I change the battery on my 1999 Honda Odyssey now the radio ask for a code I call Honda dealer they said to find the code inside sticker inside the glove compartment there is nothing there I'm the 3rd owner so they said to press 1 + 6 then turn the radio power on didn't work either so they told me I need to remove the radio and get the serial number or maybe the code will be there or I can take it to them but they charge 100.00 dlls ! I don't have money but I need my radio (4 kids are driving me crazy without music)so can you please tell me step by step how to remove the factory radio? or there is any video that can show how? thanks