The next generation Audi S4 Avant and S5 Coupe have been caught on camera yet again, this time providing a better look at the interior.

Just like the exterior, Audi is playing it safe by taking the evolutionary route as far as the cabin's layout which isn't all that different compared to the outgoing model. The S4 Avant spotted with the door open was most likely a lesser trim as it had conventional dials whereas upper-spec models are likely going to be offered with a fully digital instrument cluster as seen in the latest TT and Q7.

We notice the new three-spoke steering wheel wrapped around in leather and a metallic strip on the door panels and dashboard while from a previous set of spy shots we saw a similar metallic strip on the car's sides and at the back. The red emergency button indicates this is a test prototype so it might not have all the final bits and pieces, but we do notice what appears to be a bigger rotary knob for the MMI infotainment system.

Audi has announced the A4 (B9) will be introduced before the end of this month, but the S4 probably won't be out until early 2016. The next generation A5 should follow a few months later and it will be eventually joined by a new S5.