Deactivating the key functions
If you do not use the vehicle or a key for an extended period of time, you can reduce the energy consumption of the respective key. To do so, deactivate the key functions.
To deactivate:
press the 
button on the key twice in quick succession. The key indicator lamp flashes twice briefly and lights up once.
To activate:
press any button on the key. When the vehicle is started with the key in the stowage compartment of the centre console, the key functions are automatically activated More.