( CNN ) -- Borussia Dortmund marched 13 points clear in the German Bundesliga on Saturday with a 2-0 win at home to St. Pauli . Coach Jurgen Klopp 's team later saw defending champions Bayern Munich move up to second place on goal difference above Bayer Leverkusen , who host lowly Stuttgart on Sunday . Paraguay striker Lucas Barrios scored his 10th goal this season to put Dortmund ahead six minutes before halftime , while an own-goal from Ralph Gunesch four minutes after the break left St. Pauli just five points above the relegation zone . Barrios netted for the first time this year after doing well to control Nuri Sahin 's cross , and his ball across goal forced Gunesch to turn the ball into his own net with Robert Lewandowski waiting behind him to score . It was a welcome return to winning ways for Dortmund , who had drawn three of the team 's first five games of 2011 . Bayern Munich warmed up for Wednesday 's Champions League final rematch against Inter Milan with a morale-boosting 3-1 win over Mainz , who stayed in fifth place . Bastian Schweinsteiger scored the first header of his Bundesliga career nine minutes into the first half and Thomas Muller made it 2-0 five minutes into the second , with Dutch winger Arjen Robben involved in setting up both goals . With 13 minutes left , Muller helped Germany striker Mario Gomez to score his 27th goal in all competitions this season for Louis van Gaal 's team , who travel to Italy seeking revenge for May 's defeat in Madrid . Tunisian striker Sami Allagui headed his second goal in successive games in the 83rd minute , but it was too late for Mainz -- who won in Munich in September . Fourth-placed Hanover moved four points clear of Mainz with a 3-1 win over struggling Kaiserslautern , with a goal in each half from Jan Schlaudraff and another just before the interval by Mohammed Abdellaoue . The defeat left visiting Kaiserslautern third from bottom on goal difference behind 2009 champions Wolfsburg , who lost 2-1 at sixth-placed Freiburg . Wolfsburg led when Turkey striker Tuncay Sanli helped set up fellow new signing Patrick Helmes , but substitute Stefan Reisinger leveled just before halftime and Papiss Demba Cisse 's 69th-minute winner was his 16th goal this season . Hamburg claimed seventh place above Nuremberg -- 3-0 winners over Eintracht Frankfurt on Friday -- following a crushing 4-0 victory at home to Werder Bremen . Croatian striker Mladen Petric gave Hamburg the lead three minutes before halftime , then two bad second-half mistakes by Per Mertesacker gave Peru striker Paolo Guerrero a double on the counter-attack before Anis Ben-Hatira sealed victory near the end . The defeat left Bremen just a point above Wolfsburg and Kaiserslautern . Cologne came from behind to draw 1-1 at ninth-placed Hoffenheim , moving three points clear of the drop zone as Youssef Mohamad 's 69th-minute equalizer canceled out an own-goal by teammate Milivoje Novakovic soon after the interval .
Borussia Dortmund return to winning form with a 2-0 victory at home to St. Pauli . German leaders now have a 13-point advantage over Bayern Munich and Bayer Leverkusen . Germany has won its last three games in all competitions this season -- including the Champions League final against Real Madrid on Tuesday night. Hanover consolidate fourth following 3-1 win over struggling Kaiserslautern .