How to Replace the Key Battery for Mercedes-Benz A45?

[ElliottLynn]

Steps to replace the battery for Mercedes-Benz A45 key are as follows: 1. Before removing the mechanical key, gently press the switch on the back of the key. 2. Press the key cover switch on the back of the key to open the key cover. 3. Then push the battery compartment on the left side of the key. 4. A small flat-head screwdriver can be used to remove the old battery. 5. Ensure the new battery is placed with the positive side facing up. 6. Reinstall the key cover and mechanical key. 7. Operate the key's lock and unlock switches to check and confirm that the doors can be locked/unlocked. Additional notes regarding the battery: 1. Improper battery replacement may damage the car key. 2. Using an unsuitable or non-compliant battery may damage the car key. Pay attention to the voltage, size, and specifications when purchasing a new battery. 3. Be careful not to damage the key components when replacing the battery. 4. To prevent the key from failing prematurely, avoid pressing the unlock button outside the sensing area. 5. Being within a 1-meter range of a magnetic field may cause the battery to become magnetized and fail. 6. Ensure your hands are dry during the battery replacement process to avoid causing internal components to rust.