Heated seats installation prebuild ?

[Is200_bg]

Ok so heres the thing. I have regular non heated seats and on my dashboard there is only the traction buttons no buttons for heating the seats so i wanted to buy seats with heating  but a dude told me that those systems are prebuild in every car and i just need to install the button for it to work. Any of you got any idea if this is true or not ?

[Scotlex]

I would think that most of the wiring would be there but I don't think that the heating element in the seat would be there.

There are probably a few different seat types that are fitted in the factory (standard/electric/heated etc.)

I could be wrong though.

[ColinBarber]

I think if you have powered seats then the wiring is there - there are only a couple of different floor wiring looms on the IS200, one for manual the other for powered seats.

The seat cushions definitely have different part codes though depending on whether heaters are included or not, so you would at least need to purchase those and the switches.