I think we had a thread around this a while back but I wasn't sure if this question was asked or how it was concluded (or if it can be).
Basically it's around the question of can a keyless car, once started continue without the key?
Now, I believe this is the case as that's how the device-in-the-middle thefts work but someone has suggested three cars they know of that are keyless all cut off / immobilise once the car <> key are out of range of each other?
Maybe it's user set able but if there is some law / standard that determines how they should all work, could enabling the ability to immobilise in the absence (or failure) of the key make it 'illegal'?
Like what if a key battery went flat (assuming they have one) or the key got thrown out of the window?
Maybe those that 'dock' in the dash can't be removed once the ignition is on and so couldn't suffer the issues mentioned above of if they key is being held by your passenger and you drop them off at the motorway services and then you re-join the motorway without they key?
I understand how they might not let you re-start the car without the key, but not that it caused the car to cut out once started. Or maybe it only allows the car to self immobilise if traveling slowly or stopped or within an initial time etc?
Cheers, T i m