A vehicle includes a roof panel assembly and a sunroof glass panel. The roof panel assembly defines an opening. The sunroof glass panel has an arm extending from a side thereof. The sunroof glass panel is configured to cover the opening in the roof panel assembly and operable between a closed position, an open position, and a tilted position. The arm extends outwardly past a periphery of the opening in the roof panel assembly. The arm is configured to engage the roof panel assembly to restrict movement of the sunroof glass panel relative to the roof panel assembly.