???????????? / ?????? ????????? ???? / ??? ????????? / ??????? (???? ????? ??? ???? ???????????)?????? / ??????? / ??????? (???? ????? ??? ???? ???????????)???????????? ??????? (???? ????? ??? ???? ???????????)On-demand AWD programs generate the secondary axle by using an active or passive coupling device or "by an independently driven push process