Web Scraping: How to force a drop-down box to appear?

Hi!

I am currently trying to scrape information from a website (bodenrichtwerte-boris.de) and am stuck. I am using IE.

After you click on the map, you can enter an address into a field. While you are adding the address, a dropdown menu is generated from which you must choose (see first picture).


My problem is that, if I enter a value into the field using VBA, the dropdown menu is not generated (see second picture)

How can I trigger that dropdown menu to pop up?

Here is the code I am using:

Set HtmlDoc = LoadSite(IE, strUrl, bShowBrowser) 'Load site and tie variable to HTML object model
Set HtmlElement = HtmlDoc.getElementById("karte")
HtmlElement.Click
Application.Wait (Now + TimeValue("0:00:02"))
Set HtmlElement = HtmlDoc.getElementById("multisearchinput")
HtmlElement.Value = "Lotsenweg 11, 24376 Kappeln"