Daimler Global Media Site - Mercedes-Benz innovation: NANOSLIDE technology uses the twin-wire arc spraying process to melt metal wires and spray the molten material onto the internal cylinder wall with the help of a gasflow. Final finishing of the resulting, layered ultra-fine to nano-crystalline iron coating creates an almost mirror-like surface with fine pores, which considerably reduces friction and wear between the piston assembly and the cylinder wall.