2 hours, not days. You have 3 chances to enter the correct code when the radio spells CODE, after that the radio spells OFF. To regain CODE, the radio must be turned on for 2 hours. Just make sure the battery is good first, then turn the key to position I with the radio switched on, close the door and come back in 2 hours or so.

I have found the code written on top of the radio box on some 850s, just pull the radio out of the console and see if there are 4 numbers written on top. Numbers must be 1-6 only.

A call to you local dealer parts dept can get you the code, you supply the VIN or the radio serial number. Write the number down and put it in the glove box.

Klaus
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Always willing to listen, just not able to take direction.