The Volkswagen erWin service information source contains all published service information for Volkswagen and Audi vehicles sold in the U.S. and Canada and any additional information necessary to help aftermarket service providers, auto body repair specialist, or owners professionally service these vehicles. Technicians can use the guided search to find specific vehicle information. Model, engine and transmission codes are available through the "build guide." Because the information is provided online, it is continuously updated and always current, according to the company. To register, users can visit https://erwin.vw.com or https://erwin.audiusa.com.