Hi zzzzz
I think you will find if you unlock the car and not open any doors it will re-lock itself after approx 30 seconds.
As form the remote start it will probably time out after 7 to 10 minutes.
I know the system we retro fit the engine run time is default to 7 mins and dealer adjustable to max 25 mins they also switch off the engine if the hand brake is released put in gear or the brake pedal is pressed without turning the ignition on 1st.
Also the range on some of the after market units is approx 1k in the open or world wide with the GSM option.
SS Dave
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