How to Replace the Key Battery for Mercedes-Benz E-Class?

[McSawyer]

To replace the key battery for a Mercedes-Benz E-Class, follow these steps: 1. First, prepare a CR2032 battery. 2. Push the emblem upwards from the tail to remove the mechanical key. 3. Open the key casing. 4. Remove the old battery, insert the new one, and snap the key casing back together. 5. Finally, reinsert the mechanical key into the key fob. The Mercedes-Benz E-Class is a mid-to-large-size executive sedan developed by Mercedes-Benz, positioned between the C-Class and S-Class. The exterior dimensions of the E-Class are 5026mm in length, 1854mm in width, and 1477mm in height, with a wheelbase of 3014mm. The engine displacement ranges from 1998 to 3498. Its features include an automatic climate control system, electric massage seats, an audio and communication system, and a comprehensive safety package.