Mercedes-Benz E-Class: General notes - Smart Key - Opening/closing - Mercedes-Benz E-Class Owners ManualMercedes-Benz E-Class: General notes

If you cannot lock or unlock the vehicle with the SmartKey, either the battery in the SmartKey is discharged, the SmartKey is faulty or the starter battery is discharged.

•► Check the battery in the SmartKey and replace it if necessary.

•► Unlock the driver's door using the mechanical key.

•► Lock the vehicle using the mechanical key.

•► Have the starter battery and the battery contacts checked at a qualified specialist workshop.

If the SmartKey is faulty, contact Roadside Assistance or a qualified specialist workshop.

    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 unsupervised in the vehic ...

    See also:

    Door Locks
    To lock both doors, push the front of the master door lock switch on either door, pull the lock tab rearward on the driver’s door, or use the key on the outside lock on the driver’s do ...

    Interior light
    Do not use the interior lights for extended periods when the engine is not running. It may cause battery discharge. ...

    Technical specifications
    Vehicle fluids * Providing it meets the specification defined by WSS-M2C913-C, you can also useFord Engine Oil or an alternative engine oil. Topping up the oil: If you are unable to find an oil ...