Mercedes-Benz could see its ability to sell vehicles in the U.S. curtailed because of the company's ties to China.A bill currently before Congress seeks to prohibit sales and imports from companies in which a foreign country, in this case China, has an ownership stake of 15 percent or more. Total Chinese investment in Mercedes currently approaches 20 percent.Mercedes Group CEO Ola Källenius said in May that the company is "very confident that we will be able to handle that situation" if the legislation proceeds.