See also:

System self-test
The indicator lamp illuminates when you: turn the SmartKey to position 1 or 2 in the ignition lock on vehicles with KEYLESS-GO, press the Start/Stop button once or twice If an adult occupa ...

Using KEYLESS-GO to start the engine
WARNING As long as the SmartKey is in your vehicle, the vehicle can be started. Therefore, never leave children unattended in the vehicle, as they could otherwise accidentally start the engin ...

Please bear the following in mind
The engine oils are matched to the performance of Mercedes-Benz engines and service intervals. You should therefore only use engine oils and oil filters that are approved for vehicles with mai ...