23 MPG combined. That’s the fuel economy for the 2019 Mercedes-Benz AMG CLS53 4matic Plus. This number will provoke a reaction from anyone considering this stylish, performance-oriented four-door coupe. Before dismissing it as thirsty, understand that the CLS53 buyer prioritizes a potent blend of luxury, cutting-edge technology, and invigorating driving dynamics. Fuel economy is a consideration, but rarely the deciding factor. They are buying a statement that says they value performance and panache, even if it means accepting fuel costs that are higher than the average sedan.

City and highway performance

The EPA estimates 21 MPG for city driving and 27 MPG on the highway. These figures provide a useful benchmark, but understanding their context is critical. City MPG will likely fluctuate dramatically based on driving style. Heavy traffic and frequent acceleration will inevitably push the economy lower. On the other hand, the 27 MPG highway figure is more readily attainable, especially on long, steady cruises. The CLS53’s 9-speed automatic transmission, perfectly matched to the 3.0L inline-6 engine with mild hybrid assist, helps maintain efficiency at higher speeds, allowing for relaxed and relatively economical touring.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Mercedes-Benz AMG CLS53 4matic Plus at $2,500. This figure is based on driving 15,000 miles per year, with a specified percentage of those miles driven in the city versus on the highway, using national average fuel prices for premium unleaded gasoline, which the CLS53 requires. Individual fuel costs will vary depending on driving habits, local fuel prices, and the actual number of miles driven annually. However, $2,500 per year provides a solid, standardized baseline for budgeting and comparison.

Real-world expectations

While the EPA provides estimates, real-world fuel economy often differs. The CLS53’s spirited performance encourages enthusiastic driving, which directly impacts fuel consumption. Drivers who frequently exploit the AMG-tuned engine’s power and acceleration should expect MPG figures to fall slightly short of the EPA estimates. Conversely, those who adopt a more conservative driving style, prioritizing smooth acceleration and consistent speeds, might see results closer to, or even slightly exceeding, the EPA numbers.

How it compares

Several competitors offer performance-oriented four-door coupes in the same class as the CLS53. The BMW M550i xDrive, for example, achieves around 17 MPG in the city and 25 MPG on the highway, making it noticeably less efficient. The Audi S7, with its V6 engine, posts figures in a similar range. The Porsche Panamera offers various trims with different powertrains; the Panamera 4S, a direct competitor, lands fairly close to the CLS53 at 21 MPG city and 28 MPG highway. These comparisons highlight that while the CLS53 is not the most fuel-efficient option in its segment, it holds its own against key rivals. Buyers considering a vehicle with this level of performance aren’t solely focused on fuel sippage. All luxury brands now offer a look at all Mercedes Benz fuel economy data. These alternative vehicles prove how vital it is to consider individual needs and performance requirements when gauging what represents a “good enough” MPG for the given buyer. Perhaps what they should really focus on is the AMG MPG across all years.

Tips to maximize efficiency

Use the CLS53’s drive mode selector. The “Comfort” or “Eco” modes prioritize fuel efficiency by adjusting throttle response, transmission shift points, and even climate control settings. These modes are ideal for everyday commuting and highway driving, where maximum performance isn’t required.

Pay attention to tire pressure. Underinflated tires increase rolling resistance, which reduces fuel economy. Regularly check and maintain the recommended tire pressure, as listed on the door jamb or in the owner’s manual. Properly inflated tires also improve handling and extend tire life.

Avoid aggressive acceleration and braking. These habits consume excess fuel. Instead, practice smooth, gradual acceleration and anticipate traffic flow to minimize unnecessary braking. The CLS53’s regenerative braking system helps capture energy during deceleration, further improving efficiency.

Minimize idling. Idling wastes fuel, especially in modern vehicles. If you anticipate a stop lasting longer than a minute or two, turn off the engine. Restarting the engine consumes very little fuel, and the CLS53’s engine start-stop system automatically shuts off the engine at complete stops to conserve fuel.

Reduce unnecessary weight. Extra weight in the vehicle reduces fuel economy. Remove any unnecessary items from the trunk or passenger compartment. Every 100 pounds of excess weight can decrease fuel economy by a small but measurable amount.