How to Replace the Battery in an Older Mercedes-Benz GL450 Key?
3 Answers
Method for replacing the battery in an older Mercedes-Benz GL450 key: First, slide open the tab at the rear end of the key to remove the mechanical key. Insert the mechanical key into the side slot of the key holder, press the internal gray button, and with the other hand, push the rear end of the key upward. Once a gap is created, the mechanical key can be removed. Then, manually take out the rear end to access and replace the battery. After replacement, reinsert the key holder. The Mercedes-Benz GL450 is a full-size SUV with body dimensions of 5099mm in length, 1920mm in width, and 1840mm in height, featuring a wheelbase of 3075mm. It is equipped with a 4.7-liter naturally aspirated engine.
Replacing the battery in an old Mercedes-Benz GL450 key is something I've done several times myself, and it feels incredibly simple and cost-effective. The key is usually the folding type with buttons, and you need to carefully pry open the back cover when opening it. I recommend using a small plastic tool or a coin to gently push into the seam on the side of the key—avoid metal tools to prevent scratches. Once opened, you'll see the battery slot, typically for a CR2032 battery, which you can buy for just a few dollars at a supermarket or online store. Remember to remove the old battery and insert the new one with the correct orientation. After reassembling, press the buttons a few times to test if the signal works properly. The whole process takes less than 5 minutes, and the key regains its responsiveness immediately. Keep an eye on the battery life during regular maintenance to avoid issues with unlocking on the go. If you're not familiar with it, asking a car-savvy friend to take a look is also a convenient option.
As a novice driver, I was a bit nervous the first time I changed the GL450 key battery, but I found it quite easy once I got started. Prepare a CR2032 battery and a plastic pry tool to avoid damaging the key. First, flip the key over and locate the small slit on the edge, then gently pry open the casing with the tool. Once opened, lift the cover gently to reveal the circular battery. Carefully remove the old battery, avoiding direct contact with the metal surface with your fingers. Then, align the new battery correctly with the positive and negative terminals in the slot and press it into place before reassembling the casing. After replacement, remember to test the key buttons. If the car lights flash or the door locks respond, it means the replacement was successful. The entire process can be done at home, saving you hundreds of dollars that would otherwise be spent at a 4S shop. Be gentle during disassembly and reassembly, and just stay patient.
