I claim the ornamental design for a vehicle, as shown and described.
FIG. 1 is a perspective view of a vehicle, showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a right-side elevational view thereof;
FIG. 5 is a left-side elevational view thereof; and,
FIG. 6 is a top plan view thereof.
The broken lines showing engine and suspension components in the figures depict environmental matter and form no part of the claimed design. The bottom plan view forms no part of the claimed design.