Your Land Rover is always in 4wd you CANNOT disengage 4wd. The procedure to engage low range on a modern Land Rover ( not a series vehicle) is.
1. with the vehicle stopped and the engine running and the handbrake off.
2. select neutral on the transmission.
3. move the transfer case lever forward in to low range. (front right)
4. To engage diff-lock pull the transfer case lever to the left.
note diff-lock can be engaged at any time but should not be used on hard surfaces such as Pavement, or concrete. and should not be engaged during a turn or while there is a difference in front to rear axle speed... as this WILL DESTROY your transfer case!
The 2012 Land-Rover Range-Rover-Evoque has all wheel drive.
The 2013 Land-Rover Range-Rover-Evoque has all wheel drive.
The 2014 Land-Rover Range-Rover-Evoque has all wheel drive.
The 2014 Land-Rover LR2 has all wheel drive.
The 2008 Land-Rover LR2 has all wheel drive.
The 2013 Land-Rover LR2 has all wheel drive.
The 2010 Land-Rover LR2 has all wheel drive.
The 2011 Land-Rover LR2 has all wheel drive.
The 2009 Land-Rover LR2 has all wheel drive.
The 2012 Land-Rover LR2 has all wheel drive.
I'm going to have to assume you either mis-stated the question or are making a joke. Land Rovers are ALL full-time 4 wheel drive. there is no 2 wheel drive mode. Or did you mean that it was stuck in differential lock mode?
The Land Rover Discovery offers several safety features, such as ABS, seatbelts, and airbags. It comes further equipped with plenty of room, 5 doors, and all-wheel drive.