How to Replace the Battery in a Mercedes-Benz E320 Coupe Key?
2 Answers
To replace the battery in a Mercedes-Benz E300 key, first find a screwdriver. Then, separate the metal key and use the screwdriver to pry open the gap. Once opened, you can replace the battery. Below is relevant information: 1. The car smart keyless product is created by integrating the world's most advanced RFID radio frequency technology with an advanced vehicle identity coding recognition system, combining remote control and keyless systems. 2. Typically, when the owner approaches the vehicle within about one meter with the key, the door locks automatically unlock and the anti-theft system is deactivated. When the owner leaves with the key, the door locks automatically and the anti-theft system is activated. The Mercedes-Benz E300 uses this smart keyless product. To replace its battery, simply use a screwdriver to gently pry open the key, revealing the battery inside for replacement.
I'm familiar with replacing the key battery for a Mercedes-Benz E320 Coupe. On the back of the key, there's a small button—press it to slide out the mechanical key. Then, you'll notice a thin seam along the edge of the key casing. Insert the tip of the mechanical key into the seam and gently pry open the shell. Inside, you'll find a round coin-cell battery, model CR2025. Use your fingernail to pop it out. When installing the new battery, pay attention to the orientation—the side with the plus sign should face upward and align with the slot before pressing it in. Finally, align the casing and press it shut until you hear a click. Avoid using excessive force during the process, as the plastic clips can break easily. I recommend laying down a soft cloth beforehand to prevent the key from getting scratched if it falls. In winter, the battery drains faster, so it's generally best to replace it every two years.
