Paul Bracq was the design director for both Mercedes-Benz (1957-1967) and rival BMW (1970-1974.) During his time at Mercedes he designed multiple classics, with the 230/250/280 SL perhaps being his best-known.
But for me Bracq's socks-knocker was the E25 Turbo concept car he designed for BMW.
As it's the latter brand that commissioned the video below, you won't hear a peep about those SL's, but you will get to hear Bracq discuss the E25, the 5-Series and others. It's also awesome to see he's still sketching into his 80s, and I like a designer who proudly states that he spent more time in the shop than the studio.