The ornamental design for a vehicle, as shown and described.
FIG. 1 is a rear elevational view of a vehicle showing my new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a top, front and right side perspective view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof; and,
FIG. 7 is a top plan view thereof.
The portions of the vehicle shown in broken lines throughout the drawing views are for illustrative and environmental purposes that form no part of the claimed design.