How to Replace the Key Battery for Mercedes-Benz R500 4MATIC?
2 Answers
The steps to replace the key battery for the Mercedes-Benz R500 4MATIC are: 1. Slide the small toothed switch at the end of the remote to the right to remove the mechanical key; 2. Insert a tool into the rear of the key slot and pry to open the back cover; 3. Press lightly to remove the old battery and replace it with a new one. The Mercedes-Benz R500 4MATIC has the following body dimensions: length 5157 mm, width 1922 mm, height 1661 mm, and a wheelbase of 3215 mm. The Mercedes-Benz R500 4MATIC is equipped with a 5.5L turbocharged engine, delivering a maximum power of 285 kW and a maximum torque of 530 Nm, paired with a 7-speed automatic manual transmission.
I've been driving a Mercedes for ten years, and changing key batteries is a routine task. The smart key battery for the Mercedes R500 is hidden on the back of the key, with a small groove that needs to be pried open. The model is usually CR2025, which can be found cheaply in the electronics section of supermarkets. Remember to prepare a small tool, such as an old bank card cut into a card-shaped piece, align it with the gap, and gently push to pop the cover open. When removing the old battery, pay attention to the positive and negative directions—the convex side usually faces up, don't reverse it or the signal may become unstable. After inserting the new battery, press the cover firmly until you hear a click, indicating it's locked. Test the key function: press the unlock button near the car door to see if the response is quick. If the signal weakens, it's time to replace the battery—I recommend checking every two years to prevent failure. During one operation, I used a metal tool and almost scratched the key, so now I only use plastic tools for safety. The whole process is simple and takes just five minutes, saving money and hassle.
