diff --git a/VectoCore/VectoCore/InputData/FileIO/JSON/JSONInputData.cs b/VectoCore/VectoCore/InputData/FileIO/JSON/JSONInputData.cs
index 5778ab048765415f4a40e5ffc80965082e801115..3bc2b7ce19b77b193425a9f2843ce70013765dbd 100644
--- a/VectoCore/VectoCore/InputData/FileIO/JSON/JSONInputData.cs
+++ b/VectoCore/VectoCore/InputData/FileIO/JSON/JSONInputData.cs
@@ -136,7 +136,7 @@ namespace TUGraz.VectoCore.InputData.FileIO.JSON
 		protected IPTOTransmissionInputData PTOTransmission;
 
 		private readonly string _jobname;
-		private IAirdragEngineeringInputData AirdragData;
+		protected internal IAirdragEngineeringInputData AirdragData;
 
 		public JSONInputDataV2(JObject data, string filename, bool tolerateMissing = false)
 			: base(data, filename, tolerateMissing)
@@ -329,7 +329,10 @@ namespace TUGraz.VectoCore.InputData.FileIO.JSON
 			get { return PTOTransmission; }
 		}
 
-		public XElement XMLHash { get { return null; } }
+		public XElement XMLHash
+		{
+			get { return null; }
+		}
 
 		IAuxiliariesDeclarationInputData IDeclarationInputDataProvider.AuxiliaryInputData()
 		{
diff --git a/VectoCore/VectoCoreTest/Models/Declaration/AirdragDefaultValuesTest.cs b/VectoCore/VectoCoreTest/Models/Declaration/AirdragDefaultValuesTest.cs
new file mode 100644
index 0000000000000000000000000000000000000000..c3169c9b5179bc482b17eb3318cb637fdfd40617
--- /dev/null
+++ b/VectoCore/VectoCoreTest/Models/Declaration/AirdragDefaultValuesTest.cs
@@ -0,0 +1,59 @@
+using System.Linq;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using TUGraz.VectoCommon.InputData;
+using TUGraz.VectoCore.InputData.FileIO.JSON;
+using TUGraz.VectoCore.InputData.Reader.Impl;
+using TUGraz.VectoCore.Tests.Models.Declaration.DataAdapter;
+
+namespace TUGraz.VectoCore.Tests.Models.Declaration
+{
+	[TestClass]
+	public class AirdragDefaultValuesTest
+	{
+		[TestMethod]
+		public void TestClass2()
+		{
+			var file = @"TestData\Integration\DeclarationMode\Class2_RigidTruck_4x2\Class2_RigidTruck_DECL.vecto";
+			var inputData = (JSONInputDataV3)JSONInputDataFactory.ReadJsonJob(file);
+			inputData.AirdragData = null; // force use of standard values
+
+			var dataReader = new DeclarationModeVectoRunDataFactory(inputData, null);
+			var runData = dataReader.NextRun().ToArray();
+			var runDataOrig = DeclarationAdapterTestHelper.CreateVectoRunData(file);
+
+			Assert.AreEqual(4.83, runDataOrig[0].AirdragData.DeclaredAirdragArea.Value());
+
+			Assert.AreEqual(7.2, runData[0].AirdragData.DeclaredAirdragArea.Value());
+		}
+
+		[TestMethod]
+		public void TestClass5()
+		{
+			var file = @"TestData\Integration\DeclarationMode\Class5_Tractor_4x2\Class5_Tractor_DECL.vecto";
+			var inputData = (JSONInputDataV3)JSONInputDataFactory.ReadJsonJob(file);
+			inputData.AirdragData = null; // force use of standard values
+
+			var dataReader = new DeclarationModeVectoRunDataFactory(inputData, null);
+			var runData = dataReader.NextRun().ToArray();
+			var runDataOrig = DeclarationAdapterTestHelper.CreateVectoRunData(file);
+
+			Assert.AreEqual(5.3, runDataOrig[0].AirdragData.DeclaredAirdragArea.Value());
+			Assert.AreEqual(8.7, runData[0].AirdragData.DeclaredAirdragArea.Value());
+		}
+
+		[TestMethod]
+		public void TestClass9()
+		{
+			var file = @"TestData\Integration\DeclarationMode\Class9_RigidTruck_6x2\Class9_RigidTruck_DECL.vecto";
+			var inputData = (JSONInputDataV3)JSONInputDataFactory.ReadJsonJob(file);
+			inputData.AirdragData = null; // force use of standard values
+
+			var dataReader = new DeclarationModeVectoRunDataFactory(inputData, null);
+			var runData = dataReader.NextRun().ToArray();
+			var runDataOrig = DeclarationAdapterTestHelper.CreateVectoRunData(file);
+
+			Assert.AreEqual(5.2, runDataOrig[0].AirdragData.DeclaredAirdragArea.Value());
+			Assert.AreEqual(8.5, runData[0].AirdragData.DeclaredAirdragArea.Value());
+		}
+	}
+}
\ No newline at end of file
diff --git a/VectoCore/VectoCoreTest/VectoCoreTest.csproj b/VectoCore/VectoCoreTest/VectoCoreTest.csproj
index ec72bf8be2432ecd2dfc4d474f579189f5efbf1d..444be981ad5b6f9858ec0db91d584d26669fe3a8 100644
--- a/VectoCore/VectoCoreTest/VectoCoreTest.csproj
+++ b/VectoCore/VectoCoreTest/VectoCoreTest.csproj
@@ -95,6 +95,7 @@
     </Compile>
     <Compile Include="Integration\ShiftStrategy\ShiftStrategyTest.cs" />
     <Compile Include="Integration\TorqueLimitsTest.cs" />
+    <Compile Include="Models\Declaration\AirdragDefaultValuesTest.cs" />
     <Compile Include="Models\Declaration\DataAdapter\DeclarationAdapterTestHelper.cs" />
     <Compile Include="Models\Declaration\DataAdapter\DeclarationDataAdapterTest_Class5.cs" />
     <Compile Include="Models\Declaration\DataAdapter\DeclarationDataAdapterTest_Class2.cs" />