How to Replace the Key Battery for the New Mercedes-Benz B-Class?
3 Answers
Method for replacing the key battery of the new Mercedes-Benz B-Class: First push up the marked switch, take out the mechanical key, open the key casing, then pry out the old battery and replace it with a new one. The Mercedes-Benz B-Class includes models such as the B180, B200, and B260. Among these, the B200 has dimensions of 4273mm in length, 1777mm in width, and 1593mm in height, with a wheelbase of 2778mm. In terms of interior, this model's cabin shows no significant differences from previous Mercedes-Benz models. The dashboard layout still follows the brand's traditional design. However, in the Fashion trim, the central display does not come with a navigation system; it is merely a simple color screen that provides functions such as audio, Bluetooth hands-free calling, and system settings display.
I just replaced the battery for my new Mercedes-Benz B-Class key, and it was quite straightforward. Hold the key and press the small button on the side to slide out the metal key blade. Then, a gap will appear in the key casing—use a plastic card to gently pry open the cover. Inside, you'll find a small round CR2032 battery, which you can buy at any supermarket for just a few bucks. When installing, make sure the positive side faces upward—I once put it in backward, and it didn’t work. After placing the new battery, close the cover and press lightly until you hear a click to secure it. Test the unlock and ignition functions to confirm everything works—the whole process takes just minutes. It’s a good idea to keep a spare battery with you in case of sudden power loss. Key batteries typically last two to three years, so check them periodically—don’t wait until they fail completely, as it could affect driving safety. I recommend consulting the owner’s manual or online video tutorials for additional reference steps.
I've changed the battery for my Mercedes-Benz B-Class key a few times - it's practical and straightforward. First, remove the mechanical key: press the side button to pull out the metal part, exposing the battery compartment. Use a fingernail or small screwdriver to pry open the cover. The battery model is CR2032 - when purchasing, check the packaging to avoid counterfeits. During installation, ensure the shiny side faces upward. When replacing the cover, align it properly and press until you hear a click, then test the key functions by approaching the car to unlock it and observing the response speed. If there's any delay, check and clean the contacts. I recommend keeping a spare battery in the car to avoid inconvenience during malfunctions. The replacement process takes about ten minutes. Remember to use plastic tools to prevent scratching or damaging the casing. Over time, the key's contacts may oxidize - gently clean them periodically to extend lifespan. No additional settings are usually required after battery replacement - that's typically all it takes.
