How to Replace the Battery in a Mercedes-Benz E500 Key?

[LaPenelope]

The method for replacing the battery in the latest Mercedes-Benz E500 key is as follows: 1. Push the switch at the end of the key to remove the mechanical key from the smart key; 2. Gently pry open the key casing to reveal the battery; 3. Remove the old battery and install the new one; 4. Reattach the mechanical key. Additional relevant information includes: 1. The dimensions of the latest Mercedes-Benz E500 are 5078mm in length, 1860mm in width, and 1490mm in height, with a wheelbase of 3079mm. 2. The latest Mercedes-Benz E500 is equipped with a 2.0T turbocharged engine, delivering a maximum power of 220kW, paired with a 9-speed automatic transmission.

[Alexis]

Just helped my neighbor with this issue! For the Mercedes E500 smart key, there's a small slot on the back. Use a coin or small screwdriver to pry it open—just a click and the back cover pops off. The battery is a thin CR2025 button cell, so make sure not to get the wrong model. When replacing, pay attention to the orientation—the silver side usually faces outward. Once, I accidentally dropped the battery, and the key's sensing range shortened until I reinstalled it properly. The whole process takes at most three minutes, but be gentle when prying—those plastic clips can crack easily.

[AndrewLee]

Just changed my car key battery myself last week, and it was honestly easier than expected. Flip the key over to the backside, and you'll find a small groove near the keyring end. If your fingernail isn't strong enough, slide an old bank card along the seam to pop it open. When replacing the CR2025 battery, remember the orientation – in most cases, the metal side should face down. Make sure you hear a clear click when putting the cover back on; last time I didn't secure it properly and had to reopen and reinstall it when the key stopped working midway. By the way, you can get five batteries for just ten bucks at an auto parts store, way more cost-effective than the dealership.

[Suzanne]

Changing the battery yourself is quite simple: Look at the tail of the key, use a coin to pry open the metal back cover. CR2025 batteries are available at convenience stores. When removing the old battery, pay attention to the positive and negative terminal orientation. When installing the new battery, press it in with the shiny side facing up, then gently close the cover until the clips snap into place. Avoid touching the circuit board contacts during the entire process. After installation, test whether the button indicator light comes on. It takes just two minutes to complete, saving over 200 yuan in dealership labor costs.

[FelicityFitz]

My experience with replacing key fob batteries taught me that the hardest part isn't the technical work. First, you need to confirm it's a CR2025 battery - genuine ones bought online for 9.9 with free shipping are more reliable than local shops. Using a plastic tool to pry the back cover is safer than metal to avoid scratching the chrome plating. The key is ensuring the battery fully seats in the groove during installation, otherwise poor contact causes intermittent remote function. After replacement, test all buttons thoroughly, especially the trunk release which is most easily overlooked.