Version 1.7.0 of the vehicle search extension added a caching mechanism that stores all requested vehicle data in a static file. A scheduler task was also added so that updated data is received regularly and cached vehicles are removed at regular intervals.
The cached data also contains HTML for list entries and single views. If you customize configurations or templates, you may also need to clear the cached files.
You can activate/deactivate the cache by using the following TypoScript setting:
plugin.tx_fahrzeugsuche.settings.cache = 1