How to Replace the Key Battery for the New Mercedes-Benz B150?
1 Answers
From the tail of the key, push upwards on the marked switch, and the hidden mechanical key will pop out slightly, allowing you to remove the mechanical key. Use the just-removed mechanical key to press against the marked position, and with a gentle force, the key casing can be opened. After opening the key casing, you can see that the battery is positioned quite deep. Simply insert an object along the side gaps and gently pry to remove the old battery. When installing the new battery, ensure that the positive and negative poles are not reversed.