This is an unusual request, not made lightly.

My dad (who spent most of his working life with one of the largest Volvo dealerships) has gotten too old to drive safely. Trouble is that his insight is not always there and he might be tempted to take a ride to the store.

Our family has talked to him about this for some time now. Truth is, I'm scared that he might loose his judgment and I'd like to disable his car to make sure that he doesn't take a ride and hurt someone. I disconnected the coil wire but he complained that he needs to start the car to keep the battery charged. I've since reconnected the coil. Besides, just sitting in the driveway with the engine running gives him a sense of well-being.

Any suggestions on a quick (reversible) 'drive-disable' that will allow him to turn the engine on once in a while? I know I could take the wheels off but I don't think the neighbors would appreciate it and I don't want to embarrass my father either. He has 1989 960 intercooled Turbo sedan.

I know this is a potentially controversial issue and it is not without mixed feelings that I write this. I am asking for technical advice only.

Thank you.
longhorizon