How to Completely Disassemble a Mercedes Key?
3 Answers
To disassemble a Mercedes key, first press the black button to the other side, pull out the mechanical key, and then use the mechanical key to forcefully pry open the key casing. The functions of the Mercedes key are as follows: One-touch door opening: Lock the doors, insert the key to start the vehicle. Long press the lock button: All window glasses will close. Long press the unlock button: All four windows will roll down. Trunk button: Press once to unlock the trunk, long press to automatically pop open the trunk. Remote control sleep function: Press the remote control twice to enter sleep mode.
I've taken apart Mercedes key fobs several times, mostly to replace batteries or clean the interior. Most keys have plastic shells without screws - simply locate the keyring hole or small grooves along the edges, then gently pry open using a plastic spudger or credit card. Avoid metal tools to prevent scratches. On my first attempt, I rushed and cracked the casing, but later learned to slightly heat the plastic with a heat gun to soften it before prying, which made it much easier. The interior contains chips and contact points - wear anti-static gloves and avoid direct contact with circuits to prevent short circuits. After replacing the CR2032 battery, reassemble by aligning the clips and firmly pressing them together, ensuring the sealant isn't cracked to prevent water damage. Mercedes key repairs are expensive, so careful disassembly can save hundreds. I recommend checking tutorial videos for your specific model first to avoid mistakes. The whole process takes about ten minutes but requires patience - don't rush and damage critical components.
Recently, when I took apart my Mercedes key and found it unresponsive, I decided to fix it myself. The key's surface is smooth with no screws, so I found a thin gap, such as the indentation on the side, and gently pried it open with an old bank card or plastic sheet, moving slowly to avoid small springs or parts from popping out. Once opened, the internal structure is compact, with the battery held under a metal clip—remove it gently to replace it. I also checked the button contacts for dust and cleaned them with an alcohol swab. When reassembling, align the shell properly and press firmly to close. Avoid deep disassembly of the mainboard if you're not a professional; sticking to the battery area is safer. Test the switch function to ensure it works before feeling at ease. The entire process should be done on a clean table to avoid losing parts. Successfully solving the issue saved repair time, but if it gets damaged, reconfiguring the key would be troublesome—so if unsure, don’t overdo it. DIY is fun, but proceed with caution at every step.
