Something

app::app()
{
...
camera = mSceneManager->addCameraSceneNode();
	lookatCube = mSceneManager->addCubeSceneNode(0.0f,camera,-1,vector3df(1,0,0));
        camera->setParent(lookatCube);
	carData.carBodyNode = camera;
...
};

int app::run()
{
...
while(mIrrDevice->run() && mIrrDevice && !mRestart)
	{
               ...
               camera->setTarget(lookatCube->getPosition());
		mSceneManager->drawAll();
		mGUIEnvironment->drawAll();
		core::vector3df pos = lookatCube->getPosition();
               ...
	}
...
}