I tried to remove my head unit by using removal keys and it started to come out. After I pulled it out three inches or so it wouldn't come out any more. It felt like something was restricting it from the back and I was too scared to pull it hard! I have seen videos of people pulling it out all the way with no problems. Am I missing something?
		
		
	
	
		 
	
			
			 
	             
						
					 
 
		 
 
		 
 
		 
 
		 
 
		