How to Replace the Battery in a Mercedes-Benz R550L Key?
2 Answers
The method to replace the battery in a Mercedes-Benz R550L key is: 1. Remove the mechanical key; 2. Insert a tool into the slightly larger hole at the back of the key slot and gently pry; 3. Press the battery lightly to remove and replace it, then reverse the steps to reassemble. The dimensions of the Mercedes-Benz R550L are: length 5173mm, width 1922mm, height 1661mm, with a wheelbase of 3215mm and a fuel tank capacity of 80 liters. The Mercedes-Benz R550L is equipped with a 5.5L naturally aspirated engine, delivering a maximum power of 285kW and a maximum torque of 230Nm, paired with a 7-speed automatic transmission.
When replacing the battery for my own Mercedes-Benz R550L key, I noticed a small notch on the side of the key. First, use a small flat-head screwdriver to gently pry open the casing, being careful not to apply too much force to avoid damaging the plastic. Inside, there's a CR2032 coin cell battery. Remember, the battery has a positive and negative side; place it with the '+' sign facing up in the correct position. Remove the old battery and discard it, then insert the new battery and press it into place to reset. The whole process takes just two minutes, but make sure to operate in a dry area to prevent water damage or short circuits. A depleted key battery usually shows symptoms like reduced unlocking range or unresponsive buttons. I recommend keeping a spare battery at home, as this type is commonly available in supermarkets. After replacement, test if the functions are restored. If it still doesn't work, there might be an issue with the key module, and it may need professional repair.
