What to Do When Mercedes Remote Key Fails?

[LeKinsley]

Solutions for Mercedes key failure: Disassemble the key to check if the battery is dead or if there is any corrosion. Inspect the unlock button for any malfunctions. If the battery is dead, replace it immediately. In case of corrosion or malfunction, replacement is the only option. Here are the steps to replace the car key battery: 1. Press the button on the car remote key to pop out the mechanical key. 2. Hold the car key with the icon facing up. Grip both sides of the key with your left hand while pressing down with your right thumb. Pull outward with both hands, then push the right half of the key downward. Use a small knife to pry open the gap until the key splits into two parts. 3. Separate the part without the pattern by prying open the middle gap. Between the two parts is a rubber strip. Use a small knife to remove the round lithium battery.