MERCEDES-BENZ, The SLK models: The R170: Koehling, Bernd S.: 9781505421507: Amazon.com: Books
Mercedes-Benz, The SLK story, R170 with comprehensive buyer's guide, VIN, data card explanation and all option codes listed: From the SLK200 to the SLK32 AMG and tuners, updated February 2017 - Kindle