Hello Comfortablynumb. I can confirm my 2021.25 Build ST Line X Edition has heated front and rear seats and heated steering wheel. I did not choose a winter pack, it just now comes with it on the latest spec.
Cars On Motability
2009 Citroen C4 Grand Picasso
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2013 Skoda Superb Estate
2016 Seat Alhambra
2020 Seat Tarraco
2021 Ford Kuga
2024 Nissan X-Trail left in Sep 25