The EV was parked in a Korean parking garage for three days...

The EV was parked in a Korean parking garage for three days before it spontaneously burst into flames, and wasn't charging at the time.

When they do go up in flames, they can cause a lot more damage. This Mercedes-Benz EQE started showing white smoke and went ablaze seconds later in an underground parking lot in an apartment complex in the city of Incheon, which is about 20 miles west of Seoul, South Korea.

The EQE fire caused damage to some 140 cars (of which 70 had more significant damage) that were parked on the same floor, and 23 people who lived in the building above were hospitalized for smoke inhalation. According to Korea JoongAng Daily, a total of 103 people were initially evacuated from the nearby buildings after they started filling up with black smoke.

The fire was so strong that it affected the electricity grid not only in the building where it happened but for the entire building complex. Later reports said that almost 500 households were without power and water for five days after the incident.
Mercedes-Benz Korea made an initial statement, saying “We can't confirm details about the exact model and batteries at the moment” and “We are taking this very seriously and will do our best to collaborate with fire authorities to determine the exact cause.” The specific Mercedes EQE variant that caught fire has not yet been determined.

All that’s left of the EQE is a bare shell, so there’s not much to go on, but it is known that the vehicle had been parked for three days and wasn’t being charged at the time.