M-Class (W166) Produced 2012-2015

Keyless Go will not work!

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Old 07-08-2016, 01:09 PM
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X350d GLE500e 2017, ML350 BlueTec 2012(sold), A200 2013, ML350CDI 2009(sold), Aston Martin DB7 2003
Keyless Go will not work!

My 2014 ML350BT has one key fob working fine, but the other does not operate as Keyless.
When using it, a warning came up "Replace key fob battery". So I replaced it. Now it will not operate keyless to lock/unlock doors, or to start.
But it will work as a non keyless - press button on fob to lock/unlock doors & insert into dash to start. And no more battery warning.
I replaced the battery again with no success.


Any suggestions?
Old 07-08-2016, 04:48 PM
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Be sure the battery was a fresh, fully charged replacement by buying another one at a different store.
Old 07-08-2016, 04:54 PM
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Get dealer to re-initialize

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