Unfortunately you will be in solid IMC all the way from FL 150 down to around 2000 feet. It's a pity really because until the German border the weather should be clear, crossing the border into Germany you'll have an overcast around 4000 feet up to FL 65 and this will remain pretty much the same until you get near Buckeburg where it becomes pretty much overcast right the way up to FL140, possibly due to the Weser Bergland.
Having said that, at the moment it looks like you could fly between the cloud levels if you were to look at arriving around 12 UTC - then it's showing you'd have an overcast between 2000 - 3500feet, FL 50 - FL70 and FL140 to FL150.
But the situation could change tomorrow.... this is just what I see from the DWD website......