Remote engine start system and method

1. A method comprising:

in response to a triggering event, changing a remote engine start system in a vehicle from a first system state to a second system state, wherein in the first system state a remote engine start mode, a drive engine of the vehicle and a plurality of vehicle functions of the vehicle are deactivated, and wherein in the second system state the remote engine start mode, at least one of the plurality of vehicle functions and the drive engine of the vehicle are activated;

after activating the remote engine start mode, incrementing or decrementing a timer, starting from a predetermined start value;

if the timer has not yet elapsed and the presence of a user is detected, changing to a third system state, wherein in the third system state the last timer value and the current state of the remote engine start mode are stored and then the remote engine start mode and the timer are stopped, wherein the drive engine remains switched on;

if it is detected that the user, after the presence thereof has been recognized, moves away again from the vehicle without having moved the vehicle, returning to the second system state, by continuing the remote engine start mode, re-establishing the stored timer value, and continuing the incrementing or decrementing of the timer.

2. The method as claimed in claim 1 , further comprising:

if it is detected that the timer has elapsed, changing to the first system state, by switching off the drive engine and deactivating the remote engine start mode.

3. The method as claimed in claim 2 , wherein the at least one vehicle function is also deactivated with the switching off of the drive engine.

4. The method as claimed in claim 1 , further comprising:

if, after the detection of the presence of the user, the vehicle is moved before the user moves away again from the vehicle, deactivating the remote engine start mode and erasing the stared timer value and the stored state of the remote engine start mode.

5. The method as claimed in claim 4 , further comprising:

after the user has parked and switched off the vehicle, switching off the drive engine and changing to the first state.

6. The method as claimed in claim 1 , wherein the triggering event comprises the reception of a signal from a portable electronic device.

7. A remote engine start system in a vehicle, wherein the remote engine start system comprises a timer, and wherein the remote engine start system is designed,

in response to a triggering event, to change from a first system state to a second system state, wherein in the first system state a remote engine start mode, a drive engine of the vehicle and a plurality of vehicle functions of the vehicle are deactivated, and wherein in the second system state the remote engine start mode, at least one of the plurality of vehicle functions and a drive engine of the vehicle are activated;

after changing to the second system state and activating the remote engine start mode, incrementing or decrementing the timer, starting from a predetermined start value;

if the timer has not yet elapsed and the presence of a user is detected, changing to a third system state, wherein in the third system state the last timer value and the current state of the remote engine start mode are stored and then the remote engine start mode and the timer are stopped, wherein the drive engine remains switched on;

if it is detected that the user, after the presence thereof has been recognized, moves away again from the vehicle without having moved the vehicle, returning to the second system state, by continuing the remote engine start mode, re-establishing the stored timer value, and continuing the incrementing or decrementing of the timer.

8. The remote engine start system as claimed in claim 7 , further comprising a detection unit to detect the presence of a user.