19 MPG combined isn’t going to win any fuel efficiency awards, but it summarizes the 2015 Mercedes-Benz E63 AMG 4matic’s place in the performance sedan category. This isn’t a car bought by penny-pinchers or hypermilers. It’s for the driver who values explosive acceleration, all-weather grip, and a hand-built AMG engine, and is willing to pay more at the pump.

City and highway performance

The EPA estimates reflect the compromises of putting a potent 5.5L twin-turbo V8 into a mid-size sedan. 16 MPG in the city highlights the engine’s thirst during stop-and-go driving, burdened by the car’s weight and the constant need to overcome inertia. 23 MPG on the highway is more respectable and can be achieved when using the engine’s strong torque for effortless cruising. But even on the open road, the temptation to accelerate hard will quickly reduce any attempts at saving fuel. This is not a car that encourages restraint.

Annual fuel cost

The Environmental Protection Agency (EPA) estimates an annual fuel cost of $3,050 for the 2015 Mercedes-Benz E63 AMG 4matic. This figure is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using the national average fuel price. It’s a useful benchmark, but individual driving habits and fluctuating fuel costs will influence the true figure. Buyers of this AMG variant should consider this a minimum expectation, given the likelihood of driving with enthusiasm.

Real-world expectations

While the EPA provides a standardized measurement, real-world MPG for the E63 AMG varies a lot depending on driving style. Someone exclusively commuting in heavy city traffic will likely see numbers closer to the low end of the EPA’s estimate, or even lower. Owners who primarily use the car for longer highway journeys, with occasional bursts of acceleration, might achieve figures at or slightly above the EPA’s 23 MPG highway rating. However, continuous aggressive driving and frequent use of the car’s launch control will certainly lead to worse fuel economy than listed by the EPA.

How it compares

The 2015 E63 AMG’s fuel economy places it in a different class than its less performance-oriented siblings. The standard, non-AMG E-Class models, even with the V6 engines, generally achieve significantly better MPG. Within the high-performance sedan segment, the BMW M5 of the same year, which uses a similar twin-turbo V8 setup, posts virtually the same MPG numbers at 16 city and 22 highway. An Audi RS7, with its 4.0L twin-turbo V8, offers comparable performance and fuel economy, edging out the E63 in some tests. For owners already looking for a high-performance sedan, the MPG difference is usually a secondary factor. These buyers are more concerned with horsepower, handling, and overall driving experience than saving on gas.

Tips to maximize efficiency

While the E63 AMG isn’t fuel-efficient, there are steps to minimize fuel consumption. Gentle acceleration is important. The twin-turbo V8 delivers strong torque at low RPMs, meaning you don’t need to floor the throttle to get up to speed. Smooth and deliberate inputs will noticeably improve MPG, especially in city driving.

Use the car’s driving modes. The “Comfort” or “Eco” mode, if equipped, will alter the engine mapping and transmission behavior to prioritize fuel efficiency over performance. While it won’t transform the E63 into a Prius, it can help achieve better figures during relaxed driving.

Ensure proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and increasing fuel consumption. Regularly check tire pressures and inflate them to the recommended levels listed on the driver’s side doorjamb.

Minimize idling. Modern engines are efficient at restarting, so avoid letting the car idle for extended periods. If you’re stopped for more than a minute, turn off the engine to conserve fuel. This is particularly relevant in urban environments with frequent traffic lights.

Keep up with scheduled maintenance. A well-maintained engine and drivetrain will operate more efficiently. Regular oil changes, air filter replacements, and spark plug inspections can all contribute to optimal fuel economy. Refer to your owner’s manual for the recommended maintenance schedule. To see how the 2015 E63 stacks up against all Mercedes Benz fuel economy data or to research the E63 MPG across all years can provide even greater context.