The various elements of the safety system for the high-voltage system include the clear identification of high-voltage components (warning messages) and high-voltage cables (coloured orange). Housing, insulation materials and protective covers prevent access to active components. Connectors and covers are monitored to ensure that a high-voltage system can only be activated if all contacts are securely in place.

Cyclical monitoring of insulation levels (resistor monitoring) warns the customer if insulation limits are not being met and urges a visit to the service workshop. If pre-set insulation levels are not met, activation of the high-voltage system is prevented and the charging process stopped. Switching off the high-voltage system automatically leads to the active discharge of the full storage capacity. In the event of damage to the vehicle, the high-voltage system is automatically deactivated. Reactivation will depend upon the severity of the accident.