Mercedes is to become the first German carmaker to start selling an automated driving system that can take complete control in gridlocked traffic on the motorway, the company announced on Friday. The installation of the system will cost €5,000 ($5,277) plus VAT for the Mercedes S-Class, while for the electric model EQS, the cost rises to €7,400 plus VAT due to the need to book a driving assistance package. Sales of the systems are due begin on May 17, with the first deliveries of vehicles equipped with the systems due in the summer, according to Mercedes. Up to now, driver assistance systems s…