Terrafirma electronic cruise control kits are available in two versions for 2002-2007 Defender Td5, as 'basic' and 'factory' and also 2007> Defender Td4 in the 'factory' version only.
For the basic version functions are controlled by two buttons. The speed is adjusted using the SET button. When this button is held down, the Defender accelerates; when it is released, the Defender maintains the current speed. The second button, RESET/RESUME has two function. If cruise control is active, pressing RESET/RESUME deactivates it. When it is pressed again, the most recently stored speed is recalled, and the Defender gradually accelerates automatically until this speed is reached. Cruise is also deactivated when the brakes or clutch are used. Cruise control can generally be used at speeds of 45km/h (28mph) and above. The basic version will not operate in conjunction with a GKN overdrive,
The 'factory' version is a highly sophisticated cruise control kit that looks and works as the name suggests exactly like you would expect in a factory fit option. The control stalk is perfectly suited to Land Rover Defender applications and operation barely requires your hand to leave the steering wheel. All typical cruise control functions are operated from the stalk and likewise cruise is deactivated with clutch and brake operation.