I often work remotely and prefer using en-us locale settings for my searches. One of our computers is located in Germany, and whenever I try to change the location in Google Search Settings, I get an answer to "Pleas enter a valid Deutschland city or zip code".

I checked this post, but it doesn't apply, as my language settings en-us and the Google search language is also set to English. It clearly uses the IP address of the computer.

I couldn't find an answer in the Google help pages, anyone any idea how to change it London, New-York or Amsterdam?