Once you’ve removed the cover, remove the exposed cr 2025 batteries and replace them with new ones. Insert your smart key into the ignition.
If your smart key doesn't seem to be working.
How to change mercedes key battery 2008. These little keys are powered by batteries, so you need to change them from time to time. These days, mercedes provides you with a smart key fob to lock and unlock your car with. The smart keys are fitted with small batteries like those used in watches.
Release the key as soon as the engine cranks. Hold for additional 1 second. It is ok if the smart key battery is dead.
Get the appropriate replacement battery. Release the key as soon as the engine cranks. Disconnected or empty), the bas/esp malfunction.
13mm socket wrench — you will use this when you take out the bracket that holds the battery in place. In this short guide, we’ll show you all the steps to take. If the power supply was interrupted (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. The start/stop button will pop out. Next time have the dealership change the battery, they can do it without having to reprogram it.
Press the brake pedal and make sure the transmission is in park position. 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. You will have to take it back to a dealer.
Using the valet key, hook and then slide the slider that is located inside of the cavity (towards the notched side of the fob). 10mm socket wrench — you will need this to disconnect the battery from the positive and negative terminals. Make sure to save the engine start/stop button so that you can reinsert it once you change the battery in your mercedes key fob.
Slide the lever on your key fob to the left, and remove the valet key. Then, push it into the narrow opening to unlatch and loosen the cover. 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. 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. First you need to identify which key you have.
There are several mercedes smart key remotes so make sure to look at the correct video. Press the brake pedal and make sure the transmission is in park position. We strongly recommend using a lithium battery like these one s, as they last much longer.
Like any battery, these batteries sometimes die and need to be replaced. How to change mercedes key battery.