I. Introduction and Motivation
EXCEPT for the recession in 2008 worldwide vehicle market has been growing steadily. According to the figures of The International Organization of Motor Vehicle Manufacturers (OICA) the vehicle industry requires the employment of more than eight million people directly in manufacturing the vehicles and the parts that are built into them. This accounts for over five percent of the world's total manufacturing employment [1]. Competition in the industry motivates the manufacturers to introduce new technologies, comfort and safety solutions resulting in the high employment level of their research and development departments.