I work at a school and one of the teachers I deal with bought a brand new VW Tiguan in 2016 . This same issue happened to her . The straw that broke the camel's back for her with the car less than 20,000 ks on it was when it did it mid intersection in the city . Stalled on her several times before that.
She said she was stranded , and took her several try's to get it moving again . Took it to the dealership and like the Mondeo no faults were found. She ended up taking a financial hit , traded it on a Corolla for peace of mind . It was the diesel too . I wonder do Ford and VW use the same components and computers by any chance ?. Read this dealing with VW out of interest just as a reference for your Mondeo incase of any correlation .
http://www.carproblemzoo.com/volkswa...g-problems.php ...Cheers