What emissions standards were the probed engines given?

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The probed Mitsubishi diesel engines received Germany's highest Euro 5 and Euro 6 emissions standards ratings.

The German investigation into Mitsubishi diesel vehicles centres on engines with 1.6- and 2.2-litre capacities. These specific engines had been awarded Germany’s top ratings for emissions compliance under both Euro 5 and Euro 6 standards. Prosecutors are examining the possibility that these engines were fitted with a "shutdown" or "defeat" device.
Examination of 1.6- and 2.2-litre diesel engines

The German authorities' probe specifically targets Mitsubishi diesel vehicles equipped with either 1.6-litre or 2.2-litre engines. These engines are at the heart of the investigation due to their high emissions ratings. The focus on these particular engine sizes stems from the belief that they may have been manipulated to appear cleaner than they are during real-world driving conditions.
Euro 5 and Euro 6 compliance ratings

The engines in question were granted Germany's highest possible ratings for emissions standards, specifically under the Euro 5 and Euro 6 regulations. These certifications represent the most stringent environmental requirements for vehicles operating within the European Union. The fact that these engines achieved the top ratings is a key aspect of the prosecutors' investigation into potential emissions cheating.
Suspected use of defeat devices

Prosecutors suspect that the engines under scrutiny were equipped with a "shutdown" or "defeat" device. Such devices are designed to reduce emissions only when the vehicle is undergoing testing procedures. In normal driving, however, these devices may allow the engines to emit higher levels of pollutants than legally permitted, thereby circumventing the intended environmental protections of the Euro 5 and Euro 6 standards.

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What emissions standards were the probed engines given?

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