Identify which class data members are not accessible in a method

Let us take an example of private inheritance and inner class. Classes Car and Vehicle are related by private inheritance. Car also has an inner class/struct SpeedoMeter and a private instance of it.

class Vehicle {
public:
  //..public interface and constructor
protected:
  std::string color_;
  std::string manufacturer_;
private:
  int identifier_;
};

class Car : Vehicle {
public:        
  // ..public interface and constructor
  void PrintInfo() {
      /* ... access and print attributes
             color_, numOfDoors etc..
     */
   }        
private:
  struct SpeedoMeter {
    // ... constructor ..
    double mileage_;
  };

  SpeedoMeter speedoMeter_;
  int numOfDoors_;
  std::string model_;
};

The public method Car::PrintInfo is supposed to log all the properties of Car. Identify below all the properties or data members that are not accessible from method Car::PrintInfo: