Hi Matt. As long as the cut out and pins are visible, then yes, you can fit a Maps & More unit in your car. Just make sure you get the connecting arm for it though. Also go for the new Garmin version, as it has live weather feeds etc, unless you want to go for a cheaper 2nd hand Navigon unit. You'll have to register it also, but it'll be a good addition to your car!
I hope this helps.
Matt