Ignition Will Not Turn Off On My Xsara 1.9td

[Elang]

I have a '99 (T Reg) 1.9TD Westcoast edition with an interesting problem my Dad is a Mechanic and we have even had a chap plug the car in to see what is wrong but no one can tell me.

 

Hope you guys can help. When I come to switch my engine off it will not switch off. I can walk away with the key in my hand and the engine will still be running. It will not let you drive it as when you put it in gear and try to drive it stalls. Which means that currently I am having to stall it every time I want to switch my engine off.

 

In addition my heater plug light does not work on the dash board and I am wondering if somewhere along the line the problems are related.

 

I have everything crossed that someone can help me as I cannot afford to replace the car.