Reducing the energy consumption of the key
Deactivate key function
If you do not use the vehicle or a key for an extended period of time, you can also deactivate the function of the key to reduce the energy consumption of the key.
Press and hold the key 
button.
button. With the key button pressed, immediately press key button 
twice in quick succession.
pressed, immediately press key button twice in quick succession. The indicator light of the key lights up once briefly and once for a long time.
Deactivate key function
Press any key on the key.
The key function is automatically activated when the vehicle is started with the key in the gearshift console slot More.
Overview of the Mercedes-Benz emergency call system
The Mercedes-Benz emergency call system can help to decisively reduce the time between an accident and the arrival of emergency services at the site of the accident. It helps locate an accident site in places that are difficult to access.
The emergency call can be triggered automatically More.
You also have the option of triggering the emergency call manually More. Only make emergency calls if you or others are in need of rescue. Do not make an emergency call in the event of a breakdown or a similar situation.