For more than 25 years, informed BMW owners have relied upon the Roundel, the magazine of the BMW Car Club of America, to make their "Ultimate Driving Machines" more ultimate. Now a selection of articles on driving, performance, service and tech tips have been collected in a single book. No matter what BMW you drive or desire, this book will serve as a valuable maintenance guide, performance handbook and technical reference source, to help you understand and care for your BMW.