Regulation (EC) No 595/2009 establishes emission limits and common technical requirements for the type-approval of motor vehicles and replacement parts with regard to their emissions, laying down rules for in-service conformity, on-board diagnostic (OBD) systems and measurement of fuel consumption.

In order to raise the level of environmental performance of the vehicles, a particulate number limit for positive ignition engines should be introduced.

The legislation on type-approval of motor vehicles and engines with respect to emissions from heavy-duty vehicles (Euro VI) needs to be adapted to technical progress. Therefore, the requirements for type-approval and in-service conformity of engines and vehicles using dual-fuel technologies need to be provided for. Additional matters relating to the type-approval of engines using gaseous fuels should also be addressed.

In the case of heavy-duty vehicles with a technically permissible maximum laden mass not exceeding 7,5 tons, it is appropriate to allow that OBD systems fitted into those vehicles be partially developed in accordance with the OBD rules applicable to light-duty vehicles, without undermining their level of environmental performance.

Some additional requirements need to be laid down in order to ensure the equivalence between an EC type-approval and the type-approval provided for by UNECE Regulation No 49.

The oil temperature of the engine must be expressed in Kelvin. It is therefore necessary to amend Annex VIII to Directive 2007/46/EC.

Directive 2007/46/EC, Regulation (EC) No 595/2009 and Regulation (EU) No 582/2011 should therefore be amended accordingly.

In order to provide Member States and manufacturers with sufficient lead time for the adaptation of their respective information systems, it is appropriate to delay the application of the amendments related to the certificate of conformity.

The measures provided for in this Regulation are in accordance with the opinion of the Technical Committee — Motor Vehicles,