26 MPG combined is a respectable figure for the 2019 Mercedes-Benz CLS450 4matic, considering what it’s designed for. This car isn’t about maximizing efficiency; it’s about delivering a smooth, technologically advanced, and stylish driving experience. The CLS customer prioritizes design and luxury over economy, accepting a reasonable compromise in fuel consumption to enjoy this unique combination. They appreciate the engineering and the prestige that comes with the Mercedes logo, understanding that ultimate frugality is not the main goal.

City and highway performance

The CLS450’s EPA ratings break down to 23 MPG in the city and 30 MPG on the highway. The city figure reflects the stop-and-go nature of urban driving, where the 3.0-liter inline-six engine and nine-speed automatic transmission work harder, especially with the added weight of the 4matic all-wheel-drive system. The highway MPG demonstrates the engine’s efficiency at sustained speeds. The nine-speed transmission allows for comfortable cruising at lower RPMs, which helps fuel economy on longer journeys. For those who frequently travel on highways, the CLS450 is surprisingly efficient, even with its sporting character. You can view CLS450 MPG across all years for more details.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Mercedes-Benz CLS450 4matic at $2,250. This figure is calculated based on driving 15,000 miles per year, using the national average fuel price at the time of calculation. Your actual fuel costs may vary depending on your driving habits, the type of fuel you use, and fuel prices. Driving aggressively and using premium fuel can certainly increase this number, while prioritizing fuel efficiency and using lower-priced fuel can reduce it.

Real-world expectations

While the EPA estimates provide a useful reference, real-world fuel economy often differs. Drivers who accelerate quickly or drive in congested city streets can expect to see numbers closer to the city rating, and maybe even lower. However, those who drive smoothly and consistently on the highway may get more than the EPA’s 30 MPG estimate. Factors such as tire pressure, vehicle maintenance, and the use of air conditioning can also affect fuel consumption. The best way to estimate real-world MPG is to track your own fuel consumption over time, allowing for a more accurate picture of what the CLS450 achieves in your specific driving conditions.

How it compares

The 2019 CLS450’s fuel economy is competitive but not the best in its class. If you’re looking for a similar vehicle with better mileage, the BMW 530e iPerformance plug-in hybrid offers a combined 29 MPG and an electric-only driving range. However, the BMW needs to be charged regularly to get the benefits of that higher number. If the CLS450 doesn’t quite meet your needs, view all Mercedes Benz fuel economy data for other options. The Audi A7, another stylish four-door coupe, achieves a similar 25 MPG combined with its 3.0-liter V6. Buyers often choosing between these three vehicles are likely prioritizing factors like design, brand prestige, and driving experience rather than fuel efficiency, and the CLS450’s unique luxury and performance explain its fuel consumption for its target customer.

Tips to maximize efficiency

Use the CLS450’s driving modes. Select “Eco” mode for relaxed cruising, which adjusts engine and transmission settings for maximum fuel efficiency. This mode will soften throttle response and encourage earlier upshifts, saving fuel.

Keep tires properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended levels, typically found on a sticker inside the driver’s side doorjamb.

Avoid aggressive driving habits. Rapid acceleration and hard braking use more fuel. Drive smoothly and gradually, and anticipate traffic to minimize unnecessary braking.

Reduce weight. Carrying extra weight in the vehicle reduces fuel economy. Remove any items from the trunk or cabin that are not essential.