Division 2.2.7.1

If the vehicle is fitted with an engine, it shall run at a speed not exceeding 50 % of the speed corresponding to its maximum power output. However, if this is proven not to be practicable due to specific engine control strategies, for instance in the case of electric hybrid vehicles, a realistic worst case scenario shall be determined. The scenario shall take into account the engine speeds, periodical absence or complete absence of a running engine during normal driving conditions at an ambient temperature of – 1 °C. If the system can meet the demisting requirements without a running engine, the engine does not have to run at all.