#20 Mercedes S-Class tech * Cupra’s electric hot hatch * Driving Doctor speaks * Car auctioneer secrets

Ace driving driving instructor Paul Ripley is the special guest in this week’s Auto Express podcast. He reveals the secrets of making you a better, safer and more efficient driver, and joins Vicki Butler-Henderson, Steve Fowler and Sean Carson in discussing the new Nissan Ariya, Mercedes S-Class and Cupra el-Born. Vicki chats with top historic car auctioneer Mathew Priddy, and Hugo Griffiths answers more of your motoring questions.