MERCEDES-BENZ, The modern SL cars: R107, R129, R230, R231: S. Koehling, Bernd: 9781484108246: Amazon.com: Books
Mercedes-Benz 300 SL - Wikipedia
MERCEDES-BENZ, The modern SL cars, The R107 and C107: From the 350SL/SLC to the 560SL and 500 Rally: Koehling, Bernd S.: 9781516859733: Amazon.com: Books