Kane was the star of the show once again for Bayern as Vincent Kompany's side saw off a spirited challenge from the Bundesliga newcomers. Bayern went ahead on 18 minutes when Kane clipped a pass into Michael Olise in the penalty box. The winger shaped to shoot but instead cut the ball back to Jamal Musiala to slot home the opener.
Kiel might have feared the worst at that point but could have been level minutes later. Lewis Holtby pounced on a loose ball into the box and fired past goalkeeper Manuel Neuer, but Bayern were indebted to Kim Min-jae who had raced back and hooked clear off the line.
Bayern did have other chances with Olise hitting the post and Aleksander Pavlovic denied by a great save from goalkeeper Timon Weiner. Yet Kiel were undone again just before half-time after some patient build-up play that ended when Kingsley Coman clipping a ball in for Kane to head home from close range
The second half started with Kane scoring again to put the game out of sight. Once more the ball was sent into the box, this time by Raphaël Guerreiro, for Kane to nonchalantly head past Weiner. A fourth followed fairly promptly through Serge Gnabry, as the half-time substitute pulled the ball down with his left foot and then smashed home on the volley with his right.
Yet Holstein Kiel did give their fans something to think about on the hour as they pulled one back. Timo Becker stole possession and freed Finn Porath who fired a brilliant effort across goal and past Neuer.
And the visitors weren't finished there either. Two stoppage-time goals from Steven Skrzybski made for an extraordinary finish to the game and left Kompany scowling on the touchline despite his team's win.