Volkswagen ID.7

Dr VW ID.7 ist ein batterieelektrisches Fahrzeug (BEV) mit semipermanenter Anbindung an die Server von Volkswagen connect.

Anbindung via MQTT

Mit einem relativ kompakten Code von Till Steinbach kann man die Fahrzeugdaten von VW connect abfragen und als MQTT-Nachricht an FHEM senden.

Python-Server

Zur Installation sei auf die Anleitung von Till Steinbach verwiesen, sie den obigen Link. In Kürze:

• Python 3.8 muss installiert sein
• weconnect-mqtt installieren mit

pip3 install weconnect-mqtt

• Zum Ausprobieren den Server starten über die Kommandozeile

/usr/bin/python3 -m weconnect_mqtt --username <username> --password <passwort> --mqttbroker <IP-Adresse des FHEM MQTT-Servers> --prefix weconnect --pictures --picture-format png --convert-times Europe/Berlin --no-capabilities

Damit das Programm beim Neustart des Betriebssystems ebenfalls startet, muss es als Service registriert werden. Dazu bitte eine Datei /etc/systemd/system/weconnect-mqtt.service anlegen mit dem Inhalt

[Unit]
Description=WeConnect-mqtt
After=network-online.target

[Service]
Type=simple
# change the username and commandline parameters here:
User=fhem
ExecStart=/usr/bin/python3 -m weconnect_mqtt --username <username> --password <passwort> --mqttbroker <IP-Adresse des FHEM MQTT-Servers> --prefix weconnect --pictures --picture-format png --convert-times Europe/Berlin --no-capabilities

[Install]
WantedBy=multi-user.target

Diesen Service mit

systemctl start weconnect-mqtt

manuell starten bzw. mit

systemctl enable weconnect-mqtt

den automatischen Start beim Systemstart einrichten.

FHEM-Device

Der ID7 ist ziemlich gesprächig, man muss sich daher genau überlegen, welche Daten man wirklich benötigt. Zum Ausprobieren folgender Vorschlag

Code:

defmod ID7 MQTT2_DEVICE MQTTBridge
attr ID7 autocreate 0
attr ID7 babbleName ID7
attr ID7 devStateIcon charging_car.*:ev_car@darkorange finished_car.*:ev_car@green .*_car:ev_car@black
attr ID7 devicetopic weconnect
attr ID7 group energyControl
attr ID7 readingList MQTTBridge:weconnect/mqtt/weconnectConnected:.* connected\
MQTTBridge:weconnect/mqtt/weconnectUpdated:.* connection_updated\
MQTTBridge:weconnect/mqtt/weconnectUpdateInterval_s:.* interval\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/readiness/readinessStatus/connectionState/isOnline:.* isOnline\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/readiness/readinessStatus/connectionState/isActive:.* connection_isActive\
MQTTBridge:weconnect/mqtt/error/code:.* mqtt_error_code\
MQTTBridge:weconnect/mqtt/error/message:.* mqtt_error_message\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/controls/wakeup:.* wakeup\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/.*pictures:.* { json2nameValue($EVENT, '', $JSONMAP) }\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisation:.* { json2nameValue($EVENT, '', $JSONMAP) }\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/maxChargeCurrentAC:.* charge_current\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/overallStatus:.* door_security\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/doorLockStatus:.* door_lock_status\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/doors/frontLeft/lockState:.* door_FL_ls\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/doors/frontLeft/openState:.* door_FL\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/windows/frontRight/openState:.* door_FR\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/doors/frontRight/lockState:.* door_FR_ls\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/doors/rearRight/lockState:.* door_RR_ls\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/doors/rearLeft/lockState:.* door_RL_ls\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/doors/trunk/lockState:.* trunk_ls\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/doors/trunk/openState:.* trunk\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/windows/frontLeft/openState:.* window_FL\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/windows/frontRight/openState:.* window_FR\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/windows/rearLeft/openState:.* window_RL\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/access/accessStatus/windows/rearRight/openState:.* window_RR\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/parking/parkingPosition/latitude:.* parking_latitude\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/parking/parkingPosition/longitude:.* parking_longitude\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/batteryStatus/currentSOC_pct:.* SOC\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/measurements/fuelLevelStatus/currentSOC_pct:.* SOC\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/fuelStatus/rangeStatus/primaryEngine/currentSOC_pct:.* SOC\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/targetSOC_pct:.* SOC_target\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/automation/chargingProfiles/nextChargingTimer/targetSOCreachable:.* SOC_reachable\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/chargingProfiles/chargingProfilesStatus/nextChargingTimer/targetSOCreachable:.* SOC_reachable\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/measurements/temperatureBatteryStatus/temperatureHvBatteryMin_K:.* battery_tempMin\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/measurements/temperatureBatteryStatus/temperatureHvBatteryMax_K:.* battery_tempMax\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/batteryChargingCare/chargingCareSettings/batteryCareMode:.* battery_careMode\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/batterySupport/batterySupportStatus/batterySupport:.* battery_Support\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/batterySupport/batterySupportStatus/error/message:.* batttery_error_message\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/batterySupport/batterySupportStatus/error:.* batttery_error\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/request:.* charge_request\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/automation/chargingProfiles/profiles/1/maxChargingCurrent:.* charge_current\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/autoUnlockPlugWhenCharged:.* charge_autoUnlock\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/autoUnlockPlugWhenChargedAC:.* charge_AC_autoUnlock\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingStatus/chargeMode:.* charge_mode\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingStatus/chargePower_kW:.* charge_power\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingStatus/chargeRate_kmph:.* charge_rate\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingStatus/chargeType:.* charge_type\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingStatus/chargingSettings:.* charge_settings\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingStatus/chargingState:.* charge_state\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingStatus/remainingChargingTimeToComplete_min:.* charge_timeremain\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/plugStatus/externalPower:.* charge_plugpower\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/plugStatus/ledColor:.* charge_plugcolor\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/plugStatus/plugConnectionState:.* charge_plugstate\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/plugStatus/plugLockState:.* charge_plugls\
\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/measurements/rangeStatus/totalRange_km:.* range\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/measurements/rangeStatus/electricRange:.* range\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/batteryStatus/cruisingRangeElectric_km:.* range\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/fuelStatus/rangeStatus/primaryEngine/remainingRange_km:.* range\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/fuelStatus/rangeStatus/totalRange_km:.* range\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/measurements/odometerStatus/odometer:.* odometer\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/vehicleHealth.*/mileage_km:.* odometer\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/automation/climatisationTimer/timers/1/enabled:.* timers_1_enabled\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/automation/climatisationTimer/timers/2/enabled:.* timers_2_enabled\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/automation/chargingProfiles/profiles/1/preferredChargingTimes/None/id:.* chargeTimer_id\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/automation/chargingProfiles/profiles/1/preferredChargingTimes/4/enabled:.* chargeTimer_4_enabled\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/automation/chargingProfiles/profiles/1/preferredChargingTimes/4/startTime:.* chargeTimer_4_startTime\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/automation/chargingProfiles/profiles/1/preferredChargingTimes/4/endTime:.* chargeTimer_4_endTime\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/chargingProfiles/chargingProfilesStatus/profiles/1/preferredChargingTimes/None/id:.* chargeTimer_id\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/chargingProfiles/chargingProfilesStatus/profiles/1/preferredChargingTimes/4/enabled:.* chargeTimer_4_enabled\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/chargingProfiles/chargingProfilesStatus/profiles/1/preferredChargingTimes/4/startTime:.* chargeTimer_4_startTime\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/chargingProfiles/chargingProfilesStatus/profiles/1/preferredChargingTimes/4/endTime:.* chargeTimer_4_endTime\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisation/climatisationStatus/climatisationState:.* clima_state\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisation/windowHeatingStatus/windows/front/windowHeatingState:.* clima_window_F\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisation/windowHeatingStatus/windows/rear/windowHeatingState:.* clima_window_R\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisation/climatisationSettings/climatizationAtUnlock:.* clima_atUnlock\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisation/climatisationSettings/targetTemperature_C:.* clima_temperature\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisationTimers/climatisationTimersStatus/timers/1/enabled:.* timers_1_enabled\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisationTimers/climatisationTimersStatus/timers/2/enabled:.* timers_2_enabled\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/automation/chargingProfiles/profiles/1/preferredChargingTimes/4/id:.* chargeTimer_4_id\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/chargingProfiles/chargingProfilesStatus/profiles/1/preferredChargingTimes/4/id:.* chargeTimer_4_id\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/automation/chargingProfiles/profiles/1/preferredChargingTimes/4:.* chargeTimer_4\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/chargingProfiles/chargingProfilesStatus/profiles/1/preferredChargingTimes/4:.* chargeTimer_4\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/automation/chargingProfiles/nextChargingTimer:.* chargeTimer_next\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/chargingProfiles/chargingProfilesStatus/nextChargingTimer:.* chargeTimer_next\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/coUsers/0:.* coUsers_0\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/coUsers/0/id:.* coUsers_0_id\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/coUsers/0/role:.* coUsers_0_role\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/coUsers/0/roleReseted:.* coUsers_0_roleReseted\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/coUsers/0/enrollmentStatus:.* coUsers_0_enrollmentStatus\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/.*/webApp/status:.* status_app\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/.*/predictiveWakeUp/status:.* status_wakeup\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/.*/roadExperienceManagementLocalization/status:.* status_roadex\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/vehicleHealthInspection/maintenanceStatus/inspectionDue_days:.* maintenance_due\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/vehicleHealthInspection/maintenanceStatus/error/message:.* maintenance_eror_message\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/vehicleHealthInspection/maintenanceStatus/error:.* maintenanance_error\
\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/request/6e1647f9-a0aa-4896-80bf-b9ec44c89e6a/status:.* 6e1647f9_status\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/request/6e1647f9-a0aa-4896-80bf-b9ec44c89e6a/operation:.* 6e1647f9_operation\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/request/6e1647f9-a0aa-4896-80bf-b9ec44c89e6a/body:.* 6e1647f9_body\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/request/6e1647f9-a0aa-4896-80bf-b9ec44c89e6a/requestId:.* 6e1647f9_charge_requestId\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/request/6e1647f9-a0aa-4896-80bf-b9ec44c89e6a/vcfRequestId:.* 6e1647f9_charge_vcfRequestId\
MQTTBridge:weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/request/6e1647f9-a0aa-4896-80bf-b9ec44c89e6a:.* 6e1647f9_else\
\

attr ID7 setList update:noArg weconnect/mqtt/weconnectForceUpdate_writetopic True\
interval:60,300 weconnect/mqtt/weconnectUpdateInterval_s_writetopic\
battery_careMode:activated,deactivated weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/batteryChargingCare/chargingCareSettings/batteryCareMode_writetopic\
clima:start,stop,on,off weconnect/vehicles/WVWxxxxxxxxxxxxxxx/controls/climatisation_writetopic\
clima_atUnlock:True,False weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisation/climatisationSettings/climatizationAtUnlock_writetopic\
clima_temperature:slider,20,1,25 weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisation/climatisationSettings/targetTemperature_C_writetopic\
clima_windowheat:True,False weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisation/climatisationSettings/windowHeatingEnabled_writetopic\
clima_frontleft:True,False weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisation/climatisationSettings/zoneFrontLeftEnabled_writetopic\
clima_frontright:True,False weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/climatisation/climatisationSettings/zoneFrontRightEnabled_writetopic\
SOC_target:slider,50,10,100 weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/targetSOC_pct_writetopic\
charge_current:maximum,reduced weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/maxChargeCurrentAC_writetopic\
charge_autoUnlock:on,off weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/autoUnlockPlugWhenCharged_writetopic\
charge_AC_autoUnlock:on,off weconnect/vehicles/WVWxxxxxxxxxxxxxxx/domains/charging/chargingSettings/autoUnlockPlugWhenChargedAC_writetopic\

attr ID7 sortby 2
attr ID7 stateFormat {my $soc=ReadingsVal("ID7","SOC",0);;\
  my $ran=ReadingsVal("ID7","range",0);;\
  my $cst=ReadingsVal("ID7","charge_state","");;\
  my $ret;;\
  if( $cst eq "charging"){\
    $ret=sprintf("<p align=\"left\">\n%s_car\n<br/>%d %% (%d km)",$cst,$soc,$ran);;\
    my $cp=ReadingsVal("ID7","charge_power",0);;\
    my $tr=ReadingsVal("ID7","charge_timeremain",0);;\
    $ret.=sprintf("\n<br>charging %.1f kW, %d min",$cp,$tr)\
  }elsif( $cst eq "notReadyForCharging" ){\
   $ret=sprintf("<p align=\"left\">\n%s_car\n<br/>%d %% (%d km)",$cst,$soc,$ran);;\
  }elsif( $cst eq "chargePurposeReachedAndNotConservationCharging"){\
    $ret=sprintf("<p align=\"left\">\nfinished_car\n<br/>%d %% (%d km)",$soc,$ran);;\
    my $ce=ReadingsVal("Wally","energy_today",0);;\
    $ret.=sprintf("\n<br>acquired %.1f kWh",$ce)\
  }\
  $ret.="\n</p>";;\
  return $ret;;\
}
attr ID7 userReadings message:SOC.* {my $soc=ReadingsVal("ID7","SOC",0);;\
  my $ran=ReadingsVal("ID7","range",0);;\
  my $cst=ReadingsVal("ID7","charge_state","");;\
  my $ret=sprintf("Der ID7 hat %d %% Batterieladung, das reicht für %d Kilometer",$soc,$ran);;\
  if( $cst eq "charging"){\
    my $cp=ReadingsVal("ID7","charge_power",0);;\
    my $tr=ReadingsVal("ID7","charge_timeremain",0);;\
    $ret.=sprintf(", geladen wird noch %d Minuten mit %.1f Kilowatt.",$tr,$cp)\
  }\
  return $ret;;\
},\
parking_location:parking_latitude.* {my $lat=ReadingsVal("ID7","parking_latitude",0);;\
  my $lon=ReadingsVal("ID7","parking_longitude",0);;\
  return ((sqrt(($lon-0.00)**2+($lat-0.00)**2)<=0.01)?"Home":"unknown")\
}

Offene Fragen

• Eine Schwierigkeit besteht darin, dass die Daten des Fahrzeuges nur teilweise zur Verfügung stehen, wenn ein anderer Benutzer im Fahrzeug angemeldet ist. Till Steinbach, der Autor des Python-Servers, steht auf dem Standpunkt, dass ein automatischer Benutzerwechsel im Python-Server nicht nötig ist und sieht die Verantwortung dafür bei Volkswagen.