Hey Dreyau,
yes exactly. When the shipment tracking showed the packages were in Germany, we got an E-Mail from DHL Express (to the E-Mail address that you specified in the ordering process) with a payment request for the Import VAT. It was a link to a web page where you could use different payment methods. After we paid, the packages were delivered. DHL Express does the customs clearance process for you and adds a small fee for this service. At least this is how it was done in Germany.