How to Replace the Key Battery for the New Mercedes-Benz GL420-CDI?
4 Answers
To replace the battery for the Mercedes-Benz GLC260 key, follow these steps: 1. First, press the button on the back of the key. 2. While holding the button, slide the back cover forward to open the key. The battery is located inside the slot. 3. Remove the old battery, replace it with a new one, and carefully reattach the back cover. Notes: 1. The key model for the Mercedes-Benz GLC260 is 3V CR2025. Ensure the replacement battery matches this model; otherwise, the key may not function or could be damaged. 2. For Mercedes-Benz models from 2006 to 2013, first flip open the tab at the rear of the key to remove the mechanical key. Then, insert the mechanical key into the slot near the tab to pry open the back cover. Replace the battery and reattach the cover. 3. For all Mercedes-Benz keys from 2014 onwards, the battery replacement method is the same.
I remember changing the key battery for my Mercedes GL420-CDI quite clearly. When the remote suddenly stopped working, I had to do it myself. There's usually a small gap on the back of the key - use a flathead screwdriver or thin plastic card to gently pry open the casing, but don't use too much force or you might scratch it. Inside you'll find a small round battery, model CR2032, which is a common lithium battery available at supermarkets for about a dollar each. Remove the old battery and insert the new one with the positive side facing up, pressing it in gently. After replacing, snap the casing back together and test if the remote lock/unlock function has been restored. If it still doesn't work, the contacts might be dirty or there could be an internal issue with the key - best to have it checked at a shop. The battery typically lasts one to two years; I make it a habit to replace mine every 12 months to avoid last-minute failures, giving me peace of mind during daily drives.
To replace the GL420-CDI key battery, first check the back of the key for any notches, then use a small tool like a key opener to pry it open. Be steady with your movements to avoid damaging it. The battery inside is a standard CR2032 model—remove the old one and install the new one ensuring the positive side faces up. After replacing, snap the case shut tightly and test the remote range to ensure it works properly. If there's no response, check for corroded contacts and clean them with an alcohol swab. Battery aging weakens the signal, so regular replacement is recommended to prevent issues. Occasionally, smart keys may require reprogramming after a battery change—if unsure, look up tutorials online or seek professional help to save time and avoid unnecessary trips.
Our family also owns a Mercedes-Benz GL, and replacing the key battery is for safety. A malfunctioning remote that prevents starting the car is troublesome. Locate the small slot on the key, use a coin or fingernail to gently pry open the casing without applying too much force. Remove the old CR2032 battery inside and replace it with a new one of the same model, ensuring the positive and negative poles are correctly aligned. Close the casing and test the door unlocking function to ensure it works properly. Keep small parts away from children as they can be dangerous. If issues arise after replacement, it might be due to a damaged antenna, so visit a repair shop immediately. Check the key's indicator light monthly for blinking signals; the battery typically lasts about 18 months, so replace it in advance for safety.
