It is highly advisable to keep a proper car or service manual. It is an important component in every toolbox. Aside from providing step-by-step instructions on how to perform repair and maintenance tasks, a good repair manual also contains must-have information like torque specifications, tightening sequences, and safety procedures. Best of all, an authoritative repair manual will also tell a car owner's locations and all sorts of tricky fasteners while providing advice on how to deal with them.