It is the objective of Volkswagen to provide customers with the WLTP figures, in addition to the NEDC figures already available, during the online configuration of their vehicle. Upon the signature of the vehicle purchase contract, consumption and CO2 values will then be stated by the manufacturer for the specific market. In the EU, the customer will also receive the Certificate of Conformity (COC) as a legal basis for the contract. As already mentioned, special equipment is taken into consideration in the WLTP tests. For example, a panoramic roof increases a vehicle's weight, a rear spoiler changes its aerodynamics and different tires affect the rolling resistance. As a result of these factors, the emissions may either be increased or reduced.
6. Why are weight, aerodynamics and rolling resistance taken into consideration?
The more a vehicle weighs, the higher are its fuel consumption and emissions. In the NEDC, measurements could be carried out without optional extras. This meant that vehicles were lighter, resulting in lower measurements. In the WLTP cycle, special equipment must be taken into consideration. This makes the vehicle heavier and the emissions values higher.
7. Will road tax rise as a result of the higher CO2 values?
Vehicle keepers will only have to pay higher road tax if the new test procedure leads to a higher CO2 figure than the old procedure. Currently, the CO2 share in road tax in Germany is about two euros per g/km.
8. What countries are introducing WLTP?
The test procedure is being introduced by the 28 member states of the European Union as well as other countries outside the EU. The USA participated in the development of the procedure but left the project during the process. India and South Korea will probably only implement parts of WLTP. Discussions as to whether and to what extent to introduce the new procedure are also in progress in Japan.
9. How does the test procedure work?
The test procedure is based on vehicle behavior data from all countries and regions participating in WLTP. A driving cycle with a duration of about 30 minutes was calculated on this basis.