Hot of the heels of their successful Youngtimer Collection sale at Essen 2019, RM Sotheby's will once again feature 18 additional cars from the Youngtimer Collection at their upcoming sale in London on October 24. Some highlights include a 1999 Mercedes-Benz SL 73 AMG, a 1991 Mercedes-Benz 560 SEC AMG DOHC 6.0 "Wide-body", a 1999 Bentley Continental SC and even a Lamborghini …