diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index 3284e15..6c360af 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -149,7 +149,7 @@ final class BackendController extends Controller
         $view = new View($this->app->l11nManager, $request, $response);
 
         $view->setTemplate('/Modules/FleetManagement/Theme/Backend/driver-list');
-        $view->data['nav'] = $this->app->moduleManager->get('Navigation')->createNavigationMid(1003502001, $request, $response);
+        $view->data['nav'] = $this->app->moduleManager->get('Navigation')->createNavigationMid(1003503001, $request, $response);
 
         $list = DriverMapper::getAll()
             ->with('account')
@@ -360,7 +360,7 @@ final class BackendController extends Controller
         $view = new View($this->app->l11nManager, $request, $response);
 
         $view->setTemplate('/Modules/FleetManagement/Theme/Backend/driver-view');
-        $view->data['nav'] = $this->app->moduleManager->get('Navigation')->createNavigationMid(1003502001, $request, $response);
+        $view->data['nav'] = $this->app->moduleManager->get('Navigation')->createNavigationMid(1003503001, $request, $response);
 
         $view->data['attributeView']                               = new \Modules\Attribute\Theme\Backend\Components\AttributeView($this->app->l11nManager, $request, $response);
         $view->data['attributeView']->data['default_localization'] = $this->app->l11nServer;
@@ -505,7 +505,7 @@ final class BackendController extends Controller
         $view = new View($this->app->l11nManager, $request, $response);
 
         $view->setTemplate('/Modules/FleetManagement/Theme/Backend/driver-view');
-        $view->data['nav'] = $this->app->moduleManager->get('Navigation')->createNavigationMid(1003502001, $request, $response);
+        $view->data['nav'] = $this->app->moduleManager->get('Navigation')->createNavigationMid(1003503001, $request, $response);
 
         // @todo This language filtering doesn't work. But it was working with the old mappers. Maybe there is a bug in the where() definition. Need to inspect the actual query.
         $driver = DriverMapper::get()
diff --git a/Models/Driver/Driver.php b/Models/Driver/Driver.php
index 71aeca9..60c5a41 100644
--- a/Models/Driver/Driver.php
+++ b/Models/Driver/Driver.php
@@ -15,6 +15,7 @@ declare(strict_types=1);
 namespace Modules\FleetManagement\Models\Driver;
 
 use Modules\Admin\Models\Account;
+use Modules\Admin\Models\NullAccount;
 
 /**
  * Driver class.
@@ -54,6 +55,11 @@ class Driver
 
     public array $inspections = [];
 
+    public function __construct()
+    {
+        $this->account = new NullAccount();
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/Models/Driver/NullDriver.php b/Models/Driver/NullDriver.php
index 6d2427c..ca23aca 100644
--- a/Models/Driver/NullDriver.php
+++ b/Models/Driver/NullDriver.php
@@ -34,6 +34,7 @@ final class NullDriver extends Driver
     public function __construct(int $id = 0)
     {
         $this->id = $id;
+        parent::__construct();
     }
 
     /**
diff --git a/Theme/Backend/Lang/de.lang.php b/Theme/Backend/Lang/de.lang.php
index b746585..9ea4a3d 100755
--- a/Theme/Backend/Lang/de.lang.php
+++ b/Theme/Backend/Lang/de.lang.php
@@ -40,6 +40,7 @@ return ['FleetManagement' => [
     'Responsible'   => 'Verantwortlich',
     'Start'         => 'Start',
     'Status'        => 'Status',
+    'VIN'        => 'VIN',
     'Type'          => 'Typ',
     'Upcoming'      => 'Upcoming',
     'Vehicles'      => 'Fahrzeuge',
diff --git a/Theme/Backend/Lang/en.lang.php b/Theme/Backend/Lang/en.lang.php
index 0896c18..77623dc 100755
--- a/Theme/Backend/Lang/en.lang.php
+++ b/Theme/Backend/Lang/en.lang.php
@@ -40,6 +40,7 @@ return ['FleetManagement' => [
     'Responsible'   => 'Responsible',
     'Start'         => 'Start',
     'Status'        => 'Status',
+    'VIN'        => 'VIN',
     'Type'          => 'Type',
     'Upcoming'      => 'Upcoming',
     'Vehicles'      => 'Vehicles',
diff --git a/Theme/Backend/driver-view.tpl.php b/Theme/Backend/driver-view.tpl.php
index a1ce416..c433b10 100644
--- a/Theme/Backend/driver-view.tpl.php
+++ b/Theme/Backend/driver-view.tpl.php
@@ -133,7 +133,7 @@ echo $this->data['nav']->render();
                                     <td class="wf-100"><?= $this->getHtml('Type'); ?>
                                     <td><?= $this->getHtml('Responsible'); ?>
                             <tbody>
-                            <?php foreach ($this->data['inspections'] as $inspection) :
+                            <?php foreach (($this->data['inspections'] ?? []) as $inspection) :
                                 // @todo handle old inspections in the past? maybe use a status?!
                                 if ($inspection->next === null) {
                                     continue;
@@ -158,7 +158,7 @@ echo $this->data['nav']->render();
                                     <td class="wf-100"><?= $this->getHtml('Type'); ?>
                                     <td><?= $this->getHtml('Responsible'); ?>
                             <tbody>
-                            <?php foreach ($this->data['inspections'] as $inspection) : ?>
+                            <?php foreach (($this->data['inspections'] ?? []) as $inspection) : ?>
                                 <tr>
                                     <td><?= $inspection->date->format('Y-m-d H:i'); ?>
                                     <td><?= $this->printHtml($inspection->type->getL11n()); ?>
diff --git a/Theme/Backend/vehicle-view.tpl.php b/Theme/Backend/vehicle-view.tpl.php
index a1b43ce..1926fea 100644
--- a/Theme/Backend/vehicle-view.tpl.php
+++ b/Theme/Backend/vehicle-view.tpl.php
@@ -60,7 +60,7 @@ echo $this->data['nav']->render();
 
                             <div class="form-group">
                                 <label for="iVehicleDriver"><?= $this->getHtml('Driver'); ?></label>
-                                <input type="text" id="iVehicleDriver" name="driver" value="" disabled>
+                                <input type="text" id="iVehicleDriver" name="driver" value="">
                             </div>
 
                             <div class="form-group">
@@ -108,12 +108,12 @@ echo $this->data['nav']->render();
 
                             <div class="form-group">
                                 <label for="iVehiclePrice"><?= $this->getHtml('PurchasePrice'); ?></label>
-                                <input type="number" step="0.01" id="iVehiclePrice" name="purchase_price" value="<?= $this->printHtml($vehicle->getAttribute('purchase_price')->value->getValue()); ?>">
+                                <input type="number" step="any" id="iVehiclePrice" name="purchase_price" value="<?= $this->printHtml($vehicle->getAttribute('purchase_price')->value->getValue()); ?>">
                             </div>
 
                             <div class="form-group">
                                 <label for="iVehiclePrice"><?= $this->getHtml('LeasingFee'); ?></label>
-                                <input type="number" step="0.01" id="iVehiclePrice" name="leasing_fee" value="<?= $this->printHtml($vehicle->getAttribute('leasing_fee')->value->getValue()); ?>">
+                                <input type="number" step="any" id="iVehiclePrice" name="leasing_fee" value="<?= $this->printHtml($vehicle->getAttribute('leasing_fee')->value->getValue()); ?>">
                             </div>
                         </div>
                         <div class="portlet-foot">
@@ -180,7 +180,7 @@ echo $this->data['nav']->render();
                             <tbody>
                             <?php
                             $count = 0;
-                            foreach ($this->data['inspections'] as $inspection) :
+                            foreach (($this->data['inspections'] ?? []) as $inspection) :
                                 // @todo handle old inspections in the past? maybe use a status?!
                                 if ($inspection->next === null) {
                                     continue;
@@ -212,7 +212,7 @@ echo $this->data['nav']->render();
                             <tbody>
                             <?php
                             $count = 0;
-                            foreach ($this->data['inspections'] as $inspection) :
+                            foreach (($this->data['inspections'] ?? []) as $inspection) :
                                 ++$count;
                             ?>
                                 <tr>