Hi, this 'How To' video shows you how to change the CR2025 Battery in a 2012 Mercedes Benz C Class W204 KEY Fob. It is very easy to do and you do not need any tools. The 2025 batteries are very cheap and easy to get either online or in high street shops. Just make sure you get a good brand like Panasonic, Duracell, Energizer etc.
Many thanks Vince
