Motor vehicle having a pressure relief device that can be thermally activated, and method for pressure relief

A motor vehicle with a pressure relief device which is activatable thermally for pressure relief of at least one pressure vessel, comprising:

• a vehicle body floor element arranged, at least in regions, between a passenger interior compartment or a trunk and the pressure vessel;
• a pressure relief trigger configured to bring about the pressure relief directly or indirectly, at least one surface of the pressure relief trigger being arranged at least partially in the passenger interior compartment or in the trunk, or being recessed into the vehicle body floor element;
• and
• a triggering medium stored in the pressure relief trigger, wherein
• the pressure relief trigger is configured to absorb thermal energy from the passenger interior compartment or from the trunk in order to trigger the pressure relief device, without the thermal energy which is absorbed for the triggering having previously been transmitted by way of the vehicle body floor element to the pressure relief trigger, and
• the pressure relief trigger is configured such that the triggering medium itself is transported for the transport of the thermal energy.