| 5.1.3.3. | A power-driven vehicle equipped according to paragraph 5.1.3.1.3. shall recognize that the coupling of a trailer equipped according to paragraph 5.1.3.1.1. is not compatible. When such vehicles are electrically connected via the electric control line of the towing vehicle, the driver shall be warned by the red optical warning signal specified in paragraph 5.2.1.29.1.1. and when the system is energized, the brakes on the towing vehicle shall be automatically applied. This brake application shall provide at least the prescribed parking braking performance required by paragraph 2.3.1. of Annex 4 to this Regulation. | a0c0 |