// Topo:
new PlayerVehicle[MAX_PLAYERS];

// Comando:

if(strcmp(cmdtext, "/sultan", true) == 0)
{
    if(!IsPlayerInAnyVehicle(playerid))
    {
        new Float:p_pos[4];
        GetPlayerPos(playerid, p_pos[0], p_pos[1], p_pos[2]);
        GetPlayerFacingAngle(playerid, p_pos[4]);
        PlayerVehicle[playerid] = CreateVehicle(560, p_pos[0], p_pos[1], p_pos[2], p_pos[3], p_pos[4], -1, -1, 600);
        PutPlayerInVehicle(playerid, PlayerVehicle[playerid], 1);
    }
    return true;
}

public OnPlayerExitVehicle(playerid, vehicleid)
{
    if(vehicleid == PlayerVehicle[playerid])
        DestroyVehicle(PlayerVehicle[playerid]);
    return true;
}