What is the battery model for a Mercedes-Benz car key?
3 Answers
Most Mercedes-Benz car keys use the CR2025 3V battery model. The remote key for the car contains a battery, which typically lasts 2 to 3 years. If the battery runs out, it needs to be replaced. To replace the battery in the key, simply pry open the key's outer shell and then replace the battery. The Mercedes-Benz E300 is a mid-to-large luxury sedan under the Mercedes-Benz brand. The car's body dimensions are 4947 mm in length, 1860 mm in width, and 1470 mm in height, with a wheelbase of 2939 mm. The Mercedes-Benz E300 is equipped with three engines: a 1.5-liter turbocharged engine, a low-power 2.0-liter turbocharged engine, and a high-power 2.0-liter turbocharged engine.
Last time I replaced the battery for my Mercedes key, it took me quite a while. Most models use CR2025 button batteries, like the C-Class I drive. However, it really depends on the key version - older models like the ML350 might use CR2032. The most accurate way is to open the key cover and check the number marked on the old battery. You can find these batteries at supermarkets or auto parts stores, but avoid cheap ones as they may leak and corrode the circuit. Replacing it yourself is simple - just use a coin to pry open the key shell and make sure not to reverse the polarity. After replacement, test the locking function to ensure it works properly. If your car is over three years old, pay extra attention to the battery lifespan.
The issue with Mercedes car key batteries is quite common. Both of my family's Mercedes vehicles use CR2025 batteries. The replacement process is super simple: first, pull out the mechanical key, then use a fingernail or thin card to pry open the casing—be careful not to scratch the plastic clips with metal tools. You can buy a new battery for about ten yuan at a convenience store, just remember to choose reputable brands like Panasonic or Sony. However, I've heard that some AMG models use CR2032 batteries in their keys, so the safest approach is to check the old battery's model number after opening it. Doing it yourself saves over 200 yuan compared to going to the dealership, and it only takes five minutes. After replacement, remember to test all the buttons.
