Where is the cd multichanger located

could mean it has a jammed cd stuck in it or the kids have pushed two cds into it ,best advice is to buy a new radio with usb and sd card support and not bother with the cd player at all .

It is their fault

They don't care

They should do what is necessary to
have your CD Player work, after disconnecting
the battery, to do other work

Go there & stand the by the vehicle, while
they resolve the issue

The stereo has broken if it won't accept any CDs.

There is nothing you can do to repair this, you must remove the deck and send it out for repair at a factory approved repair station.

If power still to CD Player & Radio, the disc may just be stuck into unit. If it won't eject, after many tries, you need to get unit seen to by In Car Installer / Repair. If no power to unit, try fuse box,

most CD players have approx a 3/16'' wide opening that the CD slides into. you will need a strong 4'' long stainless steel pair of tweezers & a small thin blade knife, approx 3'' to remove the top CD before it will eject the second one. using a small LED flashlight, [second person required] shine it inside the CD player opening & you will see the edge of the top CD. [ when light hits the edge of a CD, it reflects like a mirror]. now gently insert the knife [about 1''] @ a slight downward angle & lift up slowly until you see 2 reflecting edges. grab the upper one with the tweezers tightly & carefully pull it out until you can remove it by hand. it may take a few trys to get it out but, here's where you need some patients. ya! my daughter did that to me too. this was the only way to get it out other than taking the whole unit apart. have fun.

will it play? you may have blown an internal fuse in cd player,

is it in the unit itself have a look carefully if theres a load button on the unit they go into the unit if theres no button indicating this look hard for the changer should be in dash in the unit itself