A Daimler is a make of large, expensive, comfortable car, especially a British one. People picture it as a car for wealthy, older people: mayors, company bosses, sometimes even royalty, often with a driver in front and the important person in the back. You use it as a noun, like a type name: they arrived in a Daimler. It feels old-fashioned and a bit grand; you meet it in British stories and news more than on the road in Taiwan. Though actually, when people here say Daimler they often mean the German company long tied to Mercedes-Benz. That is a different use. The learner-dictionary sense is the British luxury car, not “any Mercedes.” The name is a German family name used as a brand.