The map helps, thanks!
Ok I will clarify my actions with Max now that I can see the layout.
The doors to Max's room look like double doors, and considering doors usually open into a room. He will crack open the right door slowly and slightly and peer out it. That should direct his view towards the doorway there which leads to the stairway, though he doesnt know that.
Assuming the Germans are headed towards the noise, and the door to the stairwell; I know they are sort of facing in his direction but their attention should be mostly on that door. If that is the case then he will follow through with the attack that I mentioned in my post.
So I am not really changing my actions I am just clarifying some details.
Hoping for a little surprise here from a direction they are not expecting; putting on his best Chow Yun-fat impression.