How to Replace the Key Battery for Mercedes-Benz ML280 Diesel Version?
2 Answers
Mercedes-Benz ML280 diesel version key battery replacement method is as follows: 1. For newer car keys after 2014. There is a button on the back of the key. Press this button and push the back cover forward to open the key. The battery is located in the slot next to it. 2. For Mercedes keys from 2006 to 2013. First, flip open the tab at the rear end of the key to remove the mechanical key. Insert the mechanical key into the slot at the tab position and apply slight force to pop open the back cover. Remove the depleted old battery and replace it with a new one. Close the back cover to complete the key battery replacement. 3. Key battery replacement interval. The lifespan of a Mercedes key battery is generally two years, while the original factory battery can last up to six years. When the key battery is depleted, the Mercedes vehicle will provide two types of alerts: one is when pressing the ignition switch, the instrument panel will display a message to replace the key battery; the other is when pressing the lock or unlock button on the key.
I also drive a Mercedes ML280 diesel version, and recently the key ran out of battery. After some tinkering, I found that replacing it is quite simple. First, look for a small groove on the back of the key, then gently pry it open with a small flat-head screwdriver. Be careful not to use too much force, or the plastic shell might crack. Inside, the battery is a CR2032 coin cell—make sure the positive and negative terminals are aligned correctly and not reversed. After replacing it with a new one, press the key to test the remote function. The whole process only takes a few minutes, saving you a trip to the dealership. As the car ages, the key tends to consume more power, so it's advisable to keep a few spare batteries at home. Avoid using sharp metal tools; a plastic pry tool is safer. Also, check if the lights flash normally after parking to prevent potential issues.
