Audi Quality Assurance has conducted its 100th ‘INKA’ test – on an Audi A4. The Ingolstadt corrosion and aging test is one of the toughest assessments a car has to go through at Audi. Performed at the Audi global headquarters, it simulates the challenges of 12 years of a car’s lifetime in a span of just 19 weeks. Quality Assurance uses this method to verify an Audi’s effective corrosion protection and durability.