For the new BlueEFFICIENCY models, Mercedes engineers have harnessed potentials from all fields of development to reduce weight, aerodynamic drag and rolling resistance yet further, and to organise the onboard energy management of these saloons even more efficiently. Together, these measures add up to a fuel saving on the NEDC driving cycle of 0.9 litres per 100 kilometres for the C 180 KOMPRESSOR, and 0.6 litres for the C 200 CDI.
The specialists in Sindelfingen have made very detailed improvements to the comprehensive lightweight construction concept of the C-Class, and have managed to shave off between 19 and 32 kilograms of weight depending on the model. This achievement is in part due to a newly developed windscreen made of laminated glass, which weighs around 1.2 kilograms less than before. This is made possible by a technology transfer from the Maybach luxury saloon: between the panes of glass lies a new, acoustically effective plastic membrane which efficiently absorbs wind noise. This has enabled Mercedes engineers to reduce the thickness of the windscreen, achieving a further weight reduction without compromising noise comfort in any way.
The noise-insulating lining of the firewall has also been weight-optimised with the help of special materials and the latest calculation methods. Using computer simulations, Mercedes-Benz recalculated the required firewall insulation and precisely redefined the material thickness of the sound-absorbing resinous foam in line with the noise input. This needs-driven redesign reduces the weight of the lining by around 20 per cent.
Forged lightweight wheels also have a positive effect on the weight. These tip the scales at around 1.8 kilograms less than conventional light-alloy wheels, saving a total of more than seven kilograms per vehicle. These new lightweight wheels (6 J x 16 ET 39), which have aerodynamic benefits too, are standard equipment for the new BlueEFFICIENCY variants of the C 180 KOMPRESSOR and C 200 CDI.
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