REVIEWS: Mercedes SL280 • Nissan Micra • Aston Martin Lagonda • Audi TT CHALLENGE: Top Gear Generation Game Cars from different eras are compared this week. Jeremy drools over the Mercedes 280SL from the early 70s and compares it to the modern Audi TT. The new Nissan Micra which costs £9,000 is compared to a Boeing 737 private jet worth £38m. James takes a nostalgic look at the Aston Marti