2001 ML320 Key Remote stopped working...best solution?
 

Hi, all
I have three keys form my 2001 ML320 but only one worked with full functionality and the others didn't. Once my third key stopped working, I finally read the manual and found that you can try re-syncing if the remote didn't work. So I tried it by key in ignition to 2, then key out, the press unlock button five times while holding lock button within 10 seconds when pulled out and when I press lock or unlock button, I see that my car locks or unlocks indicating there's connection from the key to the car, but it only works once. Then the key wouldn't work again. I tried this with other two keys (the others that I thought it broke), and it does same thing.
So there is connection, but no more than that.

I went to the dealer to if there is a solution, and as I heard it before, my service manager tells me "get a new key for $375" Now I am upset that I need to put out such $$ for inferior product that goes bad continuously as I already bought a new key 3 years ago.

I googled a little to see if there's a solution and found it could be AAM problem (What is AAM?) which will cost around $600. or get seperate alarm......

If replacing AAM enables my all three keys, I just might do that, but I want to make sure before I proceed. Does anyone know about this? or is there a firm solution for this key thing.....

Thanks in advance.

Hi Todesto,
you are not finalizing your programing. That is why they are working but only ones. Your keys are OK.
With all doors closed:
1. turn key to pos. 2 then back to pos. 0 and remove it.
2. within 10 sec. press and hold lock button.
3. Now push unlock 5 times while still pressing down lock button.
4. Release lock button.
You came all the way to this point but there is one more step to re-synchronization.
5. PRESS TAIL GATE BUTTON TO COMPLETE SYNCHRONIZATION.
This last step is not mentioned at all in my original 1999 ML320 owner's manual.
But it workes, I got two remotes working for my Ml thisway.
Bernard

Thanks, but no luck. I tired it but won't do anything.
Is 1999 and 2001 model same?

Thanks So much Benz80!
 

I just purchased a 2000 ML320 and one of the keys I got would not work.
I tried several instructions to reprogram and nothing worked until I read your post and tried that last detail about the tailgate button.
It worked like a charm.
Saved me a lot of money.
Thanks Again!

Thank you so much! Worked perfectly on my 2001 ML320. :D

Thanks
 

MBENZ80

Thank You. The instructions in the owners manual did not work. Neither did many other solutions that I found on the Net. However, yours worked perfectly.
I am now a happy Benz owner.:)

Works like a charm!!! Thanks!

im having the same problem, any solutions?

Same Problem!!!! The Trunk Lock doesnt fix it for me.

It flashes and thats it. If I press the Trunk lock after releasing the Lock button, it just unlocks the trunk once and thats it.

Please help.

bump??

worked a treat - thanks for the advice

Hey ~

I wanted to reach out and thank you for this. It happened to me last week on my 2013 C300 and read this and was able to correct it today.

Thanks again for the details.

I have the same issue
 

Guys
i just bought a 2001 ML430
it has only 1 key and dealers tell me they no longer have the keys to order so if I don't fix this I'm screwed.
i followed the steps and my key after the one time locking or unlocking does not save the code and the buttons don't work. I can only manually operate my car. It sucks.
please let me know if there is anything else I can do to get it working. I really approve it.
Thank you.

My car shutters when I step on the gas.... I had fuel pump replaced same problem ml320 2002

Hello - are you able to pull the codes? I would also look at your injectors.

Great advice!!!
 

I tried the resetting of the key to unlock and it worked great, I really appreciate the advice!!
I have another issue, I had my ML 320 painted and they removed the rear doors handles without removing the back inside panels, now they don't open the doors from the outside.
Any suggestions?

2001 ML 430 keys still not working
 

Hi Guy's, I tried this procedure with the final step of pressing the tailgate button and nothing worked, so I locked the car, and did all the steps again, this time when I pressed the tailgate button, it unlocked!

So I went outside to test the key buttons, and nothing worked any additional thoughts or advice?

Thanks

Mark

My mechanic says the 2000 ML 320 has a limited number of activations and once you hit the limit you have to replace the remote. I contacted the dealer and they said that there are no longer available and said that I would no longer be able to use a remote. Is this true, what can I do. I have one that works is the one that was least used. Any help would be appreciated. Programming was attempted but nothing. Is there any way to see if the remote is transmitting or am I just out of luck?

Thanks

hi all, thanks for your help in advance.

I am wondering if anyone had been able to resolve this. based on the above posts, the reprogramming works for some.
but for the others not having luck with this, did anyone find any other fix/solution to this? (Thanks)

the resync procedure (hold lock button+press unlock 5times+press any other key) works for me once within 10 seconds of taking it out of the ignition, then it doesn't after.
also my keys did not go bad at the some time, there is about 2-3 months in between.

before this happened, I had changed the battery and everything was fine for a few weeks/months. remote lock/unlock was working with no issues at all.

One day I went for lunch, came back and the remote central unlock stopped working. I used the spare key for a few months until it also went bad. (due to this I am hesitant to accept this is an aam issue - as keys did not go bad at the same time)
tried almost all things I have seen on the internet with no luck.

fyi. central locking button in the console works. just the remote central lock/unlock does not work. car start and runs just fine. (just with an annoying procedure of locking the car from console and then lock by key)

location: australia, 2001 ML320.

hoping someone out there has figured out the solution. any help appreciated!! thanks.

Re benz 80 question.Thankyou Bernard .The solution including tailgate worked for me.

My client car remote stop working
 

Oh my Goodness I thank you for everything
It work like mad