CAR RADIO CODE. hi , i changed the battery in my car and lost the radio. don't have the code and

Question

hi , i changed the battery in my car and lost the radio. don't have the code and the rover dealers are charging me 35 to reset the code. i looked for numbers on the radio and came up with the type/model # 22dc597/60b and product # fd0499181092172 also a part# xqd101260
the radio itself seems to be inbuilt into the rover, its a 400series car.
can anyone give me the code????
thanks
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