Maintenance tag for the marking of electric and hybrid vehicles that are currently being worked on in a workshop. The maintenance trailer is made of a rugged plastic film with perforation, Ø 5.5 mm. The HV specialist must enter his name and telephone number in the designated labelling field. The warning sign "Warning of dangerous electrical voltage", in accordance with EN ISO 7010/W012, with the addition "Attention High Voltage!" printed as an eye-catcher. In addition, it also contains the reference to switched-on high-voltage voltages.