One problem related to visibility has been reported for the 2004 Audi S4. The most recently reported issues are listed below.
While in rain all windows fogging up from inside, unable to defog, the a/c will not turn on, checked for leaks - no leaks observed, sporadically the a/c turns on and off, very common problem in cars from this year, may cause damage and injury.
| Visibility problems | |
| Wiper problems |