We present the most extreme adventure of the SEAT Leon X-PERIENCE: the Summer Test. 20,000 km, 50 technicians and over 40ºC temperatures. Our mission was to test the limits of our new car under extreme conditions and each of the tests had a clear objective. Among the many challenges, these were some of the tests: to know when the air filter in the engine needs changing and to analyze the impact of the gravel on the undercarriage, wheel arches and bumpers, to check that the components do not make any noises or cause discomfort (klapper test) and to verify the correct functioning of the stability control systems. A great journey to satisfy the most extreme challenge. Discover the new SEAT Leon X-PERIENCE here: http://bit.ly/1wxSoTR