for 38L you might want to up your amounts as I work that out to be 1.039 OG. Also at 3.5% AA its only 8 IBU. Also it's too light. If you can get some carafa special III i'd bung some of thatin,
With the % you gave I'd go with
Fermentables
Ingredient Amount % MCU When
German Dark Wheat Malt 2.984 kg 34.9 % 3.7 In Mash/Steeped
UK Flaked Wheat 1.791 kg 20.9 % 0.7 In Mash/Steeped
German Dark Munich Malt 1.373 kg 16.0 % 2.3 In Mash/Steeped
German Bohemian Pilsner Malt 1.194 kg 14.0 % 0.4 In Mash/Steeped
US Carapils Malt 0.716 kg 8.4 % 0.2 In Mash/Steeped
German CaraMunich I 0.298 kg 3.5 % 2.0 In Mash/Steeped
German Carafa III 0.200 kg 2.3 % 19.9 In Mash/Steeped
Hops
Variety Alpha Amount IBU Form When
German Hallertauer Hersbrucker 3.5 % 56 g 11.4 Loose Whole Hops 60 Min From End
German Hallertauer Hersbrucker 3.5 % 56 g 2.3 Loose Whole Hops 5 Min From End
Other Ingredients
Ingredient Amount When
Yeast
White Labs WLP300-Hefeweizen Ale
I did a dunkelweizen the other day
HERE Has turned out a cracker!

Little bit too much dark crystal though. Would scale it back a bit next time, or use special B