BlueEFFICIENCY from Mercedes-Benz stands for pioneering efficiency technologies as well as innovative packages of measures based on optimising fuel consumption and emission levels.
BlueEFFICIENCY measures are comprehensive vehicle optimisations that help save fuel and ease the burden on the environment.
The CLA models also benefit from deployment of the most efficient engines with carefully designed aerodynamic and energy management measures, to keep fuel consumption to a minimum. In addition to intelligent energy management they also have tyres optimised for rolling resistance.
The outstanding Cd value of 0.23 (CLA 180) for the new CLA sets new benchmarks for aerodynamics in series production vehicles and makes itself felt - for positive reasons - through reduced fuel consumption. At a speed of just 60 km/h the wind resistance can be sufficiently high to have a significant effect on consumption. The CLA 180 BlueEFFICIENCY Edition  achieves the lowest Cd value of all for series production vehicles, with a Cd value of 0.22.
The low lift coefficient at the front and rear axle ensure agile handling, good driving stability at higher speed ranges as well as a secure, stable ride, even in sidewind. The outstanding aerodynamics also make themselves felt inside the vehicle where wind noise is reduced to a level unmatched in this category. All of which goes to show once again that, rather than being an end in themselves, good aerodynamic characteristics have lasting benefits in many different areas.
Significant savings can also come from a series of small contributions. With the aim of making the new CLA-Class more fuel efficient, the Mercedes-Benz engineers examined all the main components with regard to their energy usage and found ways of getting them to work more economically.
Overview of efficient energy management measures:
The ECO start/stop function reduces fuel consumption and emissions by switching off the engine automatically when the car comes to a stop (e.g. in traffic jams or at traffic lights). If a vehicle is equipped with the ECO start/stop function, a starter/generator is installed in place of the starter. Intelligent control electronics allow the starter/generator to supply the electrical energy for the vehicle’s electrical system and, in starter mode, the torque required to start the engine.
The combination of an aerodynamic shape, low-consumption and low-emission engines and demand-actuated ancillary components make the CLA economical and environmentally friendly. The CLA 180 BlueEFFICIENCY Edition, in addition to its top aerodynamics Cd rating of 0.22, has further measures deployed to reduce consumption, which at the same time reduce CO2 emissions to on average below 119 grammes per kilometre.
The consumption-reducing measures at a glance:
Great importance was attached to using materials in the new CLA that are low on emissions and recyclable, right from the early development stages. The new CLA achieves a materials recycling level of 85 percent and recoverability of 95 percent according to the ISO 22628 calculation model.
Examples of environmentally materials and processes include:
Mercedes-Benz feels responsible for the protection of natural resources and for providing sustainable and at the same time efficient technologies. After all, the goal is to ensure future mobility.
Mercedes-Benz is the only automotive brand in the world to have received an ISO-standard Environmental Certificate. For this certification, the vehicle models have to meet strict requirements and undergo stringent controls in their development, production and recycling. Our goal is to make environmental protection objectively measurable and to make it possible for you as the driver to experience it concretely.
(CLA 180 BlueEFFICIENCY Edition: Fuel consumption combined: 5.0 l/100 km, CO2 emissions combined: 117 g/km)
 The figures shown for fuel consumption and CO2 emissions were obtained in accordance with the prescribed measuring process (Regulation [EC] 715/2007 in its currently applicable version). The figures are not based on an individual vehicle and do not constitute part of the product offer; they are provided solely for purposes of comparison between different vehicle models