BjoernB:
The way I read it - it's a simple tool to get into a tight spot at home or some places where it's hard to get in/out of the car. (many of us surely remember putting cushions or a hanging Tennisball down to know how far you can go in yr own Garage) As to the security - that could be easily done over Bluetooth - simple if you loose Connection the car stops. Modern parking sensors are pretty accurate and although it surely is a "Gimmick" I find it rather cool and usefull
The problem is not to make sure the car gets out of control if the connection fails, this is easily doable. The problem is the connection per se, via Bluetooth. Of course this is kind of safer than some cars which may be accessible via WiFi because of the networked(?) WiFi hotspot they offer. Also, you do not really have to hack into the wireless connection per se but a MITM attack or using a trojan to access the user's device or something similar would be sufficient.
I have no particular experience with CAN bus designs, etc. but a good friend has a nice and small bluetooth operated OBD dongle and it is quite impressive what he can do with this thing.
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RC (Germany) - Rennteam Editor Porsche 991 Carrera 4 GTS Cabriolet, Porsche Macan Turbo, Ford Mustang GT500 Shelby SVT (2014), Jeep Grand Cherokee SRT (2014)