Just for the record and I have done the bumper to bumper trick a time or two. No ill effects that I know of, but they were pre-computer cars. What with the rediculous cost of todays electronical wizardry, I don't think I would take the chance. Probably wouldn't work anyway with all the plastic in the way
Also, my apologies as well, StationWagonGuy, for stepping on your thread. Hope someone was helpful here.