diff --git a/Driver.cpp b/Driver.cpp
index a3b15065..9f54a144 100644
--- a/Driver.cpp
+++ b/Driver.cpp
@@ -3440,30 +3440,35 @@ void TController::SpeedSet()
         break;
     case TEngineType::DieselEngine:
         // Ra 2014-06: "automatyczna" skrzynia biegów...
-        if (!mvControlling->MotorParam[mvControlling->ScndCtrlPos].AutoSwitch) // gdy biegi ręczne
-            if ((mvControlling->ShuntMode ? mvControlling->AnPos : 1.0) * mvControlling->Vel >
-                0.75 * mvControlling->MotorParam[mvControlling->ScndCtrlPos].mfi)
+        if( false == mvControlling->MotorParam[ mvControlling->ScndCtrlPos ].AutoSwitch ) {
+            // gdy biegi ręczne
+            if( ( mvControlling->ShuntMode ? mvControlling->AnPos : 1.0 ) * mvControlling->Vel >
+                0.75 * mvControlling->MotorParam[ mvControlling->ScndCtrlPos ].mfi )
             // if (mvControlling->enrot>0.95*mvControlling->dizel_nMmax) //youBy: jeśli obroty >
             // 0,95 nmax, wrzuć wyższy bieg - Ra: to nie działa
             { // jak prędkość większa niż 0.6 maksymalnej na danym biegu, wrzucić wyższy
-                mvControlling->DecMainCtrl(2);
-                if (mvControlling->IncScndCtrl(1))
-                    if (mvControlling->MotorParam[mvControlling->ScndCtrlPos].mIsat ==
-                        0.0) // jeśli bieg jałowy
-                        mvControlling->IncScndCtrl(1); // to kolejny
+                if( mvControlling->ScndCtrlPos < mvControlling->ScndCtrlPosNo ) {
+                    // ...presuming there is a higher gear
+                    mvControlling->DecMainCtrl( 2 );
+                    if( mvControlling->IncScndCtrl( 1 ) ) {
+                        while( ( mvControlling->MotorParam[ mvControlling->ScndCtrlPos ].mIsat == 0.0 ) // jeśli bieg jałowy
+                            && ( mvControlling->IncScndCtrl( 1 ) ) ) { // to kolejny
+                            ;
+                        }
+                    }
+                }
             }
-            else if ((mvControlling->ShuntMode ? mvControlling->AnPos : 1.0) * mvControlling->Vel <
-                     mvControlling->MotorParam[mvControlling->ScndCtrlPos].fi)
-            { // jak prędkość mniejsza niż minimalna na danym biegu, wrzucić niższy
-                mvControlling->DecMainCtrl(2);
-                mvControlling->DecScndCtrl(1);
-                if (mvControlling->MotorParam[mvControlling->ScndCtrlPos].mIsat ==
-                    0.0) // jeśli bieg jałowy
-                    if (mvControlling->ScndCtrlPos) // a jeszcze zera nie osiągnięto
-                        mvControlling->DecScndCtrl(1); // to kolejny wcześniejszy
+            else if( ( mvControlling->ShuntMode ? mvControlling->AnPos : 1.0 ) * mvControlling->Vel <
+                mvControlling->MotorParam[ mvControlling->ScndCtrlPos ].fi ) { // jak prędkość mniejsza niż minimalna na danym biegu, wrzucić niższy
+                mvControlling->DecMainCtrl( 2 );
+                mvControlling->DecScndCtrl( 1 );
+                if( mvControlling->MotorParam[ mvControlling->ScndCtrlPos ].mIsat == 0.0 ) // jeśli bieg jałowy
+                    if( mvControlling->ScndCtrlPos ) // a jeszcze zera nie osiągnięto
+                        mvControlling->DecScndCtrl( 1 ); // to kolejny wcześniejszy
                     else
-                        mvControlling->IncScndCtrl(1); // a jak zeszło na zero, to powrót
+                        mvControlling->IncScndCtrl( 1 ); // a jak zeszło na zero, to powrót
             }
+        }
         break;
     }
 };
diff --git a/McZapkie/Mover.cpp b/McZapkie/Mover.cpp
index 6b3efdae..6f35b399 100644
--- a/McZapkie/Mover.cpp
+++ b/McZapkie/Mover.cpp
@@ -1572,6 +1572,8 @@ void TMoverParameters::HeatingCheck( double const Timestep ) {
 
                 auto const absrevolutions { std::abs( generator.revolutions ) };
                 generator.voltage = (
+                    false == HeatingAllow ? 0.0 :
+                    // TODO: add support for desired voltage selector
                     absrevolutions < generator.revolutions_min ? generator.voltage_min * absrevolutions / generator.revolutions_min :
 //                    absrevolutions > generator.revolutions_max ? generator.voltage_max * absrevolutions / generator.revolutions_max :
                     interpolate(
diff --git a/Train.cpp b/Train.cpp
index 49bb59c0..08dbf68b 100644
--- a/Train.cpp
+++ b/Train.cpp
@@ -8377,6 +8377,18 @@ bool TTrain::initialize_gauge(cParser &Parser, std::string const &Label, int con
         gauge.AssignDouble(&mvControlled->AnPos);
         m_controlmapper.insert( gauge, "shuntmodepower:" );
     }
+    else if( Label == "heatingvoltage:" ) {
+        if( mvControlled->HeatingPowerSource.SourceType == TPowerSource::Generator ) {
+            auto &gauge = Cabine[ Cabindex ].Gauge( -1 ); // pierwsza wolna gałka
+            gauge.Load( Parser, DynamicObject );
+            gauge.AssignDouble( &(mvControlled->HeatingPowerSource.EngineGenerator.voltage) );
+        }
+    }
+    else if( Label == "heatingcurrent:" ) {
+        auto &gauge = Cabine[ Cabindex ].Gauge( -1 ); // pierwsza wolna gałka
+        gauge.Load( Parser, DynamicObject );
+        gauge.AssignDouble( &( mvControlled->TotalCurrent ) );
+    }
     else
     {
         // failed to match the label
diff --git a/driveruipanels.cpp b/driveruipanels.cpp
index 9047f561..4845d6d6 100644
--- a/driveruipanels.cpp
+++ b/driveruipanels.cpp
@@ -750,17 +750,14 @@ debug_panel::update_vehicle_brake() const {
 
 void
 debug_panel::update_section_engine( std::vector<text_line> &Output ) {
-
-    if( m_input.train == nullptr ) { return; }
+    // engine data
     if( m_input.vehicle == nullptr ) { return; }
     if( m_input.mover == nullptr ) { return; }
 
-    auto const &train { *m_input.train };
     auto const &vehicle{ *m_input.vehicle };
     auto const &mover{ *m_input.mover };
 
-        // engine data
-                // induction motor data
+    // induction motor data
     if( mover.EngineType == TEngineType::ElectricInductionMotor ) {
 
         Output.emplace_back( "      eimc:            eimv:            press:", Global.UITextColor );
@@ -772,7 +769,11 @@ debug_panel::update_section_engine( std::vector<text_line> &Output ) {
                 + mover.eimv_labels[ i ] + to_string( mover.eimv[ i ], 2, 9 );
 
             if( i < 10 ) {
-                parameters += " | " + train.fPress_labels[ i ] + to_string( train.fPress[ i ][ 0 ], 2, 9 );
+                // NOTE: we pull consist data from the train structure, so show this data only if we're viewing controlled vehicle
+                parameters +=
+                    ( ( m_input.train != nullptr ) && ( m_input.train->Dynamic() == m_input.vehicle ) ?
+                        " | " + TTrain::fPress_labels[ i ] + to_string( m_input.train->fPress[ i ][ 0 ], 2, 9 ) :
+                        "" );
             }
             else if( i == 12 ) {
                 parameters += "        med:";
@@ -784,6 +785,7 @@ debug_panel::update_section_engine( std::vector<text_line> &Output ) {
             Output.emplace_back( parameters, Global.UITextColor );
         }
     }
+    // diesel engine data
     if( mover.EngineType == TEngineType::DieselEngine ) {
 
         std::string parameterstext = "param       value";
diff --git a/version.h b/version.h
index 67a81d3e..9f573cd6 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #pragma once
 
 #define VERSION_MAJOR 19
-#define VERSION_MINOR 701
+#define VERSION_MINOR 712
 #define VERSION_REVISION 0