winter tires without tyre pressure control! what does it look like technically and legally?

hello together…. we drive an opel zafira c tourer 2.0 bj 4/2014 with tire pressure control we bought the car 4 months ago used! we need winter tires now!!! have found on ebaysmall advertisements for a narrow taler which , the problem , they have no tire pressure control! what does it look like legal and technical???? may / can I drive them??? legal think yes!!!?? the car is 4/2014 but only from 11/2014 is it obligatory!!!?? but what does it look technically a us?? beep it all the time, all the time comes a error message in the display? thanks for your help! Greetings Thorsten