There is much more to the IAA in Frankfurt than a dazzling array of new cars. At the world's biggest auto show, suppliers' stands bristled with lightweight innovations to help reduce emissions as well as improve driver safety, comfort and communications. Matthew Beecham caught-up with executives from some of the world's leading component suppliers. In this second instalment, we take a look at the main IAA messages from Tenneco, Faurecia, Magna and Plastic Omnium.