Hello, I really have a stupid question: is there any trick to pull the plugs at the back of the sony (without a cd changer)? I don’t get the dinger off. my problem: on the left I don’t have any sound anymore. to find out if it’s on the radio itself, or on the cabling/boxing, I want to connect another ford radio. add question: can you damage the lock with self-made unlocking devices? 4 to 5 MAl has worked, now the thing wants to go left can the original tools help? help!! thanks ;-))