BERLIN (AFP) - Bayern Munich demolished Bayer Leverkusen's credentials as German title contenders with a comprehensive 5-1 win on Sunday as Germany striker Mario Gomez bagged a first-half hat-trick. Second-placed Leverkusen came to Munich's Allianz Arena looking for their first win at Bayern since 1989 and to close the five-point gap behind league leaders Borussia Dortmund, who face Freiburg later on Sunday. But Bayern bounced back from last Sunday's sacking of coach Louis van Gaal to floor their guests and end Leverkusen's five-game winning streak. An own goal by Leverkusen captain Simon Rolfes, Gomez's treble and a fine individual goal from France's Franck Ribery did the damage for Bayern. Germany star Bastian Schweinsteiger and goal-scorer Ribery both brushed off pre-match injuries to play their part in the rout and hand caretaker coach Andries Jonker his first win in charge. Ironically, Levrkusen coach Jupp Heynckes will take charge at Bayern next season and he was given a front-row seat as his team were dismantled. The guests fell behind after only seven minutes when a corner from Schweinsteiger deflected off Rolfes' face and into his own net. The Germany star needed only 18 more minutes to complete his hat-trick, which leaves him as the Bundesliga's top scorer with 22 league goals this season and 33 in all competitions. He wrapped up his hat-trick on the stroke of half-time to leave Leverkusen 4-0 down and shell-shocked at the break.