BMW is hitting the track with two very different kind of wheeled machines: an M4 GTS converted to safety-car duty for DTM, and a wheelchair for the US paralympics team. DTM touring car series.

BMW has fitted a water-injection system and innovative OLED taillights to its new Concept M4 GTS, arriving this weekend at the Pebble Beach Concours. The new system injects water directly into the ...