Bayern Munich president Herbert Hainer believes that the team has the class to win the Champions League, the only competition left for them to earn silverware this season. Bayern host Arsenal in a quarter-final second leg match on Wednesday, after playing to a 2-2 draw last week in London at the then Premier League leaders. Title holders Manchester City or record winners Real Madrid would await them in the semis en route to the June 1 final at Wembley, and Hainer told Tuesday’s Müchner Merkur/tz papers the team can go all the way. “With the form from the first leg against Arsenal I believe the…