Thanks- I have read several articles from different types - I definitely will only go OEM.

My 'confusion' is that there are no 'heated seat cover' parts listed in the ETK - the only covers relate to colour and material, hence my thought that the heating bits are already fitted.

I may have a butchers at the seat wiring as there is a note about the heating element cabling in the WDS - I'll see if I can find the cable colours noted and perhaps stick an avo on to see if they show a heating element type resistance...