What is the method for replacing the key battery in a Mercedes-Benz S500?
3 Answers
The method for replacing the key battery in a Mercedes-Benz S500 is: 1. Push the small toothed switch at the tail of the key to the right, which will pop up the manual key; 2. After pulling out the key, gently insert it into the hole at the rear of the key slot to touch the buckle of the key battery cover; 3. Pry open the buckle, remove the old battery, and replace it with a new one. Taking the 2021 Mercedes-Benz S500 as an example, it belongs to the large car category, with body dimensions of: length 5290mm, width 1921mm, height 1503mm, wheelbase 3216mm, and fuel tank capacity of 76l. The 2021 Mercedes-Benz S500 has a front suspension of double-wishbone independent suspension and a rear suspension of multi-link independent suspension. It is equipped with a 3.0l twin-turbocharged engine, with a maximum horsepower of 313ps, maximum power of 230kw, maximum torque of 450nm, and is matched with a 9-speed automatic manual transmission.
Last time I replaced the key battery for my friend's S500, the operation was actually quite simple and could be done in minutes. You'll need a CR2032 coin cell battery and a small flathead screwdriver. Locate the slender groove on the side of the key, then gently pry open the casing with the screwdriver—don't use too much force, as Mercedes keys are exquisitely crafted. After removing the silver metal cover, you'll see the battery; note that the positive side faces upward. Use a toothpick or plastic piece to remove the old battery. When installing the new one, make sure the positive side faces outward, and a click sound indicates proper installation. Simply snap the casing back together. Replace the battery when you notice the key's remote range shortening or the dashboard indicates low battery, and try to do it indoors during rainy seasons to avoid moisture damage.
Just replaced the battery in my 2018 S500 key fob. The process went smoothly overall. It's best to prepare anti-static gloves for electronic repairs, which can be purchased at any electronics market. When prying open the casing, I noticed Mercedes specifically designed an unlocking mechanism at the clasp position - gently sliding a fingernail along the edge is safer. Use tweezers to carefully flip open the battery compartment's retaining spring. After the old battery pops out, remember to clean the contacts with alcohol swabs. The new battery must be CR2032 type, with brand-name versions costing around 20 yuan. Don't rush to reassemble after battery installation - press the buttons a few times to check if the red light illuminates. You'll know the casing is properly secured when you hear three consecutive clicks. It's recommended to check the key fob's battery every two years, considering a new Mercedes key replacement costs thousands.
