2017 Mercedes-Benz E400 Tires

The 2017 Mercedes-Benz E400 uses a staggered 18-inch tire setup rather than one size at all four corners. The front tire size is 235/40R18, and the rear tire size is 255/35R18. Both are radial tire fitments and both use 18-inch rims.

That means tire selection starts with identifying the wheel position, not just the vehicle year and model. A front tire should be matched to the front size and a rear tire to the rear size, especially on cars that retain the original-style staggered arrangement. It is also smart to confirm that the car has not been changed to a square setup or fitted with aftermarket wheels before ordering replacement tires.

The 2017 Mercedes-Benz E400 uses 18-inch rims with both of its primary tire sizes. The 235/40R18 front tire and the 255/35R18 rear tire are both built around an 18-inch wheel diameter, so the rim diameter stays consistent even though the front and rear tire widths differ.

Rim diameter is only one part of fitment, so it should not be the only measurement checked. Wheel width also matters, especially on a staggered car where the rear tire is wider than the front. Buyers replacing tires on an E400 should confirm the actual wheel specs on the car, because an 18-inch diameter alone does not guarantee that every 18-inch tire option is suitable for a modified or non-original wheel setup.

The 2017 Mercedes-Benz E400 has more than one tire size because it uses a staggered setup with different front and rear tires. The front position uses 235/40R18, while the rear uses 255/35R18. This is a position-based fitment pattern, not a case of multiple unrelated options for the same wheel location.

For a buyer, that means the first step is determining whether the tire being replaced is on the front axle or the rear axle. On a complete set replacement, both sizes need to be matched correctly. It is also worth checking whether a previous owner changed the wheels or tire layout, because some cars are altered from staggered to square setups and that changes the replacement decision significantly.

Start with correct position-specific sizing, since the 2017 Mercedes-Benz E400 uses 235/40R18 in front and 255/35R18 in the rear. After that, compare tires by construction, tire series, brand, and wheel-width compatibility. The available products are all radial blackwall tires, so the main differences are within the performance-oriented product lines rather than between bias-ply and radial construction.

A smart comparison also looks at how the car is actually used. A regularly driven coupe or convertible may call for a different product emphasis than a lower-mileage fair-weather car. Checking wheel width, matching the proper front and rear sizes, and deciding whether to keep one tire series at all four positions or pair equivalent front and rear series can make the final choice much clearer.

The available tire choices for the 2017 Mercedes-Benz E400 use a blackwall sidewall style in both 235/40R18 and 255/35R18. That keeps the appearance modern and understated, which suits the E400’s contemporary luxury coupe and convertible character. No alternate sidewall treatments appear in the current fitment range for these sizes.

Because sidewall style does not drive the decision here, buyers should put more attention on the tire series itself, along with the correct front or rear position. On this Mercedes-Benz, the real visual and functional differences are more about matching the proper staggered sizes and selecting a tire line that complements the car’s use, wheel specifications, and overall road-going expectations.

Tires for the 2017 Mercedes-Benz E400 are available from BFGoodrich and Nitto in the covered 18-inch sizes. Within those brands, the available series include BFGoodrich g-Force Comp 2 AS, g-Force Sport Comp 2, g-Force Phenom T/A, and the Nitto NT555 G2. All of these fitments are blackwall radial tires.

Brand choice should be treated as one part of a larger fitment decision rather than the whole decision by itself. It still matters to verify whether you are buying for the front or rear axle, compare the wheel-width range for the specific tire, and decide whether you want to stay within one tire series from front to rear. Those details usually matter more than the badge on the sidewall alone.

A period-style approach for a 2017 Mercedes-Benz E400 is less about vintage-looking construction and more about preserving the car’s original-era staggered radial presentation. That means keeping the 235/40R18 front and 255/35R18 rear sizing relationship intact and choosing a blackwall radial that suits the E400’s modern grand-touring character.

Since all of the available products are blackwall radials, the appearance decision comes down mainly to keeping the correct stance and wheel-to-tire balance rather than selecting between whitewalls, redlines, or other traditional sidewall treatments. Buyers who want the car to look right for its model year should avoid mixing incorrect front and rear sizes and should confirm the wheel setup before changing tire series.

Correct tire fitment matters on a 2017 Mercedes-Benz E400 because the car’s stance and overall presentation depend on the proper staggered sizing. Using 235/40R18 in front and 255/35R18 in the rear preserves the intended front-to-rear relationship far better than treating the car as though it uses one universal tire size.

Appearance refreshes can go off course quickly when wheel changes or incorrect tire substitutions alter how the car sits. Keeping the right wheel position matched to the right tire size helps maintain proportion and avoids a mismatched look. Anyone pursuing a highly exact restoration-style result should also compare the current wheel setup to vehicle-specific Mercedes-Benz reference material before making cosmetic decisions.

Yes, modifications can affect tire fitment on a 2017 Mercedes-Benz E400 even when the tire size looks close on paper. Aftermarket wheels, changes in wheel width, offset differences, suspension lowering, or body alterations can all change how a 235/40R18 front or 255/35R18 rear tire sits in the car’s wheel openings.

That is why a modified E400 should be measured from the actual car before replacement tires are chosen. Clearance at full steering lock, suspension travel, and inner wheelhouse space all matter. A tire that matches the correct nominal size still needs to be appropriate for the wheel and vehicle setup currently on the car, especially when the original staggered arrangement has been altered.

Before driving a 2017 Mercedes-Benz E400 on new tires, confirm that the front and rear sizes are installed in the correct positions and that the tires are mounted on suitable 18-inch wheels. It is also wise to check inflation, look for bead seating issues, and make sure there is no rubbing at the fenders, suspension, or steering components.

A short initial drive followed by a recheck is a sensible habit, especially on a staggered setup. Watch for vibration, pull, unusual noise, or signs that one axle received the wrong size. Tire condition should continue to be monitored over time as well, including tread wear, cuts, bulges, air loss, and any uneven wear pattern that could point to alignment or suspension concerns.

Tires on a 2017 Mercedes-Benz E400 should be inspected regularly rather than only when replacement is already overdue. A routine visual check for tread wear, cracking, punctures, cuts, bulges, and uneven wear is important on both the 235/40R18 front tires and the 255/35R18 rear tires, since staggered setups can wear differently from one axle to the other.

Inspection is especially important before longer drives and after any impact with potholes or road debris. Pressure should be checked consistently, and the car should be watched for changes in ride quality or steering response. On lower-mileage vehicles, age and storage conditions still matter, so tires that look usable at a glance should still be examined carefully for condition-related issues.