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Mercedes s420 keyless entry reprogram

Added new battery to fob. fob vr red blinks proving signal sent... worked once .. maybe twice.... now the fob doesn't lock/unlock the door, i must do it with a key

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What year model is youre S420 and do you have key with 3 buttons and a card with one button. More detail please

Posted on Jan 15, 2013

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  • Eric A Goldstein Jan 15, 2013

    its a 96 S420 has a ONE BUTTON like first generation keyless entry.... one button but it is def a mercedes logo across the single button.

  • Eric A Goldstein Jan 15, 2013

    probably cant be uh "programmed" eh :)

  • Eric A Goldstein Jan 15, 2013

    car didnt come with the maunal

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Posted on Jan 02, 2017

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onyeredson
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SOURCE: mercedes 1999 c200 key fob

Hello Haq!
Could it be the key just needs re-coding? maybe you are worrying to much as £177 would be about right as that would need coding etc., Try phoning your local Merc dealer or take the key and V5 to them for coding (Hopefully)
Good Luck!
Paul 'W'
Onyer~EDson(:0)~[><

Posted on Jan 06, 2009

  • 1779 Answers

SOURCE: '03 Hyundai Elantra - Keyless entry remote not working

It wouldn't be the car battery, but since you just purchased the car, the dealership should correct the problem. Bring it to their attention right away. Did you get any kind of warranty? Most dealers have at least a 30 day warranty for things like this.

Posted on Apr 05, 2009

  • 77 Answers

SOURCE: keyless entry on honda civic 2006 not working

The keyless entry is designed to work with the doors closed (closed - not locked). If the door ajar sensor thinks the door is open the keyless entry is disabled. When you manually lock the door it might tighten the door just enough to activate the keyless entry. I would try slamming all the doors closed and then see if the keyless entry works. If it still wont work have the wiring checked on the front door lock.

Posted on May 12, 2009

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