The ornamental design of a vehicle, as shown and described.
FIG. 1 is a front and side perspective view of a vehicle showing my new design;
FIG. 2 is a front and opposite side perspective view thereof;
FIG. 3 is a rear and side perspective view thereof; and;
FIG. 4 is a rear and opposite side perspective view thereof.
Any broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are directed to environment and/or are for illustrative purposes only. The broken lines form no part of the claimed design. The bottom of the vehicle and/or any other portion of the vehicle not viewable in the drawings forms no part of the claimed design.