What is the tutorial for replacing the battery in an old Mercedes-Benz E280 key?
2 Answers
The tutorial for replacing the battery in an old Mercedes-Benz E280 key is: 1. First, flip open the tab at the rear end of the key to remove the mechanical key; 2. Insert the mechanical key into the slot on the side of the key, press the internal gray button, and with the other hand, push the rear end of the key upward. When a gap appears, the owner can remove the mechanical key; 3. Then, manually remove the rear end to replace the battery; 4. After installing the new battery, reinsert the key bracket. In terms of appearance, the E280 features Mercedes-Benz's iconic large air intake grille, which exudes a steady sharpness, providing sufficient air for the 3.0L V6 engine. The side lines are very stylish, with curves diverging from the front sharply rising to the A-pillar, then rapidly descending to the B and C-pillars, connecting to the voluminous trunk. The sharp curves reflect the unique design aesthetics of the Germanic people. The wheel arches on the fenders highlight a strong sense of sportiness, with a slightly flared design accentuating a robust feel.
I recently replaced the key battery for my old Mercedes-Benz E280, and it was quite simple. That key is of the folding type, with a small gap in the middle. I used a thin flat-head screwdriver to gently pry open the top cover. Inside, you'll find a round CR2025 battery—make sure not to get the model wrong, as this is the standard type. Be careful when removing the old battery; just pull it out with your fingers, and avoid scratching the circuit board with tools. Then, insert the new battery with the positive side facing up—don’t reverse it, or it might short-circuit. After reassembling, don’t rush to close it immediately. First, press the key button to check if the indicator light turns on. If it does, it means success. Finally, press the cover back gently until you hear a click, and you’re done. The whole process takes just a few minutes, but be careful not to use too much force to avoid damaging the plastic shell. The battery is easy to find at auto parts stores or online—just make sure to choose a high-quality brand to avoid frequent replacements. Doing it yourself saves money compared to going to the dealership and gives you some hands-on experience. But if you’re not confident, it’s best to leave it to professionals—safety first. The key battery usually lasts two to three years, so if it frequently malfunctions, check it.
