How to Replace the Battery in a Mercedes-Benz E320 Key?
2 Answers
To replace the battery in a Mercedes-Benz E320 key, follow these steps: 1. Locate the small switch on the upper middle part of the key's back, gently press it to remove the mechanical key; 2. Press the key back cover opening button on the back of the key to remove the back cover; 3. The battery is located in the battery compartment on the left side of the key, remove the old battery; 4. Insert the new battery, ensuring the positive side is facing up; 5. Reinstall the key cover and the mechanical key. Taking the 2019 Mercedes-Benz E320 as an example, its body structure is a four-door five-seater sedan, with body dimensions of: length 5065mm, width 1860mm, height 1482mm, wheelbase of 3079mm, fuel tank capacity of 66 liters, and curb weight of 1950kg.
I've seen many people asking how to replace the battery in a Mercedes E320 key, so I'll share a detailed process. It's actually quite simple. First, confirm the key model - it's usually that remote control type. Use a small flathead screwdriver or coin to gently pry open the plastic case at the small notch on the back of the key. When removing the old battery, pay attention to the positive/negative polarity - generally the + side faces up. Mercedes commonly uses CR2032 batteries, which you can buy at any supermarket. Insert the new battery with correct alignment. Finally, gently snap the case back together until you hear a click indicating it's locked. Test the car lock buttons to ensure proper functioning and avoid poor contact after reassembly. Remember to be gentle - these precision components shouldn't be forced to avoid damaging the clips. The whole process takes about 10 minutes, much more time and cost efficient than visiting a dealership.
