2016 Audi A4 / S4 — Owner's Manual
Engine speed! This driver message appears in vehicles with manual transmission if the driver had not upshifted or downshifted in time while using adaptive cruise control braking or accelerating, causing the vehicle to exceed or not reach the permitted limit speed. The adaptive cruise control turns off. A chime sounds as a reminder. Shift lever position! Vehicles with an automatic transmission: the driver message appears if the selector lever is shifted to the N position.
The adaptive cruise control is not available while in this position. Vehicles with manual transmission: the driver message appears for vehicles with manual transmission if there is no forward gear engaged, meaning if the reverse gear or the 1st gear is engaged or if the selector lever is in the neutral position. The adaptive cruise control is not available while in this position. Stabilization control (ESC).
This message appears if the electronic stabilization control (ESC) is taking action to stabilize the vehicle. The adapt ive cruise control tu rns off. A chime sounds as a reminder. Speed too low.
This message appears if the current speed is too low to set or to maintain the desired speed. The speed being saved must be at least 20 mph (3 0 km/h). The cruise control is turned off for speeds lower than 12 mph (20 km/h). The adaptive cruise control remains turned on for speeds above 95 mph (150 km/h) (override).
It will stabilize again at 95 mph (150 km/h) when the driver takes his foot off of the gas pedal.