The front section of the new RS 4 Avant was completely redesigned. The RS 4 Avant differs considerably from the A4 Avant. The Singleframe is wider and flatter as compared to the base model. Just like its big RS brothers, the RS 6 Avant (combined fuel consumption in l/100 km: 11.7–11.5 (20.1 –20.5 US mpg); combined CO2 emissions in g/km: 268–283 (431.3–455.4 g/mi)) and the RS 7 Sportback (combined fuel consumption in l/100 km: 11.6–11.4 (20.3–20.6 US mpg); combined CO2 emissions in g/km: 265–261 (426.5–420.0 g/mi)), the RS 4 Avant also features the three-dimensional honeycomb structure in gloss black that is typical for the RS model series. To give it a clean look, the Singleframe is designed without a frame. The new eggcrate grille with the RS 4 emblem is inserted directly into the bumper with the large lateral air inlets and vertical flaps.

The shape of the LED headlights of the RS 4 Avant has also been redesigned. The optional matrix LED headlights with darkened bezels complete the revised appearance of the high-performance Avant and differentiate it within the A4 family. The wheel arches with the quattro blisters located above are each 30 millimeters (1.2 in) wider at the front and back as compared to the Audi A4 Avant. Gloss black design elements positioned right next to the headlights underline the effect of width of the new RS 4 Avant (combined fuel consumption in l/100 km: 9,2 (25.6 US mpg); combined CO2 emissions in g/km: 211-210 (339.6-338 g/mi)).