See also:

General information
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 ...

Using KEYLESS-GO
The KEYLESS-GO key must be outside the vehicle. All the doors must be closed. - Touch recessed sensor surface 1 on the door handle until the side windows and the sliding sunroof or the pano ...

DEF
Important safety notes For BlueTEC vehicles only. DEF is a non-flammable, non-toxic, colorless, odorless and water-soluble fluid. Only use DEF that complies with ISO 22241. Do not add any ...