How to Replace the Key Battery for the New Mercedes-Benz C280 4MATIC?
2 Answers
To replace the battery for the Mercedes-Benz C280 key, follow these steps: 1. First, press the button on the back of the key. 2. While holding the button, slide the back cover forward to open the key. The battery is located inside the slot. 3. Remove the old battery, replace it with a new one, and carefully reattach the back cover. Notes for battery replacement: 1. Ensure the battery model matches the Mercedes-Benz C280 key specifications; using an incorrect model may render the key unusable or cause damage. 2. For Mercedes models from 2006 to 2013, first slide open the tab at the back of the key to remove the mechanical key. Then, insert the mechanical key into the slot near the tab and gently pry to open the back cover. Replace the battery and reattach the cover. 3. For all Mercedes keys from 2014 onwards, the battery replacement process is the same.
I have a new Mercedes-Benz C280 4MATIC, and recently the key fob stopped working, so I replaced the battery myself. The process was quite simple: first, locate the seam along the edge of the key, then gently pry it open with a small flat-head screwdriver—some online guides suggest using a fingernail, but be careful not to scratch the casing. Inside, there's a round coin battery, model CR2032, and remember to install it with the positive side facing up. When removing the old battery, avoid using excessive force. After inserting the new battery, press the cover firmly until you hear a click. It took me about ten minutes to complete. The battery can be bought at supermarkets or auto parts stores for just a few bucks. I’ve done this with other cars before, and Mercedes’ design is quite user-friendly. If the key still doesn’t work afterward, it might be another issue, like water damage or a faulty button, so it’s best to get it checked. Keeping spare batteries in the car can save you a trip to the repair shop.
