Under the impression of the emissions issue with diesel vehicles, the Kraftfahrt-Bundesamt (KBA) was commissioned by the Federal Ministry for Digital and Transport (BMDV) to take organisational and technical preparatory measures in order to be able to implement and carry out the following measures:
Establishment of state test benches,
Random checks on the conformity of series-production vehicles,
Disclosure of engine software
Initial checks on external test benches in terms of field monitoring were already carried out in 2015. The results were presented in April 2016. Since then, they have been available to interested parties in the report of the Investigative Commission "Volkswagen".
With this background, KBA has been conducting its own exhaust emission tests on type-approved vehicles since 2016.
The exhaust gas tests are carried out in particular with KBA's own portable emission measurement systems" (PEMS) and, in addition, with stationary exhaust gas roller dyna-mometers. To supplement the real driving emissions (RDE) and roller dynamometer measurements and to check safety-relevant vehicle functions, a KBA-owned test track is set up on a runway of an airfield that is no longer in use in order to test the vehicles in the field in various driving situations.
Regulation (EU) 2017/2400 increases the testing requirements for the approval holders and thus also for the technical services and the Kraftfahrt-Bundesamt (KBA) through additional CO2 measurements. KBA or a designated technical service monitors the tests prescribed by the manufacturer at the manufacturer's premises. The requirements for approval holders and technical services are described in the information letter on Market Surveillance (ISM):
Product investigation does not stop at looking at the newly produced vehicles. With certain requirements, such as that of a minimum age and a minimum mileage, vehicles must also be tested in service. This conformity is called In-Service Conformity (ISC) and is an additionally defined product test and thus forms another requirement for the vehicles.
KBA publishes the results of the ISC tests in annual reports (only in German):