See also:

Problems with the SmartKey
Problem Possible causes/consequences and Solutions You cannot lock or unlock the vehicle using the SmartKey. The SmartKey battery is discharged or nearly discharged. ...

Tire pressure specifications
WARNING   Follow recommended tire inflation pressures. Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect handling and fuel economy, and ...

General notes
The Active Driving Assistance package consists of DISTRONIC PLUS (Y page 169), Active Blind Spot Assist (Y page 202) and Active Lane Keeping Assist (Y page 205). ...