A perfect combination of luxurious and sporty? Putting the new Porsche Panamera 4S to the test… The trendy Italian? Or the practical German? The Fiat 500 and the Ford Ka - we compare two speedy urbanites! present it! Porsche PanameraPorsche presents its new luxury four-door coupé, combining the sportiness of a classical Porsche with the comfort and space of a top-of-the-range family saloon.drive it! belts up in the Panamera 4S as it accelerates from zero to 100 km/h in 5 seconds. The Panamera goes on the market in Europe, South American and parts of Asia in September, North America in October and Australia, as well as China in 2010. compare it! The Fiat 500 and the Ford KaTwo small cars do battle: the Fiat 500 and the Ford Ka. Friends Elif and Michaela put the Italian cult car and the efficient German run-around through their paces for drive it!.Although both cars are in the same class, their design couldn’t be more different. Find out whether the Fiat 500 is sportier or the Ford Ka is spacier in this week's program. spot it! The Schwalbe AssociationUnterstedt, near the northern German city of Bremen, is a village obsessed with the Schwalbe moped. Around 60 of its 900 inhabitants are members of the local Schwalbe association. Originally manufactured by the East German firm Simson, it was simple and practical: it was the motorbike of the masses. Even the children's television character the Sandman drove a Schwalbe. You can pick up a used one today for 400 euros, and the internet is awash in spare parts.test it! Ecological vs. Summer TiresWith gas prices high, efficiency is the code word. Tires with low roll resistance save energy. But does reduced resistance compromise a vehicle's safety? Drive it! tests four brands of tire for roll resistance, fuel-saving potential and braking distance on dry and wet surfaces. We show what drivers favoring energy-saving tires should consider before switching.admire it! Lamborghini DentistDr. Georg Pfaffmann is Germany's fastes...