How to Replace the Battery in an Older Mercedes-Benz GL550 4MATIC Key?

[SanAvery]

Steps to replace the battery in an older Mercedes-Benz GL550 4MATIC key: 1. Pull the key upwards while simultaneously releasing the clasp; 2. Use a flathead screwdriver to pry open the back cover of the key to reveal the battery; 3. Remove the old battery and replace it with a new one, paying attention to the polarity; 4. Reattach the back cover. The Mercedes-Benz GL550 is a full-size seven-seat SUV under the Mercedes-Benz GL-Class, weighing 2.5 tons. In terms of body dimensions, this vehicle measures 5146mm in length, 2141mm in width, and 1849mm in height, with a wheelbase of 3075mm.

[OPaislee]

I remember changing the battery in my old Mercedes GL550 key fob several times when it died, and it was actually quite simple. First, you need to prepare a small tool, like a plastic card or a flathead screwdriver—avoid using anything too sharp to prevent scratching the key cover. Then, locate the small gap on the back of the key, usually near the Mercedes logo, and gently pry open the clips. Be careful not to use too much force, as the plastic can easily break. Once opened, you’ll see the coin-cell battery, typically a CR2032 model, which is available at supermarkets or auto shops for about ten yuan each. When removing the old battery, pay attention to the orientation (positive/negative sides) to avoid reversing it, and make sure the new battery is inserted the same way as the old one—usually with the positive side facing up. Finally, snap the cover back on and press it a few times to ensure it’s secure. After replacing the battery, don’t forget to test the lock/unlock functions. If it doesn’t work, take it to the dealership for a check. Key fob batteries usually last two to three years, but if it stops functioning, it’s better to visit a 4S shop to avoid causing issues by handling it yourself.

[VonAyla]

As someone who often does small repairs at home, I find replacing this type of key battery to be the most cost-effective. It saves me hundreds of dollars by avoiding trips to the 4S dealership. The structure of the Mercedes-Benz GL550 4MATIC key is similar to regular Mercedes keys, with a small notch on the back cover that can be pried open using a thin plastic card or the key's teeth. The battery type is CR2032, which costs just a few dollars online or at a grocery store—just remember to choose a good-quality one to avoid insufficient power. When opening it, don't use excessive force; gently remove the battery to prevent short-circuiting or incorrect placement. After replacement, press the cover firmly to ensure it's sealed, then check if the key functions properly. Doing such small tasks yourself is quite convenient and can extend the key's lifespan. If the battery leaks, the key might get damaged and require replacement.

[SanJayden]

Regarding the battery replacement for the old Mercedes-Benz GL550 key, the battery is a CR2032 3V coin type, located on the back of the key. There is a risk when removing the cover, use a plastic card to pry the gap and avoid damaging the internal circuit. Perform the operation quickly to prevent oxidation.

[MacAmelia]

Safety is paramount when replacing key batteries, as I once nearly messed it up. Use non-metallic tools like plastic pry bars or cards, especially for Mercedes keys with small gaps that can crack if forced. Ensure the battery polarity matches to avoid short circuits. Wear gloves to prevent static electricity from damaging electronic components. If you can't pry it open, don't force it—seek professional help. After replacement, verify all functions like locking work properly before use to avoid accidents.