You can't rightly tell for them to win the remaining Bundesliga title game, Bayern Munich is indeed a strong team, they remain the favorite in the League and no team yet seems ready to deny them the fact of winning the title, Leverkusen are approaching to cover the space but since they lack consistent outright performance, shielding the first position ahead of Bayern is fairly impossible.
The struggle for the Champions League title may seem to affect their performance in the Bundesliga, if they should get knocked out by Inter then Leverkusen or whoever should abandoned the race for the title because certainly Bayern will return their best performance to the domestic league.
In conditions like now Bayern Munich are much more favored to emerge as candidates for the Bundesliga title although in total Leverkusen will try to put pressure on them so that they experience obstacles in the remaining matches. But if you look at the chances it is almost certain that Bayern Munich will almost reach the Bundesliga championship because so far their game is much better compared to Leverkusen.
I think whatever results they get in the Champions League for the Bundesliga title race will not affect, even if they are eliminated by Inter Milan and they will definitely not make mistakes in the Bundesliga.