How to Replace the Battery in a Mercedes-Benz GLC Key?
3 Answers
Method for replacing the battery in a Mercedes-Benz GLC key: Select the battery according to the key model, push the switch at the end of the key to eject the mechanical key; use the key to press against the marked position to open the casing, then use a paper strip to pry out the old battery; install the new battery, paying attention to the positive and negative poles, then reassemble the casing and mechanical key. The Mercedes-Benz GLC is a mid-size SUV launched by Mercedes-Benz, with body dimensions of 4764mm in length, 1898mm in width, and 1642mm in height, and a wheelbase of 2973mm. In terms of power, this vehicle is equipped with a 2.0T turbocharged engine, and in terms of the transmission system, it is paired with a 9-speed automatic manual transmission.
I previously changed the battery in my Mercedes-Benz GLC key and found it quite easy. First, press the small button on the side of the key to release the mechanical key part. You'll see a screw hole. Use a small Phillips screwdriver to gently loosen the screw—don't apply too much force to avoid damaging the plastic casing. Once the back cover is pried open, you'll see the coin battery, usually a CR2032 model, which can be bought cheaply at a supermarket. The battery has positive and negative markings; the old battery's positive side faces up, so make sure the new one is aligned the same way—installing it backward will render the key unusable. After inserting the new battery, gently snap the back cover back into place, re-tighten the screw, and finally test the lock/unlock functions to ensure they work. The whole process takes less than 5 minutes. If you're worried about messing up, watch an online video tutorial or prepare a plastic pry tool to avoid scratching the key. Remember to replace the battery when the key starts responding slowly—don't wait until it fails completely to avoid inconveniences. Doing it yourself saves a lot of money compared to the expensive fees and long waits at the dealership.
I once tried replacing the battery for my Mercedes-Benz GLC key. I was a bit nervous the first time, but I quickly got the hang of it. The main thing is to locate the small screw on the edge of the key, unscrew it, and then you can open the casing to find a small round battery inside. Just go to a convenience store and buy a CR2032 coin battery—it only costs a few bucks. When putting it back, pay attention to the positive and negative markings: the side with the plus sign is the positive terminal, so don’t put it in backward, or the key won’t work after replacement. Use a common small Phillips-head screwdriver from home, and handle it gently—no need to force it. After reassembling the key, it’s best to test the lock button for responsiveness. If you’re unsure, you can look up Mercedes-Benz GLC battery replacement videos online—there are plenty of detailed guides. Personally, I think DIY isn’t complicated; it saves time and money while teaching you a new skill. Just replace the battery when the key starts acting sluggish—don’t wait until it fails at a critical moment. These little car maintenance tricks are quite handy, so I recommend checking the battery life regularly.
