How to Replace the C200 Key Battery?
2 Answers
Method for replacing the C200 key battery: There is a button on the back of the key. Press this button and push the back cover of the key forward to open it. The battery is located in the adjacent slot. Pry open this slot, remove the old battery, and replace it. During the replacement process, it is crucial to pay attention to the battery model. Most C200 key batteries use the 3V CR2025 model. In terms of exterior design, the C200 features polygonal headlights equipped with eagle-hook-style LED daytime running lights. The front grille adopts a trapezoidal design with a starry mesh pattern, complemented by a sporty front bumper, giving the overall design a more youthful appeal. Regarding the powertrain, the C200 is equipped with three different engine options, including a 1.5T inline-four (model 254915), a 1.5T inline-four with 48V mild-hybrid system, and a 2.0T inline-four (model 254920).
Last year I replaced the battery for my Mercedes-Benz C200 key myself, which was really convenient and saved money. Step 1: Locate the small groove or button on the side of the key, then gently press or pry open the casing. Remember not to use anything too hard—I once used a small screwdriver and nearly scratched the plastic. Step 2: Once the casing is open, you’ll see the old battery, which looks like a small coin, usually the CR2032 model. When buying a new battery, make sure to check the orientation—place it with the positive side facing up. Step 3: After inserting the new battery, gently snap the casing back together until you hear a click. The whole process takes less than 5 minutes—just test the unlock and lock functions to make sure they work. I recommend replacing the battery every two years or when it runs out, and keep a spare battery on hand to avoid overpaying at a shop in an emergency. Also, if the key still doesn’t work after replacing the battery, check if it got wet or was damaged from a drop—don’t force it open. Remember to choose high-quality battery brands like Panasonic or Samsung, available at supermarkets or auto shops for around 10 yuan—no need to get ripped off at the dealership.
