One problem related to car will not start has been reported for the 2013 Audi S6. The most recently reported issues are listed below.
Transmission coolant valve failure. Audi has issued TSB for several models related to same failure mode. Coolant sprays from coolant valve onto electrical connectors internal to transmission causing corrosion within the connectors. Two fault modes. 1. Vehicle fails to start as vehicle doesn't know transmission condition (neutral, park or otherwise). 2. If you can get it to start - vehicle is in limp mode service 2wks to replace failed valve and repair corroded electrical connectors within transmission.
| Electrical System problems | |
| Car Will Not Start problems |