The Polish striker advanced with a header in the 26th minute, and added another with a falling shot after an hour of play, and also passed the decisive ball to the goal of his colleague Serge Gnabry, who scored with the heel of the foot in the 32nd minute.
Lewandowski missed a penalty before the break, but reached his third goal in the 85th minute, bringing his tally to 81 goals in the competition..
Benfica reduced the difference before the break with a header from Morato in the 38th minute, the first goal to shake Bayern in four matches in the competition, but Leroy Sane scored with a huge shot at the beginning of the second half to end his opponent’s hopes of a comeback.
The Portuguese team scored a second goal in the 75th minute through Darwin Nunez.
Bayern leads the group with 12 points after its fourth victory, and Benfica’s balance is frozen at four points. Barcelona advanced to second place with six points after defeating Dynamo Kiev, who has one point.
The top two teams from the group qualify for the playoffs.