Using KEYLESS-GO to start the engine

As long as the SmartKey is in your vehicle, the 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 engine.
When leaving the vehicle, always take the SmartKey with you and lock the vehicle. Do not leave children unattended in the vehicle, or with access to an unlocked vehicle. A child's unsupervised access to a vehicle could result in an accident and/or serious personal injury.

The Start/Stop button can be used to The Start/Stop button can be used to start the vehicle without inserting the SmartKey into the ignition lock. The Start/ Stop button must be inserted into the ignition lock and the SmartKey must be in the vehicle.

- Depress the brake pedal and keep it depressed.
- To start a gasoline engine: press the Start/Stop button once.
The engine starts.
- To start a diesel engine: press the Start/Stop button once.
Preglow is activated and the engine starts.

    See also:

    Important safety notes
    The fuses in your vehicle serve to close down faulty circuits. If a fuse blows, all the components on the circuit and their functions stop operating. WARNING Only use fuses approved by Merce ...

    Rejects or ends a call
    Press the button on the steering wheel. If you are not in the Telephone menu, you can still reject or end a call. ...

    Snow chains
    For safety reasons, Mercedes-Benz recommends that you only use snow chains which have been specially approved for your vehicle by Mercedes-Benz, or are of a corresponding standard of quality. ...