use.
