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  1. Mercedes-Benz C-Class: How to Replace SmartKey Battery

    May 12, 2015 · This article applies to the Mercedes-Benz C-Class w204 (2007-2014). If your Mercedes-Benz C-Class is warning you that it's time to replace the battery in your key fob, …

  2. Replaced Key battery, warning still appears | Mercedes-Benz Forum

    Apr 17, 2018 · The message to change the battery in the key fob appeared about 6 months ago. So I did, I bought a brand new battery but the message came up the next time I used the key …

  3. Key fob battery replaced and now nothing works | Mercedes-Benz …

    Oct 28, 2020 · The batteries in the key fob have no connection with starting the car or turning in the ignition. The fob batteries operate the lock/unlock, trunk opening, alarm and panic …

  4. R230 Key Fob Battery replacement | Mercedes-Benz Forum

    May 6, 2024 · Looked in the Freq Asked Questions - nothing. How do you replace the battery in the Key Fob?

  5. FOB stopped working *after* replacing battery | Mercedes-Benz …

    Jan 24, 2011 · The key does not need batteries to start the car. If you cannot turn the key at the ignition slot, the power reception coil may have lost soldering contacts to the circuit board. A …

  6. Replace battery key fob / remote ML 350 2008 | Mercedes-Benz …

    Jun 3, 2022 · Replace battery key fob / remote ML 350 2008 #keyfob #ml350 #remote Jump to Latest 8.8K views 7 replies 3 participants last post by Jim-ML320W164 Jun 8, 2022

  7. Reset "Replace key battery" message? | Mercedes-Benz Forum

    Dec 30, 2015 · Can anyone tell me how to reset the "replace key battery" message? This message first appreared last month and I promptly had the battery replaced in my key fob. I …

  8. Key Fob Battery Replacement Question | Mercedes-Benz Forum

    Feb 13, 2010 · I am about to replace the dead batteries in my main key fob for my 1998 SL320 - is it really as simple as just changing them? or is there anything I need to know? My main …

  9. 2007 S550 W221 - Key Fob Batteries Replacement | Mercedes …

    May 4, 2019 · I have 2007 S550 with KEYLESS-GO. I am getting on one of the key that Key Fob Batteries are low. How many betteries of CR2025 I will need for my key fob...

  10. Battery Died Now Key Won't Unlock Doors | Mercedes-Benz Forum

    Apr 8, 2012 · The key worked perfectly before my car battery died. I now get a "Key Not Recognized" message when i enter the vehicle. What the Dealer Said: Buy a new key for …