Just found out about this feature recently: if you enter a location into the search box in Google Maps, you can download the result as a waypoint directly to some GPS systems, including Garmin and TomTom. After you get a search result in Google Maps, click on the “Send” link in the upper left:
You’ll get a box that comes up with the default to email the map link, but there are additional links for Car and GPS:
Click on GPS, and choose your brand: Garmin, Pioneer or TomTom:
Click on Send, and you’ll be directed to a page that lets you download it to your GPS:
To use this feature, you’ll need to have the right software installed on your computer to use it with your GPS:
Clicking on the Car option brings up the option to send the waypoint to a BMW or Mercedes-Benz built-in GPS if you have a BMW Assist or Mercedes Tele-Aid account.