The Mallones

Hi, I purchased my second hand Audi A4 Allroad Quattro Sport (2017) earlier in the week. The advert stated that it has heated seats (and having looked at the report of what was included when it came from the factory - heated seats are listed). However, there isn't a button on the dash to turn them on. It's all pretty computer-y (and I must admit to being a bit of a luddite). Do I turn them on via that or am I missing a button OR have I been sold a car which mentioned heated seats in the advert but doesn't actually have them... Any clues would be gratefully received - I miss having a warm bum!