ML500 MCS Lock
Thread Starter
Newbie
Joined: Aug 2023
Posts: 6
Likes: 0
From: Portland
ML500
ML500 MCS Lock
Just picked up a 2003 ML500, coming over from a W204 hatch. Sad to see her go but enjoying all the space + suspension for my new family.
It came radio locked, I have my radio code present within the pamphlet case that it came with from the dealer.
I called the 1-800 number & they told me the same number that I have on hand.
When I enter the code, the cursor just blinks…
No wait, no wrong code, no prompt, nothing, i’m not locked out at all either; I can enter any amount of numbers in the code input screen - It’s as if I didn’t hit enter/ok - when I did.
Ive tried holding the “OK” button key, pressing it, repetitively & slowly.
I almost want to say it’s broken, but it illuminates so I figure it’s still functioning.
I haven’t seen anyone else with this issue on the internet & im kind of defeated - I really don’t want to swap out a whole radio head over something so minuscule.
Is there any workaround?
It came radio locked, I have my radio code present within the pamphlet case that it came with from the dealer.
I called the 1-800 number & they told me the same number that I have on hand.
When I enter the code, the cursor just blinks…
No wait, no wrong code, no prompt, nothing, i’m not locked out at all either; I can enter any amount of numbers in the code input screen - It’s as if I didn’t hit enter/ok - when I did.
Ive tried holding the “OK” button key, pressing it, repetitively & slowly.
I almost want to say it’s broken, but it illuminates so I figure it’s still functioning.
I haven’t seen anyone else with this issue on the internet & im kind of defeated - I really don’t want to swap out a whole radio head over something so minuscule.
Is there any workaround?
MBWorld Fanatic!
Joined: Sep 2013
Posts: 2,374
Likes: 703
2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
The radio may have been swapped out previously and the old code isn’t valid anymore. I think there is a serial number on the back of the radio that might help get the right code. If you can get through to the right person (a tech — service advisor will just say bring it in) at the local dealership, they may be able to help.
Thread Starter
Newbie
Joined: Aug 2023
Posts: 6
Likes: 0
From: Portland
ML500
The radio may have been swapped out previously and the old code isn’t valid anymore. I think there is a serial number on the back of the radio that might help get the right code. If you can get through to the right person (a tech — service advisor will just say bring it in) at the local dealership, they may be able to help.
My next issue now is that there is no sound coming from the radio, the channels scan, I can run through AM/FM channels but no sound at all. CD player and tape seem to work too - but no luck yet. Still looking into this issue as I type this.
