First you need to identify which key you have. Press in on the chrome portion of the key fob as you pry out the battery holder by hand.
Reprogramming key fob after changing the battery.
How to change mercedes key battery 2016. Then, push it into the narrow opening to unlatch and loosen the cover. If the other buttons work, the problem is a bad unlock button. Generally speaking, when mercedes key fob is not working, it’s because either because the key is defective or the all activity module (aam) is not recognizing the key signal, or it is not receiving signal due to an antenna issue.
Once you’ve removed the cover, remove the exposed cr 2025 batteries and replace them with new ones. 10mm socket wrench — you will need this to disconnect the battery from the positive and negative terminals. There are several mercedes smart key remotes so make sure to look at the correct video.
The key fob itself could be defective or have a bad unlock button. If it unlocks the door, the problem may be a weak battery in the key fob, or a problem in the keyless entry antenna or wiring. Release the key as soon as the engine cranks.
The start/stop button will pop out. Keys have a lot of stored data and can be corrupted to the point of having to buy a brand new key, which can run a couple hundred buck. Try the lock button, trunk release button or panic button.
Model year 2012 2013 2014 2015 2016 2017 2018 2019 make model battery type chevrolet avalanche 2032 2032 — — — — — — blazer — — — — — — — 2032 Take the battery compartment out. Slide the lever on your key fob to the left, and remove the valet key.
Get the appropriate replacement battery. Locate and test the battery. To change a mercedes key battery, start by pulling the silver tab at the bottom of the key holder back to release the manual key.
Press a finger on the lock button of your key fob while the key is in the mercedes' ignition. Press the brake pedal and make sure the transmission is in park position. Next time have the dealership change the battery, they can do it without having to reprogram it.
Put your key horizontally into the open slot. Common mercedes key fob problems Replace the existing cr 2025 batteries with two new ones.
Turbo once every 4 years for optimal performance. Using the valet key, hook and then slide the slider that is located inside of the cavity (towards the notched side of the fob). It is ok if the smart key battery is dead.
Push the key into the narrow end of the slot to remove the cover. Do not turn on the vehicle. You will have to take it back to a dealer.
13mm socket wrench — you will use this when you take out the bracket that holds the battery in place. Although some batteries last much longer, most batteries begin breaking down chemically after four years, so you could experience dimmer headlights and other negative effects before you have a. Insert your smart key into the ignition.
Most vehicles with the battery in the. Pull on the tab at the bottom of the fob. We strongly recommend using a lithium battery like these one s, as they last much longer.
Then simply replace the battery with a new cr 2025.