See also:

Transporting the vehicle
The towing eyes or trailer tow hitch can be used to pull the vehicle onto a trailer or transporter if you wish to transport it. ► Turn the SmartKey to position 2 in the ignition lock. ...

Cleaning the headliner and carpets
  Headliner: use a soft brush or a cleaning agent recommended and approved by Mercedes-Benz to remove heavy soiling.   Carpets: use the carpet and textile cleaning agents recommended ...

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 ...