MY 2001 ML 430 FM RADIO IS WORKING BUT VERY FAINT AM CD NAVI IS ALL FINE BUT WHEN I TURN TO FM ITS JUST NOT LOUD I TURN IT UP ALL THE WAY AND STILL VERY FAINT SOUND

Check the aerial lead behind the unit and also the connection of the rear window. Did you wipe the rear window lately? AM has a built in aerial, FM needs an antenna. Or you may have a roof mounted aerial.

If you are unable to find the owners manual packet with the radio code card inside, you can submit that information(VIN) to any Mercedes dealer with proof of ownership and they will be able to tell you the code.

reset radio or replace

Mechanic somehow fouled up your radio. Blown fuse maybe? It is a 12yr old radio, coincidence? Probably not.

Just get a different one from a auto wrecker, It will cost you less then having the old one (Repaired)

There's a website that has all this information about all this and manuals everything totally free there are many actually but I personally like few reliable-store .. let me know if u need help
thanks

Well, if you push the cd button and no cd player is installed, then you can try a salvage yard to find one and have an auto electric shop install it for you.

Otherwise, you can go to a place like Best Buy, and have them install a cd changer, like a Sony, for instance, that plays through a certain FM stereo frequency on your radio and they might be able to make it so that it powers up when you hit the cd button, although

many times they'll just have it power up on your ignition key being on, and you have to remember what frequency or preset on your radio to have to hear the cd-player play.

That's tech for you.

for sure button for FM is out of order

i was wondering if you were able to find a solution for this. I am currently having this same problem with my vehicle (as a few others as well). if you could please let me know, id greatly appreciate it. my email is [email protected].