Few people know about this, but Michael Schumacher’s entrance into Formula 1 was supported by Mercedes Benz. In 1990, along with Karl Wendlinger and Heinz-Harald Frentzen, Schumacher joined the World Sports-Prototype Championship. (Basically, he was racing Group C cars).
This was designed to be a strategy, much like Paul Di-Resta’s DTM career, to gain Michael more exposure on an international racing scene. When Michael was provided the opportunity to move into Formula 1 with Jordan, Mercedes help to support that transition.