protected Vehicle(ICarColour carColour, IWheel wheel, Brand brand, Numberplate numberplate, EngineClass engine)
{
this.brand = brand;
this.carColour = carColour;
this.numberplate = numberplate;
this.wheel = wheel;
this.engine = engine;
id = ++counter;
price = wheel.Price() + carColour.CalculatePrice() + brand.GetPrice() + engine.GetPrice();
}