Its German so it's "vain" the e sounds as long A
Perhaps in some dialect. But ei in the Neuhochdeutsch I learned in school it would be pronounced with a long I== eye. As in weinen, Weihnachten, weil, etc.
For any German speakers, imagine the consternation when my young bride asked at an apothecary shop for some rub-on salve for her "Mann" who had a "Feber" when she used a German pronunciation of the English-named product and pronounced the word for that which is called Vicks (in English), but spelled Wicks auf Deutsch.
This is how you pronounce the "ie" or "ei" combination auf Deutsch. You look at the second letter (e or i). Then you pronounce the combination as if it were the English equivalent of the second letter. It virtually always works.