How to Replace the Battery in the New Mercedes-Benz C200L Key?
4 Answers
The method to replace the battery in the Mercedes-Benz C200L key is: 1. Gently press the switch on the back of the key to remove the mechanical key; 2. Press the key back cover opening button on the back of the key to remove the back cover; 3. Push the battery compartment on the left side of the key; 4. Remove the old battery and insert the new battery. Taking the 2020 Mercedes-Benz C200L as an example, it belongs to the mid-size car category, with body dimensions of: length 4784mm, width 1810mm, height 1457mm, wheelbase 2920mm, and a fuel tank capacity of 66l. The 2020 Mercedes-Benz C200L is equipped with a 1.5l turbocharged engine, producing a maximum horsepower of 156ps, maximum power of 115kw, maximum torque of 250nm, and is paired with a 9-speed automatic transmission.
To replace the battery for the Mercedes-Benz C200L key, I recommend starting by preparing the tools. You'll need to purchase a CR2032 coin cell battery, which can be found at supermarkets or auto parts stores, usually costing around five yuan. Then, find a small Phillips-head screwdriver; if you don't have one, a hard card or a small blade can also work, but be careful not to scratch the key. The newer key has a seam along the edge on the back—gently pry open the top half of the shell along that seam. Don't use too much force; I've learned the hard way that a broken shell is difficult to repair. Before removing the old battery, note the orientation of the positive and negative terminals, and insert the new battery in the same direction, ensuring it fits snugly. Then, close the shell and press firmly until you hear a click to lock it in place. Test the lock and unlock functions to confirm they work properly. Normally, the battery lasts two to three years. If it frequently dies, check that the car key isn't left in hot places, like inside a car under the sun. I also recommend keeping a spare new battery in the car just in case—replacing it takes about ten minutes, so don't let small issues delay your driving. Doing it yourself saves the time and cost of visiting a repair shop.
As a daily driver, I prioritize efficiency, and replacing the key fob battery is straightforward. First, purchase a matching CR2032 battery—don’t get the wrong model, or it won’t work. Prepare small tools like a utility knife or a dedicated key pry tool, available for a few bucks at hardware stores. Locate the seam in the middle of the key’s backside, gently pry open the cover, and avoid excessive force to prevent plastic damage. Remove the old battery, noting the polarity markings, then insert the new battery and snap the cover back on. Test the buttons immediately to ensure responsiveness—locking the car confirms success. The whole process takes under five minutes, so skip the dealership to avoid high service fees. I also check the battery voltage annually with a simple multimeter to extend the key’s lifespan. If the key still doesn’t work after replacement, it might be a circuit issue, and professional repair is advised. For peace of mind, follow online tutorial videos—it’s virtually risk-free.
Hey, I've done this a few times, it's super easy like changing a watch battery. First step, grab a CR2032 battery, you can get a pack of ten on Amazon or Taobao. Use a thin coin or your fingernail to pry open the clip at the end of the key, just a gentle push and it'll come apart. Take out the old battery, don't just toss it, recycle it properly. Put the new battery in with the positive side up as shown, snap the cover back on and test the function. If the lock light comes on, you're good. I always keep a spare battery case in the car too, one change lasts about two years so no worries about sudden power loss. The whole process takes two or three minutes, even a beginner can do it, no need to worry about messing up. Remember not to force the case open to avoid damaging the clips. Try to keep the key away from damp places to reduce battery drain. Easy to do and saves a lot of hassle.
