German cars are popular in the United States, but U.S. cars are not as prevalent on German roads. One reason: tiny European streets and parking spots.

Tesla sold almost 60% fewer cars in Germany in January than in the year-earlier period, as the U.S. electric vehicle maker faces a test of popularity amid headline-grabbing political involvement by its billionaire CEO Elon Musk.

Tesla sales plunged in Germany last month, official data showed Wednesday, after billionaire owner Elon Musk waded into the country's election campaign by vocally backing the far right. Last month total electric car sales in Germany rebounded by over 53 percent from a year earlier,