I want to install a system on my vehicle but what is seemingly the easist part to remove is actually the only part I can't remove. I have a Sony HU that was already in my truck when I bought it used. The thing is that the instruction booklet that I got with the truck says I have to use this thin metal key-type thing to remove the unit. I understand how this would work but the previous owner didn't include any such device. What is an easy way to get off this HU off without hurting the car of the HU?
