30 MPG combined is a somewhat underwhelming figure for the 2016 Mercedes-Benz C350e, largely because it’s meant to be driven as a plug-in hybrid more than a conventional gasoline car. The C350e offers a taste of electric driving within the familiar luxury and comfort of the C-Class. Its buyers are not solely focused on fuel costs. They are often early adopters, technology enthusiasts, or those who value the prestige of a Mercedes-Benz badge alongside a plug-in powertrain.

City and highway performance

The EPA estimates of 28 MPG in the city and 32 MPG on the highway show the C350e’s slight edge on the open road. This difference is typical of hybrid vehicles.

In urban environments, the electric motor can contribute more significantly, especially during stop-and-go traffic where regenerative braking recaptures energy. However, on the highway, the gasoline engine takes on a larger role, and the benefits of electric assist are somewhat diminished at sustained high speeds. Drivers planning mostly highway commutes should be aware that they may struggle to consistently achieve the advertised 32 MPG.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2016 Mercedes-Benz C350e at $1,950. This figure is based on driving 15,000 miles per year, with a 55/45 split between city and highway driving, and using the national average fuel prices at the time of testing.

Keep in mind that this is an estimate. Your actual fuel costs will vary based on your driving habits, local fuel prices, and the extent to which you use the car’s electric driving capabilities. Those who diligently plug in and maximize electric range will likely see significantly lower annual fuel expenditures. You can find C350E MPG across all years here.

Real-world expectations

The C350e’s real-world fuel economy heavily depends on charging habits. If you rarely plug in, expect the car to behave like a conventional hybrid, potentially falling short of the advertised 30 MPG combined. On the other hand, frequent charging and using the car’s electric range (around 20 miles) for shorter trips can drastically improve your fuel efficiency, potentially exceeding the EPA estimates by a significant margin.

The C350e’s on-board computer provides detailed data on energy consumption, allowing drivers to monitor their fuel economy and driving habits. Expect the most economical performance in “Eco” mode, which prioritizes energy efficiency.

How it compares

The 2016 Mercedes-Benz C350e exists in a competitive segment of luxury plug-in hybrids. The BMW 330e achieves a similar combined rating of 34 MPG according to the EPA, which might sway buyers looking for a slightly more efficient German sedan. The Audi A3 e-tron, while smaller, boasts an EPA combined rating of 39 MPG and may appeal to those prioritizing fuel economy above all else.

However, the non-plug-in Lexus ES 300h hybrid achieves a combined 40 MPG, making it an option for buyers prioritizing fuel efficiency over the benefits of plug-in capability. Potential buyers should compare these figures carefully to determine which vehicle best aligns with their needs and driving patterns. Drivers interested in more Mercedes-Benz cars should look at all Mercedes Benz fuel economy data.

Tips to maximize efficiency

Prioritize charging whenever possible. The C350e’s electric range, while limited, can significantly reduce your gasoline consumption if used effectively. Even short trips can be accomplished purely on electric power, minimizing your reliance on the gasoline engine. Make sure to schedule charging at home, and use public charging stations when available.

Use the “Eco” driving mode. This mode optimizes throttle response, transmission shift points, and accessory usage to maximize fuel efficiency. While performance may be slightly reduced, the difference is often negligible in day-to-day driving. This mode also typically increases regenerative braking.

Practice smooth and consistent driving habits. Avoid hard acceleration and braking, as these actions consume more energy. Anticipate traffic flow and maintain a steady speed whenever possible. Use cruise control on the highway to help maintain a consistent pace and minimize fuel consumption.

Regularly monitor your tire pressure. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Check your tire pressure at least once a month and inflate them to the recommended levels, found on a sticker inside the driver’s side doorjamb.

Minimize excessive weight in the vehicle. Carrying unnecessary cargo in the trunk or backseat adds weight, which reduces fuel efficiency. Remove any items that you don’t need to carry on a regular basis, such as sports equipment or tools.