How to Replace the Battery in a Mercedes-Benz E220 Diesel Key?

[CharlesDella]

Mercedes-Benz E220 Diesel key battery replacement method is: 1. Purchase a new battery; 2. Push open the latch and pull out the mechanical key; 3. Use the mechanical key to press the button and pop off the cover; 4. Remove the old battery, replace it with the new one, and reattach the cover. Precautions for replacing car key batteries include: 1. When disassembling the car key, wrap the tip of the screwdriver with a cloth to prevent damage to the key; 2. The disassembled key and circuit board must not get wet, try to keep them dry; 3. Do not touch the components on the circuit board; 4. The model of the new battery must match that of the old battery.