How to Replace the Battery in a Mercedes ML500 Key?
2 Answers
The method to replace the battery in a Mercedes ML500 key is: 1. Locate and press the button on the back of the key, then slide the back cover forward to open the key; 2. Remove the old battery from the slot and replace it with a new one. Taking the 2008 Mercedes ML500 as an example, it belongs to the mid-to-large-size SUV category, with body dimensions of: length 4788mm, width 1911mm, height 1779mm, wheelbase 2915mm, and a fuel tank capacity of 95 liters. The 2008 Mercedes ML500 features an Airmatic active air suspension in the front and rear, and is equipped with a 5.5L naturally aspirated engine, delivering a maximum horsepower of 388PS, maximum power of 285kW, maximum torque of 530Nm, paired with a 7-speed automatic transmission.
I just replaced the battery for my ML500 key the other day, and it was actually quite simple. First, you need to prepare a CR2032 button battery, which you can easily find at a convenience store. There's a small slit on the side of the key. I tried prying it open with my fingernail but couldn't, so I found a small flat-head screwdriver at home and gently pried it open, causing the back cover to pop off. Inside, there's a small silver disc—that's the old battery. Be careful when removing it to avoid dropping it into the internal structure of the key. When inserting the new battery, pay special attention to the orientation—the side with the text must face upward, otherwise the circuit won't work. When snapping the cover back on, make sure it aligns with the clips, and press around the edges until you hear a click to ensure it's securely fastened. The whole process took about ten minutes and was much easier than I expected. I recommend replacing it about once a year to avoid the key suddenly failing when you're out.
