Press release
191KB
description
5KB
january 26, 2018 - Mercedes-Benz
TecDay on new measurement procedures: Focus on WLTP and RDE: greater transparency for the customer
Until autumn 2018, #MercedesBenz will gradually switch its passenger car portfolio to WLTP (Worldwide Harmonized Light Vehicles Test Procedure). The WLTP provides test results closer to real driving than the NEDC (New European Driving Cycle), which has been in force since 1992. The new CLS is the first #MercedesBenz to be certified according to WLTP under the Euro 6d-TEMP emissions standard. This also required proof of compliance with the limits in the so-called RDE (Real Driving Emissions) road test.
“Customers will benefit from the WLTP, as it provides a more realistic yardstick for comparing the consumption and emissions of different vehicle models,” says Ola Källenius, Member of the Board of Management of Daimler AG with responsibility for Group Research & #MercedesBenz Cars Development.
The introduction of WLTP can be compared to a currency reform as far as the customer-relevant CO2 and consumption values are concerned: although the vehicles will not change technically, they will simply be measured by new standards. Källenius: “We have always had an eye not just on the test-cycle consumption, but also on our customer’s real on-road consumption.” For example, #MercedesBenz models across the range are, along with others, out in front in terms of aerodynamics. This makes itself felt in real-world driving, whereas it had only a minimal effect under the previous NEDC.
The new CLS is the first #MercedesBenz to be certified according to WLTP under the Euro 6d‑TEMP emissions standard. This also required proof of compliance with the limits in the so-called RDE (Real Driving Emissions) road test. WLTP certification requires around twice as much time and effort as certification under NEDC. The very extensive relevant regulation (over 700 pages) contains many different individual tests and entirely new procedures. The requirements for conducting the tests, and evaluating and documenting the results are significantly higher. The time and effort spent on each individual test has also risen sharply.
In contrast to the NEDC, the WLTP driving cycle takes ten minutes longer and has only 13 percent of standing time (NEDC: 23.7%). The total cycle length is around 23 kilometres – i.e. more than twice as long as the 11 kilometres of the NEDC. WLTP contains higher speeds up to 131 km/h (NEDC: 120 km/h). The average speed rises to 46 km/h (NEDC: 34 km/h), and it subjects the vehicles to greater speed variations.
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