ajky

getUsers() {
  return this.authHttp
    .get(APP_SERVER + 'api/users')
    .map((response: Response) => response.json());
}

constructor(svc: UserService) {
  svc.getUsers().subscribe((response) => console.log(response));
}

getCars() {
        var params_list = {
                param1:             1,  // 1 - ID параметра
                param2:             2,
                param3:             3,
                ...
                paramN:           N
            }
        
        for(let key in params_list){
            this.authHttp.get(APP_SERVER + '?car_param=' + params_list[key])
            .map( (response: Response) => response.json() )
            .subscribe(
                (data) => {
                    data["name"] = key;
                    this.carsParams.push(data);
                },
                (error) => {
                    console.log('error');
                }
            );
        }
    }