The vehicle should be checked by a retailer/authorized repairer if the coolant level drops below the minimum mark. The high voltage battery coolant level should only be topped up by a trained vehicle technician. Running the vehicle with a low coolant level, or no coolant, causes serious damage.
The high voltage battery coolant level should be checked at least weekly. The level should be checked more frequently in high mileage or arduous operating conditions.
Always check the coolant level when the system is cold.
Make sure that the coolant level remains between the MIN and MAX indicator marks on the side of the reservoir. Contact a retailer/authorized repairer as soon as possible if the coolant level drops below the MIN mark.