I claim the ornamental design for 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 elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a side elevational view thereof;
FIG. 5 is an opposite side elevational view;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines are for the purpose of illustration and form no part of the claimed design. The line segments on the surface portions indicate contour and not surface decoration.