The most important new features.
WLTP - the new consumption and emissions test method.
From 1 September 2017, the WLTP represents a newly introduced consumption and emissions test method intended to provide test results that are closer to real vehicle operation than previously used NEDC tests. As a rule, measured values will be higher as a result of the new cycle.
The WLTP provides more accurate values.
Customers benefit from the WLTP because they receive a more realistic, comparative benchmark for consumption and emission figures of different vehicle models.
As the WLTP takes into account individual vehicle equipment, the values are more accurate than NEDC values. So to speak, they are vehicle-specific. As a result, the WLTP consumption values will be higher in most cases, but they will also be more realistic. Nothing will change in terms of the previous, everyday consumption values. The values will still be suitable for comparison across manufacturers and models. Mercedes-Benz is in favour of this new laboratory test (WLTP) as well as measurements on the road (RDE).
Dynamic driving profile.
The WLTP illustrates a more ample and dynamic driving profile with consumption and emission values that are closer to real driving conditions than the previously known values established as per NEDC. Vehicles' real consumption does not change. However, as a result of the stricter test cycle the majority of measured consumption values are higher.
Nowadays NEDC is considered outdated even though it also guarantees that values are comparable across manufacturers. Differences between laboratory and on-road measurements remain as a result of the measurement principle. However, the WLTP takes into account far more factors that influence consumption.
One reason for the increase is also that in future optional extras are taken into account in the CO2 values of vehicles. The difference in increase of the numeric CO2 values between NEDC and WLTP may differ in individual vehicles depending on technology and equipment.