Mercedes Benz Convertible Top Kit #A2057780500 to repair/replace frayed or broken tension cords for 2016-2019 C-Class and E-Class Cabriolet convertible tops. A common issue with these cars per the Mercedes Benz technical bulletin #LI77.30-P-070145 Kit comes with complete instructions for replacing. DYI or a local upholstery shop can replace for approximately $1200.00