A guide wire includes: a flexible elongate wire body; and a coating layer that covers a distal portion of the wire body and is formed of a resin material. Activation of the transmission ratios occurs by actuating a shift element such that the respective loose wheel can be connected, in a rotationally fixed manner, to the main shaft. A sump port is at the distal end. Ruthenium, which is a preferred nonmagnetic material for spacer layers with cobalt being the preferred magnetic material.