Print & Online Audi Car Repair Manuals - Haynes Publishing Among the most popular Audi models is the A4 and the Quattro. The Audi Quattro was the first production car with all-wheel drive, and also featured a turbocharged engine. The ultra-luxury versions of some Audi models use the Volkswagen Group W12 engine, as opposed to the conventional V12 engine. When it comes to the repair and service of your Audi A4 Manual | eBay An Audi A4 repair manual shows you common repairs and what parts are needed, so you can save money by fixing it yourself. The Audi A4 owner's manual covers all the basics, from recommended maintenance to how to work the stereo, adaptive cruise control, and parking assist, so you really will know your car inside and out.