Bmw 5 series dispaly and cd not working son put coins in cd player

You need to re-program the Nav unit (dealer only). That's exactly what happens if you change or work on the Nav unit.

Make sure you have one. Its on the left in the trunk. Load 1-6 cd's in it and then, with the radio on, select CD on the dash

does the unit recognize that a cd is in it? do you see anything saying its in there? if not its kaput..

I had the same problem with an installed CD player. 3 choices. 1: disconnect the plug on the back of the unit to stop the power drain. 2: Install a battery kill switch to turn off the batteries connection to the circuit and stop the power drain. 3: find the fuse for that cd player and pull it out!
If all that fails than it's not your cd player!

Take the radio out and remove the coins is the first thing i would advise

you blew the radio too. take it out and apply 12v directly to it and see if it powers up.

try the aerial connection in the roof behind the interior light its corroded

it should work as long as you buy the correct wire harness for your car go to an auto parts store and look for the harness for your make and model also if you want to get it proffesionally installed where ever you go should carry the harness so you shouldnt have to buy one if thats the path you choose

Try turning your cd disc over, it may be installed upside down!

You player cannot read because copy write enabled ,so you need to play only original CDs ...

Good luck....