How to Replace the Battery in a Mercedes SLC Key?
2 Answers
The back of the key has a button. Press this button and slide the back cover of the key forward to open it. The battery is located in the slot next to it. Pay special attention to the battery model. Most Mercedes keys use a 3V CR2025 battery. After opening the slot, remove the old battery and replace it with a new one. Here is more information about Mercedes keys: 1. Mercedes' three generations of car keys over the past twenty years. The key design is not related to the vehicle model or series. Within the same era, whether it's a C-Class, E-Class, or S-Class, their keys are basically the same, and the battery replacement methods are also similar. 2. For Mercedes keys from 2006 to 2013, first flip open the tab at the rear end of the key to remove the mechanical key. Insert the mechanical key into the slot at the tab position and apply slight force to pop open the back cover. Then remove the depleted old battery, replace it with a new one, and close the back cover.
Changing the battery for a Mercedes SLC key is actually quite simple. I often DIY these small tasks myself. There's a small groove on the back of the key; gently pry it open with a fingernail or a thin card to access the battery compartment—don't use too much force to avoid damage. Remove the old battery and check its model, usually a CR2025, and make sure not to get the wrong one when buying a new one. When inserting the new battery, ensure the positive side faces outward and aligns with the slot. After closing the cover, test the buttons to see if they unlock the car. It's recommended to replace the battery every two years, and keep a few spare batteries in the car—running out of power at night can be a hassle. By the way, Mercedes keys are designed to be sturdy, but avoid operating in humid environments to prevent short circuits and functional issues. Doing it yourself saves money and hassle. If the key doesn't respond after the operation, first check the battery orientation before considering other issues. If it still doesn't work, visit a professional shop.
