resync key fob ml320 - Page 2 - Mercedes-Benz Forum

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post #11 of 31 (permalink) Old 10-14-2013, 08:34 PM
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I used to have this problem as well. Keyhole's advice is 100% correct and accurate!

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post #12 of 31 (permalink) Old 12-30-2013, 09:01 PM
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Quote:
Originally Posted by mike407 View Post
I have a 2001 ML320 w163. I tried this and was successful in locking the doors, and it appeared to activate the car alarm - the red light next to the radio display came on, and although no noise, if I opened the car door after following this procedure, the hazard lights would begin flashing until I put the key back in the ignition.

My result is that when I finish these steps, the doors lock, but if I hit unlock or any button after that, there is no response. Has anyone else had a similar response? The batteries are brand new and there is no visual damage to the battery contacts.
I'm having the same problem. Please help!!
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post #13 of 31 (permalink) Old 04-02-2014, 02:23 AM
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Mine is also working now. Thanks Keyhole. Have a good one!
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post #14 of 31 (permalink) Old 07-19-2014, 10:28 AM
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Thanks Keyhole

Quote:
Originally Posted by keyhole View Post
You have a W163, right?

Your synch was not quite right. Try this. According to the WIS, the sequence must be completed in 10 seconds!

1. Insert the key into ignition and turn to position 2.
2. Remove the key, and press the LOCK button, and hold it pressed while simultaneously pressing the UNLOCK button 5 times.
3. Now release the buttons, and press either the LOCK or UNLOCK button once.

That should re-synchronise the key. Let us know if it works for you.
Just a quick note to say thanks Keyhole, I used your instructions to sync the Fob and they worked FIRST TIME!!! Greatly appreciate it!!
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post #15 of 31 (permalink) Old 07-25-2014, 08:22 AM
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Just purchased a well used 2001 ML320. Came with two fobs, neither work. I tried to resync them and on one of the keys the dome light turns on at the end of the resync process, but it still does not work. What would the next step in troubleshooting be? My console 'lock all' button works fine. Thanks!
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post #16 of 31 (permalink) Old 07-25-2014, 03:31 PM
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I am assuming you have put new CR2025 batteries in each remote?
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post #17 of 31 (permalink) Old 07-25-2014, 09:41 PM
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Sorry, should have mentioned that - new batteries on both keys. One of them seems to sync (the dome light turns on and off after the resync), but it will not unlock or lock the doors.
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post #18 of 31 (permalink) Old 07-26-2014, 12:17 AM
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Its been few years since I drove ML class, but I remember that keys were user- synchronizable till the year 1999 or 2000.
Newer years take SD and dealers rip-off charges.

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post #19 of 31 (permalink) Old 07-26-2014, 03:22 AM
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I took this from the page in a 2001 PDF version of the manual.

It appears for 2001 the key should sync with these instructions. The timing they give in the directions is crucial.
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post #20 of 31 (permalink) Old 07-27-2014, 03:01 PM
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It is remote synchronization, not the key.
Would be good time to specify what exactly is the problem.
The "fob" usually is used to describe blade-less key.
W163 did have all switchable blades as far as I know.

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