What is the tutorial for replacing the battery in an old Mercedes CLK key?
2 Answers
The steps to replace the battery in an old Mercedes CLK key are as follows: 1. Flip open the tab at the rear end of the key to remove the mechanical key: Insert the mechanical key into the side slot of the key, press the internal gray button, and with the other hand, push the rear end of the key upward. When a gap opens, you can remove the mechanical key. 2. Then, manually remove the rear end: This allows you to replace the battery. 3. After installing the new battery: Reinsert the key holder, and the key battery replacement is complete. 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. The first is when you press the ignition switch, the dashboard will display a message to replace the key battery. The second is when you press the lock or unlock button on the key, the indicator light on the key will dim or fail to illuminate.
I just replaced the battery in my old Mercedes CLK key and found that it typically uses a CR2032 coin cell. First, locate the small gap along the edge of the key, then gently pry open the casing using a coin or a small flat-head screwdriver—avoid using excessive force to prevent damaging the clips. Once opened, you'll see the old battery; remove it with a tool or your fingernail. Insert the new battery with the positive side facing up, ensuring proper alignment. Check if the contact points are clean—wipe off any dust if necessary. Then, close the casing and press firmly until you hear a click, indicating it's securely fastened. If the key starts responding slowly, it's time to replace the battery, usually every two years. Never use a soldering iron or handle it with wet hands to avoid short-circuiting and damaging the circuitry. Remember, this simple and cost-effective DIY process saves you a trip to the dealership.
