I want to remove the face of sony stereo when i leave my car for security but dont know how it clips off.

Have you tried resetting the microprocessor?

Remove the detachable face. There is a small pinhole on the front of the radio about two inches from the left side near the bottom. Press this in lightly with a fine point pin or paper clip. Hold about 3 seconds, then release.

Replace the face and try it. Let me know.

Since this was an after-market installation of the stereo to security system, Volkswagen won't help. I would recommend contacting BestBuy and asking for the Audio Installation Department. They may have experience in this matter.

try checking to see if you have power going to both the red and yellow wires.

have a look if the surrounding black plastic area, will that come off to allow you to see the removal clips ?? Dont force it as you may damage it, but it should just lightly clip off.

Heres a tip for ya................
when ever i fit a new stereo in my car i never fix it in securly, i just slide it in the hole and leave it. Why i hear you ask !!....well if someone is going to break into my car to steal it i dont want them to smash **** out of my dashboard to get it, they have probably already caused damage getting in. If they make the effort getting in my car by force then they can have the stereo with pleasure, just dont destroy my dash aswell.

The gray are for the right front speakers, there should be 2 white wires for the left front speakers, the purples are for the rear right speakers and the greens are for the rear speakers. The blue is for a power antenna or a remote amp, the red goes to battery ignition, black to ground and yellow to constant battery power, for the stereo memory.

Thats the anti theft mechanism. usually theres a button, or switch you have to press or change somewhere on the stereo. Usually on the base part behind the detachable face.
Without knowing what kind of stereo it is I cant be sure, but some have security codes to prevent the use of it if you dont know the code. the combination needs to be entered with the 0-9 buttons, and is always a 4 digit combo. Usually when you set up that feature, it asks you for a custom security number and if you forget it, your pretty much screwed, as you have to remove the stereo, either find out the memory kill wires, and cross them, or open it up and either cross the memory wires or remove the eternal battery. If this is the case, you will need to have a trained professional fix it, car stereo's are very compact and will be almost impossible to re-assemble it yourself unless you have the proper tools to do it.
Chances are, theres a switch or button you need to use though. You might have acidently hit it without knowing it when taking the face off, or changing the vollume or station.

try a bit of blue tack, this will give you a quick fix untill you can repair

use a bit of blue tack, this give you a quick fix untill you can repair

Hello

Turn on the car so the radio is flashing "Protect." Look on the front / removable face of the stereo. On it you will find a small round hole - that's a reset button. Find a small paper clip, unfold the clip and stick it gently into the hole. The "Protect" will stop flashing, and Kenwood will be displayed. Unfortunately all your settings/presets will be gone, but at least the stereo is working again!