The 2009 Mercedes-Benz E550 sits in the later years of the W211 E-Class, blending V8 luxury-sedan character with the composed road manners buyers expect from a modern Mercedes. Tire selection on this car is tied closely to configuration, because the E550 uses 18-inch radial fitments that can differ between 4Matic and the staggered Base setup. The front size is 245/40R18, while the Base rear uses 265/35R18, and available choices range from blackwall performance radials to Pro-Trac redline and raised white letter options in the front size. The right decision comes down to confirming position, preserving the intended stance, and matching the tire's look and purpose to the way the car is driven.
Which Tire Size Is Right for The 2009 Mercedes-Benz E550
The 2009 Mercedes-Benz E550 uses two primary tire sizes, both on 18-inch rims, and the correct choice depends on the exact configuration. The 4Matic uses 245/40R18, while the Base model uses a staggered setup with 245/40R18 in front and 265/35R18 in the rear. Before choosing a tire, confirm whether the car is 4Matic or Base and, on Base cars, verify whether you are replacing the front or rear pair.
245/40R18 is a metric radial size in which 245 denotes section width in millimeters, 40 is the aspect ratio, R identifies radial construction, and 18 is the rim diameter in inches. On the 2009 Mercedes-Benz E550, this size serves either as the all-around fitment for the 4Matic or the front fitment on the staggered Base setup. Available choices include blackwall performance tires from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac, with Street Pro III options also offered in redline and raised white letter form. This is the size to evaluate when maintaining stock front-to-rear sizing relationships or replacing all four tires on a 4Matic.
265/35R18 is a metric radial size where 265 indicates section width in millimeters, 35 is the aspect ratio, R marks radial construction, and 18 identifies the wheel diameter. On the 2009 Mercedes-Benz E550, this size is used at the rear on the Base staggered configuration, giving it a specific role rather than universal application across every E550. Product choices here center on blackwall radials from BFGoodrich and Nitto across several g-Force and NT555 G2 series offerings. This is the size to confirm when replacing rear tires on a Base car and preserving the intended staggered fitment.
Sub-model fitment matters on the 2009 Mercedes-Benz E550 because tire sizing changes with drivetrain and axle position. The 4Matic uses one radial size all around, while the Base configuration splits front and rear sizes, so identifying the exact setup comes first.
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2009 Mercedes-Benz E550 4Matic
The 2009 Mercedes-Benz E550 4Matic uses a single radial tire size across the vehicle, making replacement more straightforward than the staggered Base setup. Tire selection here is mainly about choosing the right 18-inch product style, brand, and intended use while keeping all four tires matched appropriately.
The 2009 Mercedes-Benz E550 Base Front uses the smaller of the two primary E550 tire sizes, paired with the larger rear fitment on staggered cars. Front tire selection should maintain the correct axle position, especially if preserving the handling balance and visual proportion of the staggered setup matters.
The 2009 Mercedes-Benz E550 Base Rear uses the wider rear radial size that distinguishes the staggered Base configuration from the 4Matic. Rear replacement means confirming that the car still carries its original wheel arrangement and choosing a tire that matches the intended rear position rather than treating it as an all-around 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 2009 Mercedes-Benz E550 Tires for Sale
Available 18-inch E550 tires include radial choices from BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. Buyers can compare blackwall performance-oriented series across both sizes, with redline and raised white letter styling also available in the 245/40R18 front or 4Matic fitment.
These FAQs focus on the exact tire sizes used on the 2009 Mercedes-Benz E550, how the Base and 4Matic setups differ, and what to review when choosing tires for fitment, appearance, and road use.
Tire Size & Fitment
What tire size fits a 2009 Mercedes-Benz E550?
The 2009 Mercedes-Benz E550 uses two primary radial tire sizes: 245/40R18 and 265/35R18. The 4Matic uses 245/40R18, while the Base model uses a staggered arrangement with 245/40R18 in front and 265/35R18 in the rear.
That means the right size depends on more than just the model name. The first step is confirming whether the car is a 4Matic or a Base car, and on Base models, whether the tire being replaced is on the front or rear axle. Cars with aftermarket wheels or previous tire changes should also have their actual wheel setup checked before ordering replacements.
What size rim does a 2009 Mercedes-Benz E550 use?
The primary tire fitments for the 2009 Mercedes-Benz E550 use an 18-inch rim diameter. Both 245/40R18 and 265/35R18 are built for 18-inch wheels, so rim diameter stays consistent even though the tire widths and profiles differ.
Rim diameter alone does not settle the whole fitment question, especially on staggered Base cars. Wheel width and axle position still matter, and a rear 265/35R18 should not be treated the same as a front 245/40R18 just because both mount on 18-inch rims. Checking the existing wheel and tire combination on the car prevents front-to-rear mix-ups.
Do all 2009 Mercedes-Benz E550 sub-models use the same tire size?
No. The 2009 Mercedes-Benz E550 4Matic uses 245/40R18, while the Base model uses 245/40R18 in front and 265/35R18 in the rear. The model line shares the same 18-inch wheel diameter, but not the same tire setup across every configuration.
This matters most when replacing only two tires or when buying a full set for a car that may have been altered over time. A Base car with its original staggered layout needs front and rear sizes kept in their proper positions, while a 4Matic owner should confirm the car still carries the same size on all four corners before matching replacements.
Choosing the Right Tire
What should I consider when choosing a 2009 Mercedes-Benz E550 tire?
Start with the exact fitment: 245/40R18 for the 4Matic and front of the Base model, or 265/35R18 for the rear of the Base model. From there, the choice becomes one of brand, tire series, sidewall style, and intended use, since all primary options here are radial tires on 18-inch rims.
A buyer focused on everyday road use may compare tread type and product character differently than someone looking for a more distinctive appearance or specialty use. It also helps to confirm wheel width, especially when comparing products with stated rim-width ranges, and to make sure the car still wears its original wheel arrangement if it has changed hands.
What sidewall styles are available for 2009 Mercedes-Benz E550 tires?
Blackwall is the most common sidewall style available for the 2009 Mercedes-Benz E550 in both primary tire sizes. In 245/40R18, there are also Pro-Trac Street Pro III options with redline and RWL sidewalls, giving the front or 4Matic fitment a more custom visual presentation.
Sidewall choice affects the look of the car more than the basic fitment dimensions. A blackwall keeps the appearance modern and understated, while redline or raised white letter options add a more assertive styling cue. Since those alternate sidewalls appear in the 245/40R18 size, owners of staggered Base cars should confirm how they want the front and rear presentation to work together.
What brands offer tires for the 2009 Mercedes-Benz E550?
Tire options for the 2009 Mercedes-Benz E550 include BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac. BFGoodrich and Nitto appear across both primary sizes, while M&H Racemaster and Pro-Trac are available in the 245/40R18 fitment.
Brand choice should be considered alongside the actual tire series and the role each size plays on the car. Some products lean toward general performance street use, while others are more specialized or more appearance-driven because of sidewall treatment. Matching the tire to the car's configuration and the way it is driven is more useful than choosing by brand name alone.
Restoration & Appearance
Which tire should I choose for a period-style 2009 Mercedes-Benz E550?
A period-style 2009 Mercedes-Benz E550 usually starts with keeping the original size relationship intact: 245/40R18 all around on a 4Matic, or 245/40R18 front and 265/35R18 rear on a Base car. Since the E550 is a modern luxury-performance sedan, blackwall radials are the most natural visual fit among the available products.
Appearance goals still vary from subtle to more expressive. A buyer who wants a cleaner factory-inspired look may stay with blackwalls, while someone building a more personalized car may consider alternate sidewall treatments in the 245/40R18 size. The key is preserving the correct axle sizing and overall stance before deciding how much visual emphasis the tire should add.
How does tire construction affect the appearance of a restored 2009 Mercedes-Benz E550?
On the 2009 Mercedes-Benz E550, the primary fitments are radial tires, so construction does not create a bias-ply-versus-radial appearance decision like it would on an older collector car. The visible differences here come more from sidewall treatment, tire series character, and whether the car keeps its proper staggered or non-staggered setup.
That makes presentation a matter of proportion and detail rather than vintage construction style. Keeping the right front and rear sizes on a Base car preserves the intended visual balance, while a 4Matic benefits from a matched all-around look. Sidewall choices such as blackwall, redline, or raised white letter can then shape the final impression without changing the basic fitment format.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2009 Mercedes-Benz E550?
Yes. Wheel changes, suspension alterations, ride-height adjustments, or previous non-stock tire substitutions can all affect tire fitment on a 2009 Mercedes-Benz E550. Even though the primary sizes use 18-inch rims, changes in wheel width or offset can alter how a 245/40R18 or 265/35R18 sits within the fender and suspension space.
A modified car should be measured from the setup actually on the vehicle rather than assumed to follow original sizing. Clearance at full steering lock, inner suspension spacing, and rear fender room are all worth checking before replacement. That step is especially important on Base cars, where the staggered front-and-rear arrangement already gives each axle a different fitment requirement.
What should I inspect before driving a 2009 Mercedes-Benz E550 on new tires?
Before road use, inspect wheel condition, confirm the tire sizes match the car's actual configuration, and make sure each tire is properly inflated. It is also wise to check for uneven wear patterns, damaged wheels, valve stem condition, and any signs that the previous tires may have rubbed or worn irregularly.
A short drive should be followed by another look at pressure and visible clearance, especially if the E550 has aftermarket wheels or a recent suspension change. On a Base model, verify that the 245/40R18 front and 265/35R18 rear positions were not accidentally reversed. Catching those issues early helps prevent vibration, interference, or premature wear.
How often should tires on a 2009 Mercedes-Benz E550 be inspected?
Tires on a 2009 Mercedes-Benz E550 should be inspected regularly, not just when tread looks low. Routine checks should include air pressure, tread wear, cuts, bulges, punctures, and sidewall aging, with extra attention given to cars that are driven infrequently or stored for long periods.
Inspection matters even more on a staggered Base setup because front and rear tires are different sizes and may wear differently. Owners should also keep an eye on alignment-related wear, since a modern performance-luxury sedan can show shoulder wear or uneven patterns if suspension or alignment conditions are off. Frequent visual checks are a simple way to catch problems before they become expensive.
