How to Replace the Battery in an Older Mercedes-Benz E200 Key?
2 Answers
Here’s how to replace the battery in an older Mercedes-Benz E200 key: 1. There is a small switch on the upper-middle part of the back of the key. Gently press it to remove the mechanical key, then press the key back cover release button and take off the back cover. 2. The battery is located in the battery compartment on the left side of the key. Remove the old battery and insert the new one, ensuring the "+" side faces upward. 3. Reinstall the key cover and mechanical key. Operate the key’s lock and unlock switches to check and confirm that the doors can be locked/unlocked. 4. Note: The replacement battery must be of the same specifications. Only use a new battery with the same rated voltage, size, and specifications to replace the old one.
As a veteran driver with decades of experience, I find changing the battery for a Mercedes-Benz E200 key quite straightforward. When the remote stops responding, it's likely just a dead battery. The older model keys typically feature a flip-open design with the battery housed in a small compartment on the back. Use a small tool like a screwdriver or coin to gently pry open the key from the edge—apply light pressure to avoid damaging the casing. Once open, remove the old button battery (usually a CR2032 model, so be careful not to mistake the type), insert the new battery with the positive side facing up, then align and press the cover firmly back into place. The whole process takes just minutes, saving you a trip to the dealership. But if you're unsure about the battery model, it's best to check the manual or verify the specifications online. I always keep spare batteries handy to avoid any last-minute panic.
