Audi's refreshed performance wagon has been snapped ahead of its potential reveal in Frankfurt this September.
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The facelifted Audi RS4 Avant has been spied during development testing, ahead of a likely debut before the end of the year.

Last month the company revealed the updated A4 and S4 range, which received design revisions more in line with the company's latest models, along with the latest MMI infotainment interface. The flagship RS4, however, was absent from this announcement.

In this latest set of images, we can see the all-paw super wagon isn't far off its market introduction, wearing production body panels closely aligned to the design of the updated A4 and S4 line-up, though with a more aggressive bodykit and flared guards.

Like its lesser stablemates, the RS4 will get new light units front and rear with revised LED signatures, new bumpers, and potentially new alloy wheel options.

An updated version of Audi's Virtual Cockpit digital gauges will feature, likely with RS-specific displays as per the current model, while the central infotainment display will be upgraded to a 10.1-inch setup with touchscreen functionality replacing the outgoing rotary dial.

Under the bonnet, it's unclear whether the RS4's 331kW/600Nm 2.9-litre twin-turbo V6 will get a power bump with the mid-life refresh, though we'd expect it to get a revised exhaust system to reduce emissions amidst the implementation of WLTP emissions regulations in Europe.

It's anticipated the new RS4 should make its debut before the end of the year – perhaps at the Frankfurt motor show in September, which would work out to be about six months after the wider range.

Stay tuned to CarAdvice for all the latest, and click on the images for the full gallery.