Police in the western city of Duisburg say the 17-year-old boy had been trying yesterday to get rid of the smell of cigarette smoke in a recently purchased secondhand Volkswagen SUV.
They say the teen sprayed so much air freshener inside the vehicle that it turned into a "combustible gas mixture." The gas ignited when he opened the passenger door and a light switched on.
Police said in a statement today that the force of the explosion blew out the vehicle's large glass sunroof.