How to Replace the Battery in the New Mercedes-Benz A45 Key?
3 Answers
The steps to replace the battery in the new Mercedes-Benz A45 key: 1. Press the button on the top of the remote key to remove the mechanical key; 2. Insert the mechanical key into the slot of the remote key and give it a slight upward tap; 3. The seam of the remote key will slightly open, then use the mechanical key to slide down along this gap to open it. The new Mercedes-Benz A45 is a model under the Mercedes-Benz brand, with a body length of 5289mm, a width of 2109mm, a height of 1503mm, and a wheelbase of 3216mm. The car is equipped with a unique dashboard, an AMG sports steering wheel, and Recaro sports seats, with carbon fiber materials covering multiple areas inside the vehicle.
I've been driving a Mercedes for years, and changing the key battery is a common task. The design of the new A45's key is quite user-friendly, with a small groove on the back cover that can be pried open with a fingernail or a small tool. Avoid using excessive force, as the plastic casing can easily break. The battery is a CR2032 model, commonly found at Walmart or supermarkets, and it's not expensive. When removing the old battery, be careful not to touch the metal contacts. Simply insert the new battery with the positive side facing up, and close the cover until it clicks. Afterward, test the start button or lock button to ensure everything works. I've done this several times myself, saving on dealership fees and making it convenient. I recommend buying two spare batteries in case of sudden failure, as it can be troublesome if the key runs out of power when you're out.
As a frequent DIYer, I've replaced the battery in a Mercedes key. The new A45 key's back cover has small clips—use a small flathead screwdriver or coin to gently pry it open, avoiding overly sharp tools to prevent scratches. The CR2032 battery inside is easy to remove and costs just 5 yuan at supermarkets. When installing, ensure the positive side faces the specific marked direction to avoid reversal. Test the remote function immediately after snapping the cover shut to confirm proper signal. I recommend keeping fine tweezers handy for easier battery handling. If the key feels too tight, carefully examine its structure first—don't rush and risk damage. DIY benefits include speed, cost savings, and experience gained. Always wash hands afterward to maintain cleanliness and prevent static interference.
