Symbol 2552 from ISO 7000 - Title/Meaning: Medical assistance sign light 
Function/description: To identify the control that activates or deactivates a sign displaying a medical cross located on the roof of the vehicle. To indicate the operational status of the medical assistance light.
Own work using: iso.org/obp/graphics/grs/00aee96d-d35f-4932-b15c-a5113eb6bbd4 200.png
Vectorization:  Mrmw