How to Replace the Key Battery for Mercedes-Benz GLA200?

[LeTalia]

To replace the key battery for the Mercedes-Benz GLA200, follow these steps: 1. Locate and press the push button on the side of the remote control to remove the mechanical key. 2. Use force to pry open the groove and gap, splitting the key into two halves. 3. Remove the old battery from the circuit board, replace it with a new one, reinsert the circuit board, and close the key. Taking the 2020 Mercedes-Benz GLA200 as an example, it is a compact SUV with the following dimensions: length 4417mm, width 1834mm, height 1610mm, and a wheelbase of 2729mm. The 2020 Mercedes-Benz GLA200 features a MacPherson strut front suspension and a multi-link rear suspension. It is equipped with a 1.3L turbocharged engine, delivering a maximum horsepower of 163PS, a maximum power of 120kW, and a maximum torque of 250Nm, paired with a 7-speed dual-clutch transmission.

[KarterLynn]

I remember changing the battery for my Mercedes-Benz GLA200 key—it was super easy. I just used a coin or a small screwdriver to gently pry open the casing from the small gap on the back of the key. Inside, there's a round CR2025 coin battery. When removing it, make sure to note the orientation so you don't put the new one in upside down. After inserting the new battery and closing the cover, test the key by locking and unlocking the doors to make sure it works. The key is to pry gently to avoid breaking the clips. When the battery dies, the key won't respond, so I recommend keeping a few spares at home. You can buy them cheaply at supermarkets or online, and doing it yourself saves time and money—no need to visit a repair shop.

[DelXavier]

At first, I was quite nervous about changing the key battery, afraid of damaging the Mercedes-Benz GLA200 key. Take it slow when doing it: first locate the seam in the middle of the key and gently pry it open with a small tool. Before removing the old battery, remember its orientation—usually the positive side faces up—and align the new battery accordingly. After replacement, close it tightly and test the unlocking function. If unsure about the steps, online video tutorials make it easy; or simply visit the dealership to have a technician assist for peace of mind. Don’t rush the process—replace the battery promptly when the signal weakens due to depleted battery life.

[PaulLynn]

DIY key battery replacement is really fun, I managed to do it easily for my Mercedes-Benz GLA200 key. Just use a coin as a tool to pry open the small latch on the back and remove the battery. Make sure not to buy the wrong CR2025 model, and when installing the new battery, place the positive side facing up. After closing it, test the key's unlocking function. With the right tools prepared, it only takes two or three minutes to finish, giving a great sense of accomplishment.