Seat heating in the MV6 gets too hot and smells…

Tach all together, I had already posted in the other forum (“KFZ Forum”, but that has disappeared since today. Now to my first problem: The sitting heating of my leather seats gets particularly hot and smells strange after a short time…unfortunately this is not adjustable, but only switchable on and off. A friend said that it could be due to heating spirals…I have no idea. Who can help? A nice weekend Marcus