[TYPO3-project-4-3] Question about magic getters of domain model object

[Sebastian Gebhard]

Hi *,

my domain model object has a field "images" which contains a comma 
separated list of images(image names).

I want to show the first image.

In my HTML-Template is used {car.image}

In Tx_Autoadmin_Domain_Model_Car is wrote this:

function getImage(){
	//die('x');
	$images = explode(',', $this->images);
	if(trim($images[0])){
		return '<img src="'.$images[0].'" alt="Bild von '.$this->tmp_model.'" />';
	}else{
		return '';
	}
}

It returns nothing even when there is an image. When i activate the 
die(), the script runs through, so getImage is not called.

What have i done wrong? Shouldnt {car.image} cause Fluid to call getImage()?