SmartKey battery

Important safety notes

WARNING

Batteries contain toxic and corrosive substances. If batteries are swallowed, it can result in severe health problems. There is a risk of fatal injury.

Keep batteries out of the reach of children. If a battery is swallowed, seek medical attention immediately.

Mercedes-Benz recommends that you have the batteries replaced at a qualified specialist workshop.

Checking the battery

■ Press the or
button.

The battery is working properly if battery check lamp 1 lights up briefly.

The battery is discharged if battery check lamp 1 does not light up briefly.

■ Change the battery  .

If the SmartKey battery is checked within the signal reception range of the vehicle, pressing the or
button:
• locks or • unlocks the vehicle

You can get a battery at any qualified specialist workshop.

Replacing the battery

You require a CR 2025 3 V cell battery.

■ Take the mechanical key out of the SmartKey  .

1 Battery compartment cover 2 Mechanical key

■ Press mechanical key 2 into the opening in the SmartKey in the direction of the arrow until battery compartment cover 1 opens. Do not hold battery compartment cover 1 closed while doing so.

■ Remove battery compartment cover 1.

3 Battery

■ 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 compartment cover 1 into the housing first and then press to close it.

■ Insert mechanical key 2 into the SmartKey.

■ Check the function of all SmartKey buttons on the vehicle.