26 MPG combined for the 2026 Mercedes-Benz CLE450 4MATIC Convertible blends luxurious open-air motoring with sensible, albeit not class-leading, efficiency. This isn’t a stripped-down economy car; it’s a touring machine, designed for long-distance comfort and effortless performance, all wrapped in a beautifully executed convertible package. Buyers of the CLE450 prioritize the experience, the wind in their hair, the refined power delivery of the inline-six, and the prestige of the three-pointed star. A vehicle offering this level of engineering, comfort, and dynamic capability, especially with all-wheel drive, won’t sip fuel like a hybrid. Its fuel economy comes from modern powertrain advancements from Mercedes-Benz, maintaining a respectable balance between exhilarating performance and daily usability, without demanding excessive stops at the pump.

City and Highway Performance

Looking at the EPA figures, the CLE450 4MATIC Convertible achieves 23 MPG in the city and 32 MPG on the highway. That 23 MPG in urban environments holds genuine significance. This vehicle, while a grand tourer at heart, will spend considerable time navigating commutes, running errands, and cruising through cityscapes. For those who enjoy an open-top drive through urban centers, 23 MPG is a perfectly acceptable return. It means the 3.0L inline-six, paired with the smooth 9-speed automatic transmission, manages start-stop traffic and lower speeds with admirable restraint. The engine’s mild-hybrid assist plays a role here, subtly smoothing out power delivery and contributing to efficiency during coasting and deceleration.

The 32 MPG highway figure is where the CLE450 truly shines for its intended purpose. This is the realm of open-top road trips, long weekend getaways, and extended cruises where the smooth power delivery and comfortable ride can be fully appreciated. Maintaining 32 MPG at cruising speeds, even with the added aerodynamic drag inherent to a convertible and the weight of the 4MATIC system, is a strong showing. It ensures that those spontaneous cross-state drives don’t become excessively costly, allowing owners to fully indulge in the freedom and luxury that defines this vehicle. For a look at the range of models, including the CLE450, explore CLE450 MPG across all years.

Annual Fuel Cost

The EPA estimates an annual fuel cost of $2,250 for the 2026 Mercedes-Benz CLE450 4MATIC Convertible. This figure is calculated based on an average of 15,000 miles driven per year, assuming national average fuel prices, and factoring in the combined 26 MPG. For the typical CLE450 buyer, this cost falls within expectations. They are investing in a premium luxury convertible, and the running costs align with that segment. While not an insignificant amount, $2,250 per year for fuel represents a manageable expenditure for someone who has already made the decision to purchase a vehicle of this caliber. It ensures that the overall ownership experience remains one of indulgence, not financial constriction at the pump. This estimated cost provides a clear, transparent benchmark for planning and budgeting.

Real-World Expectations

In the real world, the CLE450 4MATIC Convertible’s 26 MPG combined will fluctuate based on driving style and conditions, though Mercedes-Benz powertrains are typically very adept at meeting or slightly exceeding their EPA claims. Enthusiastic driving with the top down, frequently engaging the inline-six’s full 375 horsepower, will naturally see figures dip. Conversely, long, steady highway cruises with a light foot will likely push the needle closer to, or even beyond, that 32 MPG highway mark. The 4MATIC all-wheel drive system, while delivering exceptional traction and stability, does carry a slight efficiency penalty compared to a rear-wheel-drive equivalent, but its benefits in inclement weather or spirited driving often outweigh this minor trade-off for the target demographic. Owners will find that gentle acceleration, anticipation of traffic, and consistent highway speeds are key to replicating those favorable EPA numbers.

How It Compares

When stacked against its direct competition, the CLE450 4MATIC Convertible’s 26 MPG combined proves competitive within the luxury convertible segment. Consider the BMW 440i xDrive Convertible, for instance, which often lands around 25 MPG combined (22 city/31 highway) with its similar 3.0L inline-six and all-wheel-drive setup. The Porsche 911 Carrera 4 Cabriolet, while offering significantly higher performance, typically manages around 20-22 MPG combined. Even a more mainstream but still luxurious option like the Audi A5 Cabriolet Quattro with its 2.0L turbo-four achieves around 27 MPG combined, but at the cost of two cylinders and considerably less power. This specific comparison highlights that Mercedes-Benz has engineered the CLE450 to deliver a potent and refined driving experience without making egregious sacrifices at the pump. Its fuel economy sits comfortably in the middle, appealing to buyers who want power, luxury, and convertible charm without feeling guilty about every fill-up. For a broader array of data points, consult all Mercedes Benz fuel economy data.

Tips to maximize efficiency

Maintain consistent, moderate speeds, especially on the highway. The CLE450’s 3.0L inline-six is highly efficient when cruising, so minimize abrupt acceleration and braking to let the engine and 9-speed transmission work optimally. Engage the ECO drive mode. This setting will often desensitize the throttle, facilitate earlier upshifts, and optimize the mild-hybrid system’s contribution, leading to noticeable fuel savings during your daily drive. Ensure tires are properly inflated. Correct tire pressure reduces rolling resistance, directly impacting your fuel economy and also improving handling and tire longevity, an often-overlooked factor. Lighten the load by removing unnecessary items from the trunk. While the CLE450 is not a heavy vehicle, every pound impacts efficiency, especially when combined with the inherent weight of a convertible and its support structures. Plan your routes to avoid heavy traffic and excessive idling. The city MPG of 23 is respectable, but preventing periods of stop-and-go congestion will always result in better real-world figures by minimizing fuel consumption at a standstill.