The high-voltage deactivation or establishment of voltage-free conditions in a high-voltage system is important when it comes to servicing, diagnosing, and repairing hybrid and electric vehicles. As high voltage poses a significant danger , the high-voltage system must be turned off prior to commencing work on or near the high-voltage system.In this step-by-step guide, you will learn how to deactivate the high-voltage system of a BMW 320e G21 in order to be able to carry out work on the high-voltage system. The manufacturer's specifications determine what work requires the high-voltage system to be deactivated. The deactivation of the high-voltage system of a BMW 320e G21 may only be carried out by a person with at least a minimum qualification level of 2S according to DGUV-I 209-093.