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:
Problems with the transmission
Problem
Possible causes/consequences and
Solutions
The transmission has problems shifting gear.
The transmission is losing oil.
- Have the transmission checked at a qualif ...
2011 Mercedes-Benz R-Class Review
As family-haulers go, the Mercedes-Benz R350 Bluetec is a nice rig — perhaps
too nice for the sippy-cup-and-Cheerios gang. Even though the R350 doesn't fit
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Important safety notes
WARNING
When leaving the vehicle, always remove the SmartKey from the ignition lock.
Always take the SmartKey with you and lock the vehicle. Do not leave children unattended
in the vehicle, ...
