Changing the battery

You require a CR 2025 3 V cell battery.

  • Take the mechanical key out of the SmartKey ().

  • Press mechanical key 2 into the opening in the SmartKey in the direction of the arrow until battery tray cover 1 opens. When doing so, do not hold cover 1 shut.
  • Remove battery tray cover 1.

  • Repeatedly tap the SmartKey against your palm until battery 3 falls out.
  • Insert the new battery with the positive terminal facing upwards. Use a lint-free cloth to do so.
  • Make sure that the surface of the battery is free from lint, grease and all other forms of contamination.
  • Insert the front tabs of battery tray cover 1 and then press to close it.
  • Insert the mechanical key into the SmartKey.
  • Check the function of all SmartKey buttons on the vehicle.
    See also:

    Service messages
    Information on the type of service and service intervals (see separate Service Booklet). You can obtain further information from an authorized Mercedes-Benz Center or at http://www.mbusa.com (U ...

    Replacing the rear window wiper blade
    Removing the wiper blade •► Remove the SmartKey from the ignition lock. •► Fold wiper arm 1 away from the rear window until it engages. •► Position wiper blade 2 at a right ...

    E350 In the Market
    As I've said, the E350 is among the finest luxury cars I've driven. Loaded with all the options, it stickers for $51,100 so it better be. Still, I don't mind paying for quality, and if something i ...