The ornamental design for a vehicle, as shown and described.
FIG. 1 is a front perspective view of a vehicle showing my new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a side elevational view, the opposite side elevational view being a mirror image thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof; and,
FIG. 6 is a top plan view thereof.
In some of the photographic drawings, the background shows various contrasts, applicant disclaims any colors, contrasts or textures implied by the backgrounds as these form no part of the claimed design.