TPMS A4 Progressive 2017
 

Hi
This is my first audi car and have the following questions and hope someone can help to clarify:
1.is TPMS of this A4 indirect
2.I've just changed (not through dealer) to winter tire (Continental WinterContact SI, 225/50/R17 with psi 36 in both front and rear), I didn't receive any TPMS signal light on. Is it correct?

Regards