See also:

Range
The remote key has a range of approximately 60 ft. (20 m) from the vehicle. NOTE Buildings or other obstacles may interfere with the function of the remote key. The vehicle can also be locked ...

Reverse
The vehicle must be stationary when position R is selected. ...

Driving on rough/unpaved surfaces
The Volvo XC90 is designed primarily for onroad driving, and it has excellent handling characteristics on very rough or unpaved roads. When driving on poorly maintained or unpaved roads, please ...