diff --git a/VECTOAux/VectoAuxiliariesTests/IntegrationTests/AuxDemandTest.vb b/VECTOAux/VectoAuxiliariesTests/IntegrationTests/AuxDemandTest.vb
index 05de179604b4cb0e122f3ff5c4b555e4e400e5e5..ed079df9a565dc1a50cbf9fe6156e95d242ef7f0 100644
--- a/VECTOAux/VectoAuxiliariesTests/IntegrationTests/AuxDemandTest.vb
+++ b/VECTOAux/VectoAuxiliariesTests/IntegrationTests/AuxDemandTest.vb
@@ -113,7 +113,7 @@ Namespace IntegrationTests
             For i As Integer = 0 To 9
                 aux.ResetCalculations()
                 Assert.AreEqual(6087.0317, aux.AuxiliaryPowerAtCrankWatts().Value(), 0.001)
-                aux.CycleStep(1.SI(Of Second), 1.0)
+                aux.CycleStep(1.SI(Of Second))
                 'Console.WriteLine("{0}", aux.AA_TotalCycleFC_Grams)
             Next
 
@@ -128,7 +128,7 @@ Namespace IntegrationTests
             For i As Integer = 0 To 9
                 aux.ResetCalculations()
                 Assert.AreEqual(8954.1435, aux.AuxiliaryPowerAtCrankWatts().Value(), 0.001)
-                aux.CycleStep(1.SI(Of Second), 1.0)
+                aux.CycleStep(1.SI(Of Second))
                 'Console.WriteLine("{0}", aux.AA_TotalCycleFC_Grams)
             Next
 
@@ -143,7 +143,7 @@ Namespace IntegrationTests
             For i As Integer = 0 To 9
                 aux.ResetCalculations()
                 Assert.AreEqual(6087.0317, aux.AuxiliaryPowerAtCrankWatts().Value(), 0.001)
-                aux.CycleStep(1.SI(Of Second), 1.0)
+                aux.CycleStep(1.SI(Of Second))
                 'Console.WriteLine("{0}", aux.AA_TotalCycleFC_Grams)
             Next
 
diff --git a/VectoCore/VectoCore/Models/BusAuxiliaries/BusAuxiliaries.cs b/VectoCore/VectoCore/Models/BusAuxiliaries/BusAuxiliaries.cs
index 9a10e768bfe0a741da1b1d0f64122a31e8dbab73..5464820523b5acb4e5e6828fc13e66d02596fc8d 100644
--- a/VectoCore/VectoCore/Models/BusAuxiliaries/BusAuxiliaries.cs
+++ b/VectoCore/VectoCore/Models/BusAuxiliaries/BusAuxiliaries.cs
@@ -349,7 +349,7 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries
 		
 
 
-        public virtual void CycleStep(Second seconds, double essFactor)
+        public virtual void CycleStep(Second seconds)
         {
             try {
                 //M9.CycleStep(seconds);
diff --git a/VectoCore/VectoCore/Models/BusAuxiliaries/Interfaces/IBusAuxiliaries.cs b/VectoCore/VectoCore/Models/BusAuxiliaries/Interfaces/IBusAuxiliaries.cs
index 380797ff95bafe72f5216ac04bbe8abfb804f68a..92ba48b352ed929c869296745660de18b897c4ee 100644
--- a/VectoCore/VectoCore/Models/BusAuxiliaries/Interfaces/IBusAuxiliaries.cs
+++ b/VectoCore/VectoCore/Models/BusAuxiliaries/Interfaces/IBusAuxiliaries.cs
@@ -134,10 +134,9 @@ namespace TUGraz.VectoCore.Models.BusAuxiliaries.Interfaces
 		/// Cycle Step - Used to calculate fuelling
 		/// </summary>
 		/// <param name="seconds"></param>
-		/// <param name="essFactor"></param>
 		/// <returns></returns>
 		/// <remarks></remarks>
-		void CycleStep(Second seconds, double essFactor);
+		void CycleStep(Second seconds);
 
         ///// <summary>
         ///// Initialises AAUX Environment ( Begin Processs )
diff --git a/VectoCore/VectoCore/Models/SimulationComponent/Impl/BusAuxiliariesAdapter.cs b/VectoCore/VectoCore/Models/SimulationComponent/Impl/BusAuxiliariesAdapter.cs
index ed2d5bed7e495e86f31333f383fe463701fcb58f..9f96c6524e684c9a3b4ec5ab29f291ffe24f92ce 100644
--- a/VectoCore/VectoCore/Models/SimulationComponent/Impl/BusAuxiliariesAdapter.cs
+++ b/VectoCore/VectoCore/Models/SimulationComponent/Impl/BusAuxiliariesAdapter.cs
@@ -52,7 +52,6 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 
 		protected IBusAuxiliaries Auxiliaries;
 
-		private double EngineStopStartUtilityFactor;
 		private bool SmartElectricSystem;
 		private IAuxiliaryConfig AuxCfg;
 
@@ -62,7 +61,6 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 			IVehicleContainer container, IAuxiliaryConfig auxiliaryConfig, IAuxPort additionalAux = null) : base(container)
 		{
 			container.AddComponent(this);
-			EngineStopStartUtilityFactor = 1; // container.RunData?.DriverData?.EngineStopStart?.UtilityFactorStandstill ?? double.NaN;
 
 			CurrentState = new BusAuxState();
 			PreviousState = new BusAuxState { AngularSpeed = container.EngineInfo.EngineIdleSpeed };
@@ -216,8 +214,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 				absTime, dt, 0.SI<NewtonMeter>(), DataBus.EngineInfo.EngineIdleSpeed, true) - Auxiliaries.ElectricPowerDemandMech;
             //AdditionalAux = conventionalAux;
 
-            CurrentState.PowerDemand = ((AdditionalAux?.PowerDemandESSEngineOn(absTime, dt, DataBus.EngineInfo.EngineIdleSpeed) ?? 0.SI<Watt>()) +
-                                        busAuxPowerDemand) * (1 - EngineStopStartUtilityFactor);
+            CurrentState.PowerDemand = 0.SI<Watt>();
             //CurrentState.ESPowerGeneratedICE_On = Auxiliaries.ElectricPowerGenerated;
             //CurrentState.ESPowerMech = Auxiliaries.ElectricPowerDemandMech;
             // 
@@ -227,7 +224,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
             //	absTime, dt, 0.SI<NewtonMeter>(), DataBus.EngineInfo.EngineIdleSpeed);
             //AdditionalAux = conventionalAux;
 
-            return EngineStopStartUtilityFactor * (busAuxPowerDemand - Auxiliaries.PSPowerDemandAirGenerated + (AdditionalAux?.PowerDemandESSEngineOff(absTime, dt) ?? 0.SI<Watt>()));
+            return (busAuxPowerDemand - Auxiliaries.PSPowerDemandAirGenerated + (AdditionalAux?.PowerDemandESSEngineOff(absTime, dt) ?? 0.SI<Watt>()));
 		}
 
 
@@ -238,7 +235,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 
 			var essUtilityFactor = 1.0;
 			if (!DataBus.EngineCtl.CombustionEngineOn) {
-				essUtilityFactor = 1 - EngineStopStartUtilityFactor;
+				essUtilityFactor = 0.0;
 			}
 
             var signals = Auxiliaries.Signals;
@@ -248,7 +245,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 
             // cycleStep has to be called here and not in DoCommit, write is called before Commit!
             //var oldSOC = Auxiliaries.BatterySOC;
-            Auxiliaries.CycleStep(CurrentState.dt, DataBus.EngineCtl.CombustionEngineOn ? 1.0 : EngineStopStartUtilityFactor);
+            Auxiliaries.CycleStep(CurrentState.dt);
 			//var newSOC = Auxiliaries.BatterySOC;
 
 			//CurrentState.TotalFuelConsumption = Auxiliaries.TotalFuel;
@@ -356,7 +353,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 			var maxChg = ElectricStorage.MaxChargeEnergy();
 			var maxDischg = ElectricStorage.MaxDischargeEnergy();
 			
-			var essFactor = DataBus.EngineCtl.CombustionEngineOn ? 0.0 : EngineStopStartUtilityFactor;
+			var essFactor = DataBus.EngineCtl.CombustionEngineOn ? 0.0 : 1.0;
 			var elPwrGen = Auxiliaries.ElectricPowerGenerated;
 			var elPwrConsumed = Auxiliaries.ElectricPowerConsumerSum;
 
diff --git a/VectoCore/VectoCore/Models/SimulationComponent/Impl/StopStartCombustionEngine.cs b/VectoCore/VectoCore/Models/SimulationComponent/Impl/StopStartCombustionEngine.cs
index 662712a887f29562e50f6022bfa51100ae871a5a..566229bf382b678d3536a78c4dfd8d52c20f27ac 100644
--- a/VectoCore/VectoCore/Models/SimulationComponent/Impl/StopStartCombustionEngine.cs
+++ b/VectoCore/VectoCore/Models/SimulationComponent/Impl/StopStartCombustionEngine.cs
@@ -13,7 +13,6 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 {
 	public class StopStartCombustionEngine : CombustionEngine
 	{
-		protected double EngineStopStartUtilityFactor;
 		private WattSecond EngineStartEnergy;
 
 		public StopStartCombustionEngine(
@@ -21,13 +20,12 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 			container, modelData, pt1Disabled)
 		{
 			CombustionEngineOn = true;
-			EngineStopStartUtilityFactor = 1; // container.RunData.DriverData.EngineStopStart.UtilityFactorStandstill;
 
 			var engineRampUpEnergy = Formulas.InertiaPower(modelData.IdleSpeed, 0.RPMtoRad(), modelData.Inertia, modelData.EngineStartTime) * modelData.EngineStartTime;
 			var engineDragEnergy = VectoMath.Abs(modelData.FullLoadCurves[0].DragLoadStationaryTorque(modelData.IdleSpeed)) *
 									modelData.IdleSpeed / 2.0 * modelData.EngineStartTime;
 
-			EngineStartEnergy = (engineRampUpEnergy + engineDragEnergy) * EngineStopStartUtilityFactor / DeclarationData.AlternaterEfficiency / DeclarationData.AlternaterEfficiency;
+			EngineStartEnergy = (engineRampUpEnergy + engineDragEnergy) / DeclarationData.AlternaterEfficiency / DeclarationData.AlternaterEfficiency;
 		}
 
 		public override bool CombustionEngineOn { get; set; }
@@ -151,7 +149,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 						avgRampUpSpeed * 0.5.SI<Second>();
 
 					container[ModalResultField.P_ice_start] =
-						(EngineStartEnergy + (engineRampUpEnergy + engineDragEnergy) * EngineStopStartUtilityFactor) /
+						(EngineStartEnergy + (engineRampUpEnergy + engineDragEnergy)) /
 						CurrentState.dt;
 				} else {
 					container[ModalResultField.P_ice_start] = 0.SI<Watt>();
@@ -207,10 +205,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 					//fcAAUX = advancedAux.AAuxFuelConsumption;
 				}
 
-
-				var result = fuel.ConsumptionMap.GetFuelConsumption(auxDemandTq, ModelData.IdleSpeed);
-
-				var fcESS = result.Value * (1 - EngineStopStartUtilityFactor) * fuel.FuelData.HeatingValueCorrection * WHTCCorrectionFactor(fuel.FuelData);
+				var fcESS = fcWHTC;
 				var fcFinal = fcESS;
 
 				container[ModalResultField.FCMap, fuel.FuelData] = fc;
@@ -224,18 +219,11 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 
 		protected virtual void WriteWHRPowerEngineOff(IModalDataContainer container, PerSecond engineSpeed, NewtonMeter engineTorque)
 		{
-			var pWHRelMap = 0.SI<Watt>();
-			var pWHRelCorr = 0.SI<Watt>();
-			var pWHRmechMap = 0.SI<Watt>();
-			var pWHRmechCorr = 0.SI<Watt>();
-			GetWHRPower(ModelData.ElectricalWHR, engineSpeed, engineTorque, ref pWHRelMap, ref pWHRelCorr);
-			GetWHRPower(ModelData.MechanicalWHR, engineSpeed, engineTorque, ref pWHRmechMap, ref pWHRmechCorr);
-
-			container[ModalResultField.P_WHR_el_map] = (1 - EngineStopStartUtilityFactor) * pWHRelMap;
-			container[ModalResultField.P_WHR_el_corr] = (1 - EngineStopStartUtilityFactor) * pWHRelCorr;
-
-			container[ModalResultField.P_WHR_mech_map] = (1 - EngineStopStartUtilityFactor) * pWHRmechMap;
-			container[ModalResultField.P_WHR_mech_corr] = (1 - EngineStopStartUtilityFactor) * pWHRmechCorr;
+			container[ModalResultField.P_WHR_el_map] = 0.SI<Watt>();
+			container[ModalResultField.P_WHR_el_corr] = 0.SI<Watt>();
+
+			container[ModalResultField.P_WHR_mech_map] = 0.SI<Watt>();
+			container[ModalResultField.P_WHR_mech_corr] = 0.SI<Watt>();
 		}
 	}