I drive a 1995 c280, I changed the car battery &now when i turn on my car my car stero asks for a code!?? HELP?

I hope some one can help me!!!! i hate driving around with our music!!!I drive a 1995 c280, I changed the car battery %26amp;now when i turn on my car my car stero asks for a code!?? HELP?That is an antitheft mode. Any time the power is disconnected to the radio it will ask for a code before it will function. If you have the radio owners manual there should be a code in there. If not you will need to contact a Mercedes dealer and they should be able to give you the code through the VIN number.