i have fitted simple rally battery cut off switch in the car which would need both the key and location of switch for car to be got working i know its a punto and probably not going to be a car some one will want to boost
I once had one for these fitted to one of the Panda's, but connected it to the coil, so the clock etc in the car would still work. Result would be the engine turning but not firing if not switched, lol.