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Contents Introduction 4 Body 6 Occupant protection . 12 Engine 22 Running gear 38 Convenience electronics 44 Infotainment 50 The Self Study Programme conveys basic principles with regard to the design and function of new models, new automotive components or new technologies. Reference Note The Self Study Programme is not a Repair Manual All values given are intended as a guideline only, and refer to the software version valid at the time of publication of the SSP. For maintenance and repair work, always refer to the current technical literature. Introduction Overview Dimensions of the A3 Sportback. 332 051 4 Body The body of the Audi A3 Sportback has a highly rigid and crash optimised occupant cell. Special attention was given to the following aspects ● the body rigidity, ● the steering column rigidity, ● local rigidity in highly stressed areas, ● interior acoustics and driving comfort, ● the crash optimised body structure and ● the hybrid construction of the front end. Front view of the body in white 332 048 Rear view of the body in white 332 049 By using state of the art calculation and simulation methods, new materials and joining techniques, and by optimising the joining sequence during the bodyshell assembly process, it was possible to increase body rigidity by 20 compared to the predecessor model and enhance the crash performance of the body structure. 5