Since 2024, the `S5 Avant B10` has effectively replaced the old `S4` reading and become Audi's reference petrol `S` estate in Europe. Against a BMW 3 Series, it relies on a modern `V6`, a highly digitised cabin and a fast-family positioning loaded with technology. On the used market these are still very recent cars, so the key issue is not yet heavy wear but the quality of dealer follow-up and the consistency of updates.
The package revolves around the mild-hybrid `3.0 TFSI V6` `EA839`, paired with `S tronic`, all-wheel drive and a lot of electronics around the powertrain. On this phase you mainly need to read software, `ADAS`, the `12 V` battery, thermal management, restart quality, gearbox behaviour, sensors and the consistency of the equipment. A recent car that is badly calibrated or poorly followed by the network can be more troublesome than one with more miles but fully up to date.