Temperatures that are no joy, continuous rain, approaching thunderstorms with gale-force winds. The weather forecast on this Thursday does not really invite us to take a car trip to Switzerland. But our AMG bravely wears sunshine yellow with powerdomes, thick tailpipes and an aerodynamics package whose grey rear wing harmonises well with the dreary grey of the clouds. An A 45 S, 421 hp from a newly developed two-litre turbo, the most powerful production four-cylinder in the world, 500 Nm maximum torque. Flap exhaust, launch control and 19-inch wheels as standard, plus clever all-wheel drive. Zero to one hundred would be possible in 3.9 seconds, but in the current weather moment on the German autobahn in the direction of Singen this would only be theoretic, and in Switzerland it would not exactly be advisable either.