It could have broken down, my workmate purchased a new Audi A4 DSG diesel, the A4 was a joke, in and out of the workshop, in the first 6 months of ownership he was in courtesy cars for 4 months while the some big ticket items were replaced under warranty, a failed ECU was one of them, body panel water leaks, and the DSG transmission had excessive shunt and backlash during gearchanges. His next car choice a diesel Jaguar, reliable but terrible depreciation, his latest car a Volvo so far no issues.