2015 Audi A3 Sedan / S3 Sedan — Owner's Manual
The transmission automatically selects a gear that is suitable for the incline. Hill descent control tries to maintain the speed achieved at the time of braking, within physical and technical limitations. If may still be necessary to adjust the speed with the brakes. Because hill descent control cannot shift down farther than 3rd gear, it may be necessary to shift into tiptronic mode in very steep areas.
In this case, shift into 1st or 2nd gear in tiptronic mode to use the engine's braking force to relieve the brakes. Hill descent control switches off once the decline levels out or you press the accelerator pedal. If the shift paddles are tapped while in the D/S selector lever position, automatic mode switches off briefly. To switch from manually shifting back to automatic shifting immediately, tap the shift paddle fig.
76 for 1 second. To keep shifting using the shift paddles, move the selector lever to the right out of the D/S position into the tiptronic shift gate. The transmission automatically shifts up or down before critical engine speed is reached. The transmission only allows manual shifting when the engine speed is within the permitted range.
When you press the accelerator pedal down beyond the resistance point, the automatic transmission downshifts into a lower gear, depending on vehicle speed and engine RPM. It shifts up into the next higher gear once the maximum specified engine RPM is reached.