The webpage is currently unnavigable due to a persistent, invisible overlay. Your first priority is to bypass this overlay to access the website content. Once the overlay is dismissed, navigate to the 'Gebrauchtwagen' (Used Cars) section and identify the total number of used cars listed on that page. If the overlay cannot be dismissed, state this clearly.
Navigate to 'https://wellergruppe.de/' Attempt to identify and interact with any element that might dismiss the invisible overlay, such as an 'X' button, 'Accept' button, or by pressing 'Escape'. If the overlay is successfully dismissed, locate and click the 'Gebrauchtwagen' (Used Cars) link. Once on the 'Gebrauchtwagen' page, identify and extract the total number of used cars listed. If the overlay cannot be dismissed after multiple attempts, clearly state that the page remains unnavigable.
Successfully dismiss the invisible overlay to gain access to the website content. Successfully navigate to the 'Gebrauchtwagen' (Used Cars) section. Accurately state the total number of used cars listed on the 'Gebrauchtwagen' page. If the overlay cannot be dismissed, clearly state that the page remains unnavigable and provide evidence of attempts to dismiss it.