One problem related to check engine light on has been reported for the 2013 Audi A5. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Audi A5 based on all problems reported for the 2013 A5.
The vehicle suffered complete engine failure at 52,000 miles. On may 05'19 the car was running smoothly at prevailing highway speed when I started to hear the sound of marbles rattling around in the engine compartment. Pulled over, and then the check engine light came on. Towed to Audi burlington, and the $159 diagnostic the following morning may 06'19 resulted in a voice mail that said in part "car engine is blown, the cost will be $11,000, please let us know what you'd like to do". They also suggested I could try to get Audi of America to assist so I opened a ticket with them on may 07'19 (reference number is 190452228). The service history is intact but neither Audi of America nor Audi burlington (MA) dealership will assist with the repair. Instead, both aoa and the dealer have chosen to demonize the service history because the prior owner may have missed a required annual visit and because the 35k service was not done at their dealership. When I ask what service element would have identified and prevented a blown engine at 52,000 miles, the service manager at Audi burlington responded with "a million things could go wrong if you don't have the recommended service". By the way, a perfect service history would be no guarantee of assistance as I learned ten years ago when my Audi tt blew up - I had to wait 5 years for the class action settlement to pay for that repair. It's been three weeks and I have yet to receive a callback from Audi on the case I opened with them back on may 05'19. The dealer is hounding me to decide what to do because my car is taking up precious space on his property.