The ornamental design for a vehicle, as shown in the figures and described.
FIG. 1 is a front perspective view of a vehicle illustrating the design of the present invention;
FIG. 2 is a front view of the vehicle of FIG. 1;
FIG. 3 is a right-side view of the vehicle of FIG. 1;
FIG. 4 is a rear perspective view of the vehicle of FIG. 1;
FIG. 5 is a rear view of the vehicle of FIG. 1;
FIG. 6 is a left-side view of the vehicle of FIG. 1;
FIG. 7 is a top view of the vehicle of FIG. 1; and,
FIG. 8 is a bottom view of the vehicle of FIG. 1.
In the figures, shading represents contour and not any particular color. Structure that is not part of the claimed design is represented in the figures by broken lines.