The distributor has no official information regarding this question. However he thinks it's possible.

The massage mat is absolutely unsuitable for use in the car. I bought it to get a massage while gaming on the PC. If you slide back and forth a little on the mat, these "nipples" press quite a bit into your back, which makes it pretty useless for gaming. Now imagine you're sitting in the car and these nipples are pressing into your back. First of all, that's not pleasant, and secondly, it's probably dangerous if you're constantly distracted by the thing. My conclusion: Absolutely useless for the car and definitely illegal.

Yes, according to the manufacturer, the MC825 has a switchable red light and heat function.