How to Replace the Battery in a Mercedes-Benz ML350-4MATIC Key?
2 Answers
The steps to replace the battery in a Mercedes-Benz ML350-4MATIC key are: 1. Locate the button on the back of the key; 2. Press and hold the button while sliding the back cover forward to open it; 3. The battery is inside the slot, remove and replace it. Taking the 2021 Mercedes-Benz ML350-4MATIC as an example, its body dimensions are: length 5001 mm, width 1896 mm, height 1430 mm, with a wheelbase of 2939 mm and a fuel tank capacity of 66 liters. The 2021 Mercedes-Benz ML350-4MATIC is equipped with a 2.0T turbocharged engine, delivering a maximum power of 220 KW and a maximum torque of 400 NM, paired with a 9-speed automatic transmission.
I've been driving a Mercedes ML350 for over five years and have changed the key battery several times. It's really simple. There's usually a small gap on the back of the key. Just use a coin or a small screwdriver to gently pry it open, and the shell will come off. Inside, you'll find a round button battery, model CR2032, which you can buy at supermarkets or pharmacies. Make sure not to mix up the positive and negative directions—usually, the side with the text faces up. After replacing it, press the shell back together and test the remote locking function. If it doesn't work, check the battery installation. I think changing it every two years is a good idea to avoid any malfunctions at critical moments. The batteries are cheap and easy to get, so doing it yourself saves you the hassle of going to a shop. Plus, it's a good opportunity to clean out any dust inside to keep the key responsive.
