diff --git a/VECTO3GUI2020/ViewModel/MultiStage/Implementation/MultistageAuxiliariesViewModel.cs b/VECTO3GUI2020/ViewModel/MultiStage/Implementation/MultistageAuxiliariesViewModel.cs
index 711b9bce5ee50f17ffc5f82927e7ae4157edfa7b..ef6b6f00fdb464a26c1108e1e35ceb7db083a679 100644
--- a/VECTO3GUI2020/ViewModel/MultiStage/Implementation/MultistageAuxiliariesViewModel.cs
+++ b/VECTO3GUI2020/ViewModel/MultiStage/Implementation/MultistageAuxiliariesViewModel.cs
@@ -216,6 +216,7 @@ namespace VECTO3GUI2020.ViewModel.MultiStage.Implementation
 
 			foreach (var multistageParameterViewModel in _parameterViewModels.Values)
 			{
+				//TODO: Nullable values getting enabled on loading a file.
 				multistageParameterViewModel.UpdateEditingEnabled();
 			}
 			OnPropertyChanged(String.Empty);
diff --git a/VectoCore/VectoCore/InputData/FileIO/XML/Declaration/Reader/Impl/XMLDeclarationMultistageInputReader.cs b/VectoCore/VectoCore/InputData/FileIO/XML/Declaration/Reader/Impl/XMLDeclarationMultistageInputReader.cs
index 46321f06615803cd907c5dde33d629546ce02e82..2758ae395721f36917ab67f6c55bb7b1bd6de133 100644
--- a/VectoCore/VectoCore/InputData/FileIO/XML/Declaration/Reader/Impl/XMLDeclarationMultistageInputReader.cs
+++ b/VectoCore/VectoCore/InputData/FileIO/XML/Declaration/Reader/Impl/XMLDeclarationMultistageInputReader.cs
@@ -542,11 +542,11 @@ namespace TUGraz.VectoCore.InputData.FileIO.XML.Declaration.Reader.Impl
 
 		private IAdvancedDriverAssistantSystemDeclarationInputData GetADAS()
 		{
-			if (GetVehiclePropertyValue<IAdvancedDriverAssistantSystemDeclarationInputData>(nameof(ADAS)) == null)
-				return null;
-
 			return _consolidatedADAS
-					?? (_consolidatedADAS = new ConsolidatedADASData(_manufacturingStages));
+					?? (_consolidatedADAS = new ConsolidatedADASData(
+						manufacturingStages: _manufacturingStages, 
+						primaryVehicleData: _primaryVehicle.Vehicle,
+						usePrimaryData: GetVehiclePropertyValue<IAdvancedDriverAssistantSystemDeclarationInputData>(nameof(ADAS)) == null));
 		}
 
 
@@ -777,8 +777,16 @@ namespace TUGraz.VectoCore.InputData.FileIO.XML.Declaration.Reader.Impl
 
 	public class ConsolidatedADASData : ConsolidatedDataBase, IAdvancedDriverAssistantSystemDeclarationInputData
 	{
-		public ConsolidatedADASData(IEnumerable<IManufacturingStageInputData> manufacturingStages)
-			: base(manufacturingStages) { }
+		private readonly bool _usePrimaryData;
+		private readonly IAdvancedDriverAssistantSystemDeclarationInputData _primaryAdas;
+
+		public ConsolidatedADASData(IEnumerable<IManufacturingStageInputData> manufacturingStages,
+			IVehicleDeclarationInputData primaryVehicleData, bool usePrimaryData)
+			: base(manufacturingStages)
+		{
+			_usePrimaryData = usePrimaryData;
+			_primaryAdas = primaryVehicleData.ADAS;
+		}
 
 		public bool EngineStopStart => GetADASPropertyValue<bool>(nameof(EngineStopStart));
 
@@ -793,6 +801,10 @@ namespace TUGraz.VectoCore.InputData.FileIO.XML.Declaration.Reader.Impl
 
 		private T GetADASPropertyValue<T>(string propertyName)
 		{
+			if (_usePrimaryData) {
+				return GetPropertyValue<T>(_primaryAdas, propertyName);
+			}
+
 			foreach (var manufacturingStage in _manufacturingStages) {
 				var adas = manufacturingStage.Vehicle.ADAS;
 				if (adas == null)
diff --git a/VectoCore/VectoCoreTest/Integration/Multistage/MultistageMultipleRunsTest.cs b/VectoCore/VectoCoreTest/Integration/Multistage/MultistageMultipleRunsTest.cs
index f90b6bed15cc584b646ae91c95393089d23bea68..53fa908bf7f368e13a99546c1166969a7f5c3b48 100644
--- a/VectoCore/VectoCoreTest/Integration/Multistage/MultistageMultipleRunsTest.cs
+++ b/VectoCore/VectoCoreTest/Integration/Multistage/MultistageMultipleRunsTest.cs
@@ -24,6 +24,8 @@ namespace TUGraz.VectoCore.Tests.Integration.Multistage
 		private const string CompletedDiesel = TestDataDir + "newVifCompletedConventional.vecto";
 		private const string CompletedExempted = TestDataDir + "newVifExempted.vecto";
 		private const string CompletedExemptedWithoutTPMLM = TestDataDir + "newVifExempted-noTPMLM.vecto";
+		private string CompletedWithoutADAS = TestDataDir + "newVifCompletedConventional-noADAS.vecto";
+
 
 
 
@@ -141,6 +143,21 @@ namespace TUGraz.VectoCore.Tests.Integration.Multistage
 
 		}
 
+		[Test]
+		public void PrimaryAndCompletedWithoutADAS()
+		{
+			StartSimulation(CompletedWithoutADAS);
+
+			var writtenFiles = GetWrittenFiles();
+			ShowWrittenFiles(writtenFiles);
+
+			Assert.IsTrue(writtenFiles.Contains(_tempFileOutputWriter.XMLFullReportName));
+			Assert.IsTrue(writtenFiles.Contains(_fileoutputWriter.XMLFullReportName));
+			Assert.IsTrue(writtenFiles.Contains(_fileoutputWriter.XMLCustomerReportName));
+			Assert.IsTrue(writtenFiles.Contains(_fileoutputWriter.XMLMultistageReportFileName));
+
+		}
+
 		//SpecialCase I
 		[Test, Timeout(1000 * 10 * 60)]
 		public void PrimaryAndInterimTest()
diff --git a/VectoCore/VectoCoreTest/TestData/Integration/Multistage/newVifCompletedConventional-noADAS.vecto b/VectoCore/VectoCoreTest/TestData/Integration/Multistage/newVifCompletedConventional-noADAS.vecto
new file mode 100644
index 0000000000000000000000000000000000000000..e96721c11b45053511438a5e64cf352725d6225d
--- /dev/null
+++ b/VectoCore/VectoCoreTest/TestData/Integration/Multistage/newVifCompletedConventional-noADAS.vecto
@@ -0,0 +1,13 @@
+{
+  "Header": {
+    "CreatedBy": "Harry",
+    "Date": "2021-09-20T00:00:00+02:00",
+    "AppVersion": "Vecto3GUI2020",
+    "FileVersion": 10
+  },
+  "Body": {
+    "PrimaryVehicle": "..\\..\\XML\\XMLReaderDeclaration\\SchemaVersion2.10\\vecto_vehicle-primary_heavyBus-sample.xml",
+    "InterimStage": "..\\..\\XML\\XMLReaderDeclaration\\SchemaVersion2.10\\vecto_vehicle-stage_input_full-sample-final-noADAS.xml",
+    "Completed": false
+  }
+}
\ No newline at end of file
diff --git a/VectoCore/VectoCoreTest/TestData/XML/XMLReaderDeclaration/SchemaVersion2.10/vecto_vehicle-stage_input_full-sample-final-noADAS.xml b/VectoCore/VectoCoreTest/TestData/XML/XMLReaderDeclaration/SchemaVersion2.10/vecto_vehicle-stage_input_full-sample-final-noADAS.xml
new file mode 100644
index 0000000000000000000000000000000000000000..247ae2e564f5d43eb1e138dc7e00aaf33e912c78
--- /dev/null
+++ b/VectoCore/VectoCoreTest/TestData/XML/XMLReaderDeclaration/SchemaVersion2.10/vecto_vehicle-stage_input_full-sample-final-noADAS.xml
@@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="utf-8"?>
+<tns:VectoInputDeclaration xmlns:tns="urn:tugraz:ivt:VectoAPI:DeclarationInput:v2.0" xmlns="urn:tugraz:ivt:VectoAPI:DeclarationDefinitions:DEV:v2.10.2" schemaVersion="2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:v2.0="urn:tugraz:ivt:VectoAPI:DeclarationDefinitions:v2.0" xmlns:di="http://www.w3.org/2000/09/xmldsig#" xsi:schemaLocation="urn:tugraz:ivt:VectoAPI:DeclarationJob V:\VectoCore\VectoCore\Resources\XSD\VectoDeclarationJob.xsd">
+  <v2.0:Vehicle id="VEH-1234567890" xsi:type="Vehicle_Conventional_CompletedBusDeclarationType">
+    <Manufacturer>Some Manufacturer</Manufacturer>
+    <ManufacturerAddress>Some Manufacturer Address</ManufacturerAddress>
+    <VIN>VEH-1234567890</VIN>
+    <Date>2021-09-19T22:00:00Z</Date>
+    <Model>Sample Bus Model</Model>
+    <LegislativeCategory>M3</LegislativeCategory>
+    <CorrectedActualMass>500</CorrectedActualMass>
+    <TechnicalPermissibleMaximumLadenMass>3500</TechnicalPermissibleMaximumLadenMass>
+    <AirdragModifiedMultistage>true</AirdragModifiedMultistage>
+    <ClassBus>II+III</ClassBus>
+    <NgTankSystem>Compressed</NgTankSystem>
+    <NumberPassengerSeatsLowerDeck>1</NumberPassengerSeatsLowerDeck>
+    <NumberPassengersStandingLowerDeck>10</NumberPassengersStandingLowerDeck>
+    <NumberPassengerSeatsUpperDeck>11</NumberPassengerSeatsUpperDeck>
+    <NumberPassengersStandingUpperDeck>2</NumberPassengersStandingUpperDeck>
+    <BodyworkCode>CB</BodyworkCode>
+    <LowEntry>false</LowEntry>
+    <HeightIntegratedBody>2500</HeightIntegratedBody>
+    <VehicleLength>9500</VehicleLength>
+    <VehicleWidth>2500</VehicleWidth>
+    <EntranceHeight>2000</EntranceHeight>
+    <DoorDriveTechnology>electric</DoorDriveTechnology>
+    <VehicleDeclarationType>final</VehicleDeclarationType>
+    <VehicleTypeApprovalNumber>123456789</VehicleTypeApprovalNumber>
+    <Components xsi:type="Components_Conventional_CompletedBusType">
+      <AirDrag>
+        <v2.0:Data id="CabinX23h" xsi:type="v2.0:AirDragDataDeclarationType">
+          <v2.0:Manufacturer>Generic Manufacturer</v2.0:Manufacturer>
+          <v2.0:Model>Generic Model</v2.0:Model>
+          <v2.0:CertificationNumber>e12*0815/8051*2017/05E0000*00</v2.0:CertificationNumber>
+          <v2.0:Date>2017-03-24T15:00:00Z</v2.0:Date>
+          <v2.0:AppVersion>Vecto AirDrag x.y</v2.0:AppVersion>
+          <v2.0:CdxA_0>6.31</v2.0:CdxA_0>
+          <v2.0:TransferredCdxA>6.32</v2.0:TransferredCdxA>
+          <v2.0:DeclaredCdxA>6.34</v2.0:DeclaredCdxA>
+        </v2.0:Data>
+        <v2.0:Signature>
+          <di:Reference URI="#CabinX23h">
+            <di:Transforms>
+              <di:Transform Algorithm="urn:vecto:xml:2017:canonicalization" />
+              <di:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" />
+            </di:Transforms>
+            <di:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
+            <di:DigestValue>b9SHCfOoVrBxFQ8wwDK32OO+9bd85DuaUdgs6j/29N8=</di:DigestValue>
+          </di:Reference>
+        </v2.0:Signature>
+      </AirDrag>
+      <Auxiliaries>
+        <Data xsi:type="AUX_Conventional_CompletedBusType">
+          <ElectricSystem>
+            <LEDLights>
+              <Interiorlights>false</Interiorlights>
+              <Dayrunninglights>true</Dayrunninglights>
+              <Positionlights>true</Positionlights>
+              <Brakelights>true</Brakelights>
+              <Headlights>false</Headlights>
+            </LEDLights>
+          </ElectricSystem>
+          <HVAC>
+            <SystemConfiguration>6</SystemConfiguration>
+            <HeatPumpTypeDriverCompartment>
+              <Cooling>none</Cooling>
+              <Heating>non R-744 3-stage</Heating>
+            </HeatPumpTypeDriverCompartment>
+            <HeatPumpTypePassengerCompartment>
+              <Cooling>non R-744 2-stage</Cooling>
+              <Heating>non R-744 4-stage</Heating>
+            </HeatPumpTypePassengerCompartment>
+            <AuxiliaryHeaterPower>50</AuxiliaryHeaterPower>
+            <DoubleGlazing>false</DoubleGlazing>
+            <AdjustableAuxiliaryHeater>true</AdjustableAuxiliaryHeater>
+            <SeparateAirDistributionDucts>true</SeparateAirDistributionDucts>
+          </HVAC>
+        </Data>
+      </Auxiliaries>
+    </Components>
+  </v2.0:Vehicle>
+</tns:VectoInputDeclaration>
\ No newline at end of file
diff --git a/VectoCore/VectoCoreTest/VectoCoreTest.csproj b/VectoCore/VectoCoreTest/VectoCoreTest.csproj
index 8461bb5eddacfdfee03420960207b291921c2655..fe4562175674687b28beabafad457174a3104af8 100644
--- a/VectoCore/VectoCoreTest/VectoCoreTest.csproj
+++ b/VectoCore/VectoCoreTest/VectoCoreTest.csproj
@@ -2359,6 +2359,9 @@
     <None Include="TestData\Integration\Buses\SingleBus.vecto">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
+    <None Include="TestData\Integration\Multistage\newVifCompletedConventional-noADAS.vecto">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
     <None Include="TestData\Integration\Multistage\newVifCompletedConventional.vecto">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
@@ -6041,6 +6044,9 @@
     <Content Include="TestData\XML\XMLReaderDeclaration\SchemaVersion2.10\vecto_vehicle-exempted_input_interim-sample.xml">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
+    <Content Include="TestData\XML\XMLReaderDeclaration\SchemaVersion2.10\vecto_vehicle-stage_input_full-sample-final-noADAS.xml">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
     <Content Include="TestData\XML\XMLReaderDeclaration\SchemaVersion2.10\vecto_vehicle-stage_input_full-sample-final.xml">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>